Re: Servlet and Random Access File
I would like to refer to an example servlet where I can add fields (such as name, staff number, etc...) to a random access file and view the file information by accessing the field (eg. staff number). Please help. Thank you. Yours Sincerely, TEH David Smith [EMAIL PROTECTED] wrote: The key phrase here is ...that really suits my needs. Could you provide more information? Your question is a rather generic one not all that specific to java servlets. --David Teh Noranis Mohd Aris wrote: Hello All, Does anyone have an example of a servlet program that uses random access file or any useful links? I tried searching yahoo and google but could not find one that really suits my needs. Thank you. Yours Sincerely, TEH - Get your own web address. Have a HUGE year through Yahoo! Small Business. - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - Get the free Yahoo! toolbar and rest assured with the added security of spyware protection.
Re: Using servlet and mysql
Dear All,
I already put mysql database driver (jar file) in directory
catalina_home\common\lib and changed 8080 to 3306 but I got the error
java.sql.SQLException: Unable to connect to any hosts due to exception:
java.net.ConnectException: Connection refused: connect. What should be the
matter? I put the database name, teh in directory catalina_home\webapps\ROOT\.
Is this correct? In which directory should I actually put the database name?
Please help. I'm running out of time! Thank you so much.
Yours Sincerely,
TEH
Foo Shyn [EMAIL PROTECTED] wrote:
Hi,
You'll need to get the MySQL database driver and put them in the
{catalina_home}\common\lib folder. The driver can be easily obtained
through MySQL site.
BTW, as far as i know, the default port for MySQL database is 3306, so
you might wanna change that. 8080 is for Tomcat, not the database.
Seems like not many new users of connection pooling went through
Apache's documents. Please don't waste their effort, take a look at it
before you start to attempt anything.
HTH,
FooShyn
Teh Noranis Mohd Aris wrote:
Thank you so much for the reply. I've put jdbc:mysql://localhost:8080/teh
but I got the error java.lang.ClassNotFoundException: com.mysql.jdbc.Driver.
I'm very new to using mysql database and servlet. Can you please explain to
me how to create the database name and its fields? Should I install any
driver? How can it be done? Please help. Thank you.
Yours Sincerely,
TEH
Foo Shyn wrote:
Hi,
would be ur database port, xxx will be ur database name
HTH
FooShyn
Teh Noranis Mohd Aris wrote:
Hi,
I would like to access mysql database from a servlet but I'm not sure what
to initialize for the String connectionURL marked as
jdbc:mysql://localhost:/xxx in the program below. I got this program
from the internet which I would like to run in my computer. Can anyone
please explain to me what the parameters and xxx should be?
Yours Sincerely,
TEH
Following is part of the program:
...
public void doPost(HttpServletRequest request, HttpServletResponse
response) throws ServletException, IOException{
response.setContentType(text/html);
PrintWriter pw = response.getWriter();
String connectionURL = jdbc:mysql://localhost:/xxx;
Connection connection=null;
try{
String username = request.getParameter(username);
String password = request.getParameter(password);
pw.println(username);
pw.println(password);
Class.forName(com.mysql.jdbc.Driver).newInstance();
connection = DriverManager.getConnection(connectionURL, root, root);
PreparedStatement pst = connection.prepareStatement
(insert into login_table values(?,?));
...
-
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Re: Using servlet and mysql
Yes, the login name and password are correct. I created the database name, teh,
with field username and password, using Microsoft Works Database and saved it
in directory catalina_home\webapps\ROOT\. I'm not sure whether it is the
correct directory to put the database. However, in the program there was a
statement .(insert into login_table values(?,?)); I do not understand the
usage of login_table. Does it mean that I should create login_table in database
teh? Really need to get this working today. Please help. Thank you.
TEH
Foo Shyn [EMAIL PROTECTED] wrote:
Hi,
Is your login name and password correct? It shows 'root' and the
password is 'root' in the code you posted there.
- I put the database name, teh in directory catalina_home\webapps\ROOT\
hmm i can't really get what you meant here.
Thanx.
FooShyn
Teh Noranis Mohd Aris wrote:
Dear All,
I already put mysql database driver (jar file) in directory
catalina_home\common\lib and changed 8080 to 3306 but I got the error
java.sql.SQLException: Unable to connect to any hosts due to exception:
java.net.ConnectException: Connection refused: connect. What should be the
matter? I put the database name, teh in directory
catalina_home\webapps\ROOT\. Is this correct? In which directory should I
actually put the database name? Please help. I'm running out of time! Thank
you so much.
Yours Sincerely,
TEH
Foo Shyn wrote:
Hi,
You'll need to get the MySQL database driver and put them in the
{catalina_home}\common\lib folder. The driver can be easily obtained
through MySQL site.
BTW, as far as i know, the default port for MySQL database is 3306, so
you might wanna change that. 8080 is for Tomcat, not the database.
Seems like not many new users of connection pooling went through
Apache's documents. Please don't waste their effort, take a look at it
before you start to attempt anything.
HTH,
FooShyn
Teh Noranis Mohd Aris wrote:
Thank you so much for the reply. I've put jdbc:mysql://localhost:8080/teh
but I got the error java.lang.ClassNotFoundException: com.mysql.jdbc.Driver.
I'm very new to using mysql database and servlet. Can you please explain to
me how to create the database name and its fields? Should I install any
driver? How can it be done? Please help. Thank you.
Yours Sincerely,
TEH
Foo Shyn wrote:
Hi,
would be ur database port, xxx will be ur database name
HTH
FooShyn
Teh Noranis Mohd Aris wrote:
Hi,
I would like to access mysql database from a servlet but I'm not sure what
to initialize for the String connectionURL marked as
jdbc:mysql://localhost:/xxx in the program below. I got this program
from the internet which I would like to run in my computer. Can anyone
please explain to me what the parameters and xxx should be?
Yours Sincerely,
TEH
Following is part of the program:
...
public void doPost(HttpServletRequest request, HttpServletResponse
response) throws ServletException, IOException{
response.setContentType(text/html);
PrintWriter pw = response.getWriter();
String connectionURL = jdbc:mysql://localhost:/xxx;
Connection connection=null;
try{
String username = request.getParameter(username);
String password = request.getParameter(password);
pw.println(username);
pw.println(password);
Class.forName(com.mysql.jdbc.Driver).newInstance();
connection = DriverManager.getConnection(connectionURL, root, root);
PreparedStatement pst = connection.prepareStatement
(insert into login_table values(?,?));
...
-
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3:05 PM
-
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Checked by AVG Free Edition.
Version: 7.5.472 / Virus Database: 269.8.0/821 - Release Date: 5/27/2007
3:05 PM
-
To start a new topic, e-mail: users@tomcat.apache.org
To unsubscribe, e-mail: [EMAIL PROTECTED]
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Checked by AVG Free
Re: Using servlet and mysql
I'm very new to this. This is the first time I'm using mysql and servlet. I
might be doing a lot of mistakes. I realized that I should not use Microsoft
Works Database. How can I actually create the database name, table and its
field using mysql? In which directory should I put the database? Please
explain. Hoping for a reply. I really hope this simple program can run today.
Thank you.
TEH
Foo Shyn [EMAIL PROTECTED] wrote:
Hi,
This is getting more confusing, you mentioned earlier that you're using
MySQL but now it is a Microsoft Works Database. Hmmm perhaps i'm missing
something?
Anyway, if the database you're using is something like an Access
database, you'll just need to use the correct driver and point the URL
to your database file. Can't help you here coz i never tried that before
(Access is like from another world to me). Perhaps you should try other
mailing list, and not Tomcat's.
HTH
FooShyn
Teh Noranis Mohd Aris wrote:
Yes, the login name and password are correct. I created the database name,
teh, with field username and password, using Microsoft Works Database and
saved it in directory catalina_home\webapps\ROOT\. I'm not sure whether it is
the correct directory to put the database. However, in the program there was
a statement .(insert into login_table values(?,?)); I do not understand
the usage of login_table. Does it mean that I should create login_table in
database teh? Really need to get this working today. Please help. Thank you.
TEH
Foo Shyn wrote:
Hi,
Is your login name and password correct? It shows 'root' and the
password is 'root' in the code you posted there.
- I put the database name, teh in directory catalina_home\webapps\ROOT\
hmm i can't really get what you meant here.
Thanx.
FooShyn
Teh Noranis Mohd Aris wrote:
Dear All,
I already put mysql database driver (jar file) in directory
catalina_home\common\lib and changed 8080 to 3306 but I got the error
java.sql.SQLException: Unable to connect to any hosts due to exception:
java.net.ConnectException: Connection refused: connect. What should be the
matter? I put the database name, teh in directory
catalina_home\webapps\ROOT\. Is this correct? In which directory should I
actually put the database name? Please help. I'm running out of time! Thank
you so much.
Yours Sincerely,
TEH
Foo Shyn wrote:
Hi,
You'll need to get the MySQL database driver and put them in the
{catalina_home}\common\lib folder. The driver can be easily obtained
through MySQL site.
BTW, as far as i know, the default port for MySQL database is 3306, so
you might wanna change that. 8080 is for Tomcat, not the database.
Seems like not many new users of connection pooling went through
Apache's documents. Please don't waste their effort, take a look at it
before you start to attempt anything.
HTH,
FooShyn
Teh Noranis Mohd Aris wrote:
Thank you so much for the reply. I've put jdbc:mysql://localhost:8080/teh
but I got the error java.lang.ClassNotFoundException:
com.mysql.jdbc.Driver. I'm very new to using mysql database and servlet.
Can you please explain to me how to create the database name and its
fields? Should I install any driver? How can it be done? Please help. Thank
you.
Yours Sincerely,
TEH
Foo Shyn wrote:
Hi,
would be ur database port, xxx will be ur database name
HTH
FooShyn
Teh Noranis Mohd Aris wrote:
Hi,
I would like to access mysql database from a servlet but I'm not sure what
to initialize for the String connectionURL marked as
jdbc:mysql://localhost:/xxx in the program below. I got this program
from the internet which I would like to run in my computer. Can anyone
please explain to me what the parameters and xxx should be?
Yours Sincerely,
TEH
Following is part of the program:
...
public void doPost(HttpServletRequest request, HttpServletResponse
response) throws ServletException, IOException{
response.setContentType(text/html);
PrintWriter pw = response.getWriter();
String connectionURL = jdbc:mysql://localhost:/xxx;
Connection connection=null;
try{
String username = request.getParameter(username);
String password = request.getParameter(password);
pw.println(username);
pw.println(password);
Class.forName(com.mysql.jdbc.Driver).newInstance();
connection = DriverManager.getConnection(connectionURL, root, root);
PreparedStatement pst = connection.prepareStatement
(insert into login_table values(?,?));
...
-
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Version: 7.5.472 / Virus Database: 269.8.0/821 - Release Date: 5/27/2007
3:05 PM
-
To start a new topic, e-mail: users
Servlet and Random Access File
Hello All, Does anyone have an example of a servlet program that uses random access file or any useful links? I tried searching yahoo and google but could not find one that really suits my needs. Thank you. Yours Sincerely, TEH - Get your own web address. Have a HUGE year through Yahoo! Small Business.
Using servlet and mysql
Hi,
I would like to access mysql database from a servlet but I'm not sure what to
initialize for the String connectionURL marked as
jdbc:mysql://localhost:/xxx in the program below. I got this program from
the internet which I would like to run in my computer. Can anyone please
explain to me what the parameters and xxx should be?
Yours Sincerely,
TEH
Following is part of the program:
...
public void doPost(HttpServletRequest request, HttpServletResponse
response) throws ServletException, IOException{
response.setContentType(text/html);
PrintWriter pw = response.getWriter();
String connectionURL = jdbc:mysql://localhost:/xxx;
Connection connection=null;
try{
String username = request.getParameter(username);
String password = request.getParameter(password);
pw.println(username);
pw.println(password);
Class.forName(com.mysql.jdbc.Driver).newInstance();
connection = DriverManager.getConnection(connectionURL, root, root);
PreparedStatement pst = connection.prepareStatement
(insert into login_table values(?,?));
...
-
Sick sense of humor? Visit Yahoo! TV's Comedy with an Edge to see what's on,
when.
Re: Using servlet and mysql
Thank you so much for the reply. I've put jdbc:mysql://localhost:8080/teh but
I got the error java.lang.ClassNotFoundException: com.mysql.jdbc.Driver. I'm
very new to using mysql database and servlet. Can you please explain to me how
to create the database name and its fields? Should I install any driver? How
can it be done? Please help. Thank you.
Yours Sincerely,
TEH
Foo Shyn [EMAIL PROTECTED] wrote:
Hi,
would be ur database port, xxx will be ur database name
HTH
FooShyn
Teh Noranis Mohd Aris wrote:
Hi,
I would like to access mysql database from a servlet but I'm not sure what to
initialize for the String connectionURL marked as
jdbc:mysql://localhost:/xxx in the program below. I got this program
from the internet which I would like to run in my computer. Can anyone please
explain to me what the parameters and xxx should be?
Yours Sincerely,
TEH
Following is part of the program:
...
public void doPost(HttpServletRequest request, HttpServletResponse
response) throws ServletException, IOException{
response.setContentType(text/html);
PrintWriter pw = response.getWriter();
String connectionURL = jdbc:mysql://localhost:/xxx;
Connection connection=null;
try{
String username = request.getParameter(username);
String password = request.getParameter(password);
pw.println(username);
pw.println(password);
Class.forName(com.mysql.jdbc.Driver).newInstance();
connection = DriverManager.getConnection(connectionURL, root, root);
PreparedStatement pst = connection.prepareStatement
(insert into login_table values(?,?));
...
-
Sick sense of humor? Visit Yahoo! TV's Comedy with an Edge to see what's on,
when.
No virus found in this incoming message.
Checked by AVG Free Edition.
Version: 7.5.472 / Virus Database: 269.8.0/821 - Release Date: 5/27/2007 3:05
PM
-
To start a new topic, e-mail: users@tomcat.apache.org
To unsubscribe, e-mail: [EMAIL PROTECTED]
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Coverting Program to Servlet
Dear All,
The following program uses socket. How can I convert it to servlet? Please
help. Thank you.
Yours Sincerely,
TEH
import java.io.*;
import java.net.*;
import java.awt.*;
import java.awt.event.*;
public class Exercise18_3Server {
// Declare a random access file
RandomAccessFile raf = null;
public static void main(String args[]) {
new Exercise18_3Server();
}
public Exercise18_3Server() {
// Open the local file on the server side
try {
// Open the file if the file exists, create a new file if the file does
not exist
raf = new RandomAccessFile(student.dat, rw);
}
catch(IOException e) {
System.out.print(Error: + e);
System.exit(0);
}
// Establish server socket
try {
// Create a server socket
ServerSocket ss = new ServerSocket(8000);
int count = 1;
ThreadGroup tg = new ThreadGroup(serving clients);
while (true) {
if (tg.activeCount() 2) {
// Connect to a client
Socket s = ss.accept();
// Start a new thread to register a client
Thread t = new Thread(tg, new RegistrationThread(s, count++));
t.start();
System.out.println(tg.activeCount() + active threads);
}
else {
try {Thread.sleep(200); }
catch (InterruptedException ex) { }
}
}
}
catch (IOException e) {
System.err.println(e);
}
}
// Define a thread to process the client registration
class RegistrationThread extends Thread {
private Socket sock; // The socket to serve a client
private int num; //the socket label
// The file to store the records
// Buffer reader to get input from the client
private BufferedReader in;
private PrintWriter out;
public RegistrationThread(Socket sock, int num) {
this.sock = sock;
this.num = num;
System.out.println(Thread + num + running);
// Create an input stream to receive data from a client
try {
in = new BufferedReader
(new InputStreamReader(sock.getInputStream()));
out = new PrintWriter(sock.getOutputStream(), true);
}
catch(IOException ex) {
System.out.println(Error + ex);
}
}
public void run() {
String name;
String street;
String city;
String state;
String zip;
try {
// Get command
String command = in.readLine();
if (command.equals(Register)) {
// Receive data from the client
name = new String(in.readLine());
street = new String(in.readLine());
city = new String(in.readLine());
state = new String(in.readLine());
zip = new String(in.readLine());
// Display data received
System.out.println(The following data received from the client);
System.out.println(name: + name);
System.out.println(street: + street);
System.out.println(city: + city);
System.out.println(state: + state);
System.out.println(zip: + zip);
// Create a student instance
Student s = new Student(name, street, city, state, zip);
// Append it to student.dat
raf.seek(raf.length());
s.writeStudent(raf);
}
else if (command.equals(View)) {
name = new String(in.readLine());
Student s = search(name);
if (s == null) {
out.println(not found);
}
else {
out.println(found);
out.println(s.getStreet());
out.println(s.getCity());
out.println(s.getState());
out.println(s.getZip());
}
}
}
catch (IOException e) {
System.err.println(e);}
}
public Student search(String name) {
Student s = new Student();
try {
raf.seek(0);
long length = raf.length();
while (raf.getFilePointer() length) {
s.readStudent(raf);
if (name.trim().equals(s.getName().trim())) return s;
System.out.println(Find anything? + name ++ s.getName());
}
}
catch(IOException ex) {
System.out.print(Error: + ex);
}
return null;
}
}
class Student {
private String name;
private String street;
private String city;
private String state;
private String zip;
// The size of five string fields in the record
final int NAME_SIZE = 32;
final int STREET_SIZE = 32;
final int CITY_SIZE = 20;
final int STATE_SIZE = 2;
final int ZIP_SIZE = 5;
// The total size of the record in bytes, a Unicode
// character is 2 bytes size.*/
final int RECORD_SIZE =
(NAME_SIZE + STREET_SIZE + CITY_SIZE + STATE_SIZE + ZIP_SIZE);
Student() {
}
Student(String name, String street, String city,
String state, String zip ) {
this.name = name;
this.street = street;
this.city = city;
this.state = state;
this.zip = zip;
}
public String getName() {
return name;
}
public String getStreet()
Re: Cannot Access Tomcat Server Using IP Address
I already solve the problem. I fixed the program and it works! Thank you so much for the replies. Yours Sincerely, TEH Teh Noranis Mohd Aris [EMAIL PROTECTED] wrote: Yes, I can access the login.html interface from a different computer using http://IPaddress:8080/login.html but when I tried to access a file, I got the mentioned problem displayed in the text area. However, I can access a file if I'm using http://localhost:8080/login.html. I'm testing using Windows XP. What should I do? Thank you. TEH Omar Eljumaily wrote: I don't understand. Are you able to access login.html from outside your server machine? The socketpermerission problem you have sounds like a firewall issue or a administrator privileges problem not allowing you to accept incoming sockets. Are you running with administrator privs on XP? XP and Linux deal with firewalls and permissions differently. Linux is a bit more straight forward in my opinion. You just accept queries on 8080 and then redirect port 80 if you want to resolve static pages. SELinux can be an issue, but is usually simple to solve by tweaking a setting. Teh Noranis Mohd Aris wrote: Thank you. It's working now, the application can be accessed but when I type a file name to access a file in the server, I got an error java.security.AccessControlException:access denied (java.net.SocketPermission localhost:8080 connect, resolve). How can I solve this problem? For your information, I'm now using Windows XP Operating System but I plan to use Linux Fedora Operaing System later. Is there a difference in accessing the application using different operating system? Thank you. Yours Sincerely, TEH David Smith wrote: Include the port number in your request -- ie http://ipaddress:8080/login.html --David Teh Noranis Mohd Aris wrote: Dear All, I've tested my applications using http://localhost:8080/login.html in the same computer and it works. However, when I tried to acces my applications using an IP Address in another computer by typing http://ipaddress/login.html, The page cannot be found is displayed. How can I access my applications using IP address? Please help me. Thank you. Yours Sincerely, TEH - Give spam the boot. Take control with tough spam protection in the all-new Yahoo! Mail Beta. - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - Take the Internet to Go: Yahoo!Go puts the Internet in your pocket: mail, news, photos more. - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - No need to miss a message. Get email on-the-go with Yahoo! Mail for Mobile. Get started. - Moody friends. Drama queens. Your life? Nope! - their life, your story. Play Sims Stories at Yahoo! Games.
Cannot Access Tomcat Server Using IP Address
Dear All, I've tested my applications using http://localhost:8080/login.html in the same computer and it works. However, when I tried to acces my applications using an IP Address in another computer by typing http://ipaddress/login.html, The page cannot be found is displayed. How can I access my applications using IP address? Please help me. Thank you. Yours Sincerely, TEH - Give spam the boot. Take control with tough spam protection in the all-new Yahoo! Mail Beta.
Re: Cannot Access Tomcat Server Using IP Address
Thank you. It's working now, the application can be accessed but when I type a file name to access a file in the server, I got an error java.security.AccessControlException:access denied (java.net.SocketPermission localhost:8080 connect, resolve). How can I solve this problem? For your information, I'm now using Windows XP Operating System but I plan to use Linux Fedora Operaing System later. Is there a difference in accessing the application using different operating system? Thank you. Yours Sincerely, TEH David Smith [EMAIL PROTECTED] wrote: Include the port number in your request -- ie http://ipaddress:8080/login.html --David Teh Noranis Mohd Aris wrote: Dear All, I've tested my applications using http://localhost:8080/login.html in the same computer and it works. However, when I tried to acces my applications using an IP Address in another computer by typing http://ipaddress/login.html, The page cannot be found is displayed. How can I access my applications using IP address? Please help me. Thank you. Yours Sincerely, TEH - Give spam the boot. Take control with tough spam protection in the all-new Yahoo! Mail Beta. - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - Take the Internet to Go: Yahoo!Go puts the Internet in your pocket: mail, news, photos more.
Re: Cannot Access Tomcat Server Using IP Address
Yes, I can access the login.html interface from a different computer using http://IPaddress:8080/login.html but when I tried to access a file, I got the mentioned problem displayed in the text area. However, I can access a file if I'm using http://localhost:8080/login.html. I'm testing using Windows XP. What should I do? Thank you. TEH Omar Eljumaily [EMAIL PROTECTED] wrote: I don't understand. Are you able to access login.html from outside your server machine? The socketpermerission problem you have sounds like a firewall issue or a administrator privileges problem not allowing you to accept incoming sockets. Are you running with administrator privs on XP? XP and Linux deal with firewalls and permissions differently. Linux is a bit more straight forward in my opinion. You just accept queries on 8080 and then redirect port 80 if you want to resolve static pages. SELinux can be an issue, but is usually simple to solve by tweaking a setting. Teh Noranis Mohd Aris wrote: Thank you. It's working now, the application can be accessed but when I type a file name to access a file in the server, I got an error java.security.AccessControlException:access denied (java.net.SocketPermission localhost:8080 connect, resolve). How can I solve this problem? For your information, I'm now using Windows XP Operating System but I plan to use Linux Fedora Operaing System later. Is there a difference in accessing the application using different operating system? Thank you. Yours Sincerely, TEH David Smith wrote: Include the port number in your request -- ie http://ipaddress:8080/login.html --David Teh Noranis Mohd Aris wrote: Dear All, I've tested my applications using http://localhost:8080/login.html in the same computer and it works. However, when I tried to acces my applications using an IP Address in another computer by typing http://ipaddress/login.html, The page cannot be found is displayed. How can I access my applications using IP address? Please help me. Thank you. Yours Sincerely, TEH - Give spam the boot. Take control with tough spam protection in the all-new Yahoo! Mail Beta. - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - Take the Internet to Go: Yahoo!Go puts the Internet in your pocket: mail, news, photos more. - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - No need to miss a message. Get email on-the-go with Yahoo! Mail for Mobile. Get started.
How to read file content from servlet?
Dear All,
I have an applet that sends data name, score and ScoreFile to a servlet that
get these data to be saved in a file. My question is, how can I send these data
from the servlet to the applet (reversed) so that I can use only the data name
in processing? Please help. Thank you.
Yours Sincerely;
TEH
The applet is as follows:
URL servletUrl = null;
URLConnection con;
String servletName = http://localhost:8080/examples/servlet/ServerSide;;
try {
servletUrl = new
URL(servletName+?name=+name+score=+score+ScoreFile=+ScoreFile);
con=servletUrl.openConnection();
con.setUseCaches(false);
BufferedReader buf = new BufferedReader(new
InputStreamReader(con.getInputStream())); }
catch(Exception e) {
System.out.println(Exception caught...+e); }
The servlet is as follows:
String name = request.getParameter(name);
int score = Integer.parseInt(request.getParameter(score));
String ScoreFile = request.getParameter(ScoreFile);
String fileName = C:/temp/+ScoreFile;
FileWriter resultsFile = new FileWriter(fileName,true);
PrintWriter toFile = new PrintWriter(resultsFile,true);
toFile.println(name+ +score);
toFile.close();
-
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Is it possible to have more than one submit button in a JSP file?
Dear All, I hope all of you can still remember me. I had the problem of writing the file content from an applet to a servlet. Now, I'm using JSP and it works. However, from JSP code examples, I always see only one submit button to the server. I would like my system to have several submit buttons that is connected to the server, for example a button for displaying a file from the server and a button for saving a file to the server. The file to display and the file to save should use the same textarea. How should it be done? If there are any source code examples, can anyone please post it to me? Please help! Thank you. Yours Sincerely, TEH NORANIS - Need Mail bonding? Go to the Yahoo! Mail QA for great tips from Yahoo! Answers users.
Re: Is it possible to have more than one submit button in a JSP file?
Dear All, Maybe my question is not that clear. What I mean, is that there are 2 buttons that read data from the server and write data to the server using one textarea. If anyone have the code or come across the code, please e-mail it to me. Thank you. TEH Hassan Schroeder [EMAIL PROTECTED] wrote: On 3/28/07, Teh Noranis Mohd Aris wrote: I would like my system to have several submit buttons This is a basic HTML question, nothing to do with JSP. Yes, a form in an HTML document can have multiple submit buttons; reading the appropriate recommendation is, uh, recommended :-) HTH, -- Hassan Schroeder [EMAIL PROTECTED] - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - Don't be flakey. Get Yahoo! Mail for Mobile and always stay connected to friends.
Re: File Content Not Saved To Server
Dear All,
I've already modified my program based on Mr. Christopher's solution but
thers's still the word null in the file.
You probably have a null content variable. String.valueOf(null) returns
null, so that's probably what's happening.
I only declared URL servletUrl = null but now I already commented it.
For your information, the purpose of my program is ONLY to save information
from the client to the server. I don't intend to send back information from the
server to the client.
My complete program looks like this now after the suggested modification
(ClientIdea.java, ServerIdea.java, ClientIdea.html not included):
// C:\jakarta-tomcat-4.1.31\webapps\ROOT\ClientIdea.java
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.JApplet;
import javax.swing.text.BadLocationException;
import java.net.*;
import java.io.*;
import java.util.*;
public class ClientIdea extends JApplet implements ItemListener,
ActionListener
{
JPanel panel1, panellabel, panelbutton, paneltext;
JTextField namefile;
JButton jbtSave;
JTextArea textEditor;
JLabel labelfile;
public void init()
{
Container container = getContentPane();
namefile = new JTextField(10);
panel1 = new JPanel();
panellabel = new JPanel();
panelbutton = new JPanel();
paneltext = new JPanel();
labelfile = new JLabel(File Name);
panellabel.setLayout(new FlowLayout(FlowLayout.LEFT,50,0));
panellabel.add(labelfile);
panellabel.add(namefile);
panelbutton.setLayout(new GridLayout(1,1));
panelbutton.add(jbtSave = new JButton(Save));
textEditor = new JTextArea(18,63);
textEditor.setFont(new Font(monospaced,Font.PLAIN,12));
JScrollPane scrollPane1 = new JScrollPane(textEditor);
Linenumber linenumber1 = new Linenumber ( textEditor );
scrollPane1.setRowHeaderView(linenumber1);
paneltext.add(scrollPane1);
panel1.add(panellabel);
panel1.add(paneltext);
panel1.add(panelbutton);
container.add(panel1);
jbtSave.addActionListener (
new ActionListener() {
public void actionPerformed (ActionEvent en) {
savefile();
}
}
);
} // end init
public void actionPerformed(ActionEvent ae)
{
} // End action perform
public void itemStateChanged(ItemEvent ie)
{
} // End item state changed
public void savefile()
{
String filename = namefile.getText();
String teditor = textEditor.getText();
//URL servletUrl = null;
URL servletUrl;
URLConnection con;
String servletName = http://localhost:8080/examples/servlet/ServerIdea;
try
{
servletUrl = new URL(servletName + ?filename= + filename);
con = servletUrl.openConnection();
con.setDoOutput(true);
con.setRequestProperty(Content-Type,text/plain;charset=UTF-8);
con.connect();
OutputStreamWriter out = new
OutputStreamWriter(con.getOutputStream(),UTF-8);
out.write(teditor, 0, teditor.length());
out.flush();
out.close();
DataInputStream in = new DataInputStream(con.getInputStream());
in.close();
}
catch(Exception e)
{
System.out.println(Exception caught...+e);
}
} // end savefile
} // end class ClientIdea
// C:\jakarta-tomcat-4.1.31\webapps\examples\WEB-INF\classes\ServletIdea.java
import java.io.*;
import java.text.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class ServerIdea extends HttpServlet {
public void doGet(HttpServletRequest req, HttpServletResponse res) throws
IOException, ServletException
{
String name = req.getParameter(filename);
String content = req.getParameter(teditor);
PrintWriter outFile = new PrintWriter(new OutputStreamWriter(new
FileOutputStream(C:/temp/+name)));
outFile.println(content);
outFile.close();
}
public void doPost(HttpServletRequest req, HttpServletResponse res) throws
IOException, ServletException {
doGet(req, res);
}
}
Did I miss out anything? Please help me! Thank you.
Yours Sincerely,
TEH NORANIS
Christopher Schultz [EMAIL PROTECTED] wrote:
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
Teh,
Teh Noranis Mohd Aris wrote:
Now, a file name that was input by the user
was created BUT the problem is that, when I open the file, the word
null was written to the file NOT the file content.
You probably have a null content variable. String.valueOf(null) returns
null, so that's probably what's happening.
The filename
parameter was sent from the applet to the servlet BUT the file
content parameter was not sent.
You're going to want to fix that.
This means that the file content
parameter does not exist and the servlet did not receive the file
content parameter!
Sounds about right. If I were you, I would modify my program to do
nothing if there's no file content parameter. (Well, I would actually
use PUT and place
Re: File Content Not Saved To Server
Dear All, First, thank you so much for the reply, Mr. Christopher Schultz. In my program, I want the servlet to load an applet where I can input the file name in a given text field and the file content in a given text area. When the user has input the information, I want to POST the file name and its content from the applet to the servlet. The servlet will then GET the parameters (file name and file content) from the applet and save the file content in C:/temp/ based on the file name that has been input. I do not know whether I pass the parameters from the applet to the servlet correctly. After I input the file name and the file content, 2 files were created by the system: 1. a file with the name null 2. a source code file with a file name from the user input with no content at all. The system should only create one file with a file name and the file content based on the user input. The main problem is that 2 files were created. One question that was asked to me is Why are you saving a file AND serving a page in the same servlet? Yes, I'm using the same servlet to save a file and serving a page to save files. What is actually the matter with that approach? Another question was about What you want is a POST with the content of your file in the request body -- NOT in the request parameters. Can you please elaborate the statement? How should I actually solve this problem? Please explain in detail. I'm really waiting for a prompt reply. Thank you so much. Yours Sincerely, TEH NORANIS Christopher Schultz [EMAIL PROTECTED] wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Teh, Teh Noranis Mohd Aris wrote: I want to save a file name and its content to the computer server at directory C:/temp/. I've passed the file name and file content parameter from the applet to the servlet. The problem now is that the file name is created in the computer server directory but a 'null' is included in the file content. Can anyone please help me solve the problem why this is happening? servletUrl = new URL(servletName + ?filename=+filename+teditor=+teditor); con = servletUrl.openConnection(); con.setUseCaches(false); BufferedReader buf = new BufferedReader(new InputStreamReader(con.getInputStream())); This isn't what you want to do. What you want is a POST with the content of your file in the request body -- NOT in the request parameters. That isn't to say that your attempt won't work... it's just that there are many limitations on passing information through a URL (such as any maximum URL length limits set by your web server). HttpSession session = req.getSession(); PrintWriter out = res.getWriter(); out.println(); out.println(); out.println(); out.println(Save File To Server); ... This is a very odd way to do things. Why are you saving a file AND serving a page to save files in the same servlet? String name = req.getParameter(filename); String content = req.getParameter(teditor); String nameFile = C:/temp/+name; FileWriter resultsFile = new FileWriter(nameFile,true); PrintWriter toFile = new PrintWriter(resultsFile,true); toFile.println(content); toFile.close(); So, do you get a file in C:\TEMP\whatever? If so, what is the content of the file. You said a null... do you mean a 0 byte file? Or the word null? - -chris -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.6 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFF6KD09CaO5/Lv0PARAph4AJ0RFetzCrvK7kylCLOjfz0s2lNtngCfVgSg 06XYsRJpi0Bn/mEjBsAnp4I= =6KXD -END PGP SIGNATURE- - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - Access over 1 million songs - Yahoo! Music Unlimited.
Re: File Content Not Saved To Server
Dear All, Thank you so much for the explanation, Mr. Christopher Schultz. I understand that by just using a file input type, I can upload a file directly. In fact, I already construct the program and it is already working. However, I choose to use applet to get the advantage of Java GUI programming, which is event-driven. Actually, the save file module is only part of the system. I'm going to try what has been suggested and I will get to you soon. Thank you so much. Yours Sincerely, TEH NORANIS Christopher Schultz [EMAIL PROTECTED] wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Teh, Teh Noranis Mohd Aris wrote: In my program, I want the servlet to load an applet where I can input the file name in a given text field and the file content in a given text area. Just out of curiosity, why do you want an applet to do this when you can just use a file input type and upload a file directly? When the user has input the information, I want to POST the file name and its content from the applet to the servlet. You are not using a POST. You are using a GET. If you want to use a POST, you will have to write your file content to the request body, instead of putting it into a URL parameter. You had something like this: String url = http://.../servlet?filename=[name]content=[contents];; URLConnection conn = new URL(url).openConnection(); conn.connect(); conn.close(); Instead, you should do something like this: String url = http://...servlet?filename=[name];; URLConnection conn = new URL(url).openConnection(); conn.setDoOutput(true); conn.setHeader(Content-Length, contents.length()); conn.connect(); OutputStream out = conn.getOutputStream(); out.write(contents); out.flush(); out.close(); conn.close(); This will put the contents of your file into the request body, instead of in the URL parameters. I do not know whether I pass the parameters from the applet to the servlet correctly. To check that the parameters are correct, put something like this into your servlet code: System.out.println(param[filename] = + request.getParameter(filename)); Also, you might want to print out the fill path of the file you are trying to create. This really ought to do it: File target = new File(C:\\TEMP, filename); FileOutputStream out = new FileOutputStream(target); out.write(contents); out.flush(); out.close(); After I input the file name and the file content, 2 files were created by the system: 1. a file with the name null 2. a source code file with a file name from the user input with no content at all. I'm not sure how that extra file is being created. Your code only had a single open call. Is it possible that null was created from an old copy of the code, and you just forgot to delete the file? Finally, don't use a FileWriter unless you know that you are dealing with text. Otherwise, binary files will be corrupted. I'm not sure if that matters to you, but creating a servlet that handles any type of file will be more useful than one that only handles text. Yes, I'm using the same servlet to save a file and serving a page to save files. What is actually the matter with that approach? It just seems that the save file servlet should do nothing but save a file. Why have this servlet return any content at all? If I were writing this system, I would have the following files: applet.html (contains element to serve the applet) SaveFileServlet (saves files, as discussed) When you want to display the applet, just display applet.html. Otherwise, your SaveFileServlet will write to a file called null every time you try to display the page (that's probably where your null file is coming from). Only call the SaveFileServlet when you actually want to save data. - -chris -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.6 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFF6b3n9CaO5/Lv0PARApg9AKCHsXSGif7v69laYl4u1DHmGvRrHACbB7cz z2uU32oMdoJKcvL1/9EXf6A= =sF79 -END PGP SIGNATURE- - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - Never miss an email again! Yahoo! Toolbar alerts you the instant new Mail arrives. Check it out.
File Content Not Saved To Server
Dear All,
I want to save a file name and its content to the computer server at
directory C:/temp/. I've passed the file name and file content parameter from
the applet to the servlet. The problem now is that the file name is created in
the computer server directory but a 'null' is included in the file content. Can
anyone please help me solve the problem why this is happening?
Thank you so much.
The applet is as follows:
// AppletSave.java
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.JApplet;
import javax.swing.text.BadLocationException;
import java.net.*;
import java.io.*;
import java.util.*;
public class AppletSave extends JApplet implements ItemListener,
ActionListener
{
JPanel panel1, panellabel, panelbutton, paneltext;
JTextField namefile;
JButton jbtSave;
JTextArea textEditor;
JLabel labelfile;
public void init()
{
Container container = getContentPane();
namefile = new JTextField(10);
panel1 = new JPanel();
panellabel = new JPanel();
panelbutton = new JPanel();
paneltext = new JPanel();
labelfile = new JLabel(File Name);
panellabel.setLayout(new FlowLayout(FlowLayout.LEFT,50,0));
panellabel.add(labelfile);
panellabel.add(namefile);
panelbutton.setLayout(new GridLayout(1,1));
panelbutton.add(jbtSave = new JButton(Save));
textEditor = new JTextArea(18,63);
textEditor.setFont(new Font(monospaced,Font.PLAIN,12));
JScrollPane scrollPane1 = new JScrollPane(textEditor);
Linenumber linenumber1 = new Linenumber ( textEditor );
scrollPane1.setRowHeaderView(linenumber1);
paneltext.add(scrollPane1);
panel1.add(panellabel);
panel1.add(paneltext);
panel1.add(panelbutton);
container.add(panel1);
jbtSave.addActionListener (
new ActionListener() {
public void actionPerformed (ActionEvent en) {
savefile();
}
}
);
} // end init
public void actionPerformed(ActionEvent ae)
{
} // End action perform
public void itemStateChanged(ItemEvent ie)
{
} // End item state changed
public void savefile()
{
String filename = namefile.getText();
String teditor = textEditor.getText();
URL servletUrl = null;
URLConnection con;
String servletName = http://localhost:8080/examples/servlet/ServletIde;;
try
{
servletUrl = new URL(servletName + ?filename=+filename+teditor=+teditor);
con = servletUrl.openConnection();
con.setUseCaches(false);
BufferedReader buf = new BufferedReader(new
InputStreamReader(con.getInputStream()));
}
catch(Exception e)
{
System.out.println(Exception caught...+e);
}
} // end savefile
} // end class AppletSave
The servlet is as follows:
import java.io.*;
import java.text.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class ServletSave extends HttpServlet {
public void doGet(HttpServletRequest req, HttpServletResponse res) throws
IOException, ServletException
{
HttpSession session = req.getSession();
PrintWriter out = res.getWriter();
out.println(html);
out.println(head);
out.println(titleLogin/title);
out.println(centerh2Save File To Server/h2);
out.println(applet width=500 height=400);
out.println(name=\AppletSave\);
out.println(codebase=\/\);
out.println(code=\AppletSave\);
out.println(param name=\servlet\ value=\ +
req.getRequestURI() + \);
out.println(param name=\id\ value=\ +
session.getId() + \);
out.println(/applet);
out.println(/center/body/html);
String name = req.getParameter(filename);
String content = req.getParameter(teditor);
String nameFile = C:/temp/+name;
FileWriter resultsFile = new FileWriter(nameFile,true);
PrintWriter toFile = new PrintWriter(resultsFile,true);
toFile.println(content);
toFile.close();
}
}
Yours Sincerely,
TEH NORANIS
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Cannot save file to Apache Tomcat server
Dear all,
I really hope that someone can help me out. I have an error-free applet and
servlet. When I type http://localhost:8080/examples/servlet/ServletIdea, an
applet is loaded. From the applet, I type the file name in a text field and the
file content in a text area. I want the file content to be saved in the
specified file name. The problem is that the file cannot be saved to the
server. I put ServletIdea.java in
C:/jakarta-tomcat-4.1.31/webapps/examples/WEB-INF/classes. I put IdeaTool.java
in C:/jakarta-tomcat-4.1.31/webapps/ROOT. The programs are as follows:
//ServletIdea.java
import java.io.*;
import java.text.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class ServletIdea extends HttpServlet {
public void doGet(HttpServletRequest req, HttpServletResponse res) throws
IOException, ServletException
{
HttpSession session = req.getSession();
PrintWriter out = res.getWriter();
out.println(html);
out.println(head);
out.println(titleLogin/title);
out.println(centerh2Servlet Idea/h2);
out.println(applet width=500 height=400);
out.println(name=\IdeaTool\);
out.println(codebase=\/\);
out.println(code=\IdeaTool\);
out.println(param name=\servlet\ value=\ +
req.getRequestURI() + \);
out.println(param name=\id\ value=\ +
session.getId() + \);
out.println(/applet);
out.println(/center/body/html);
}
public void doPost(HttpServletRequest req, HttpServletResponse res) throws
IOException, ServletException
{
res.setContentType(text/html);
DataInputStream in = new DataInputStream(req.getInputStream());
PrintWriter out = res.getWriter();
String filename = in.readUTF();
String filecontent = in.readUTF();
if (filename != null || filecontent != null) {
out.println(filename=+filename+PNext);
out.println(filecontent=+filecontent);
}
else{
out.println(requestparams.no-params);
}
out.println(P);
try {
PrintWriter outFile = new PrintWriter(new OutputStreamWriter(new
FileOutputStream(C://+filename)));
outFile.println(filecontent);
outFile.close();
}
catch (FileNotFoundException e){
out.println(Cannot open file +filename);
}
catch (IOException e) {
out.println(write data file IO exception);
}
out.close();
}
}
// IdeaTool.java
// Java core pakages
import java.awt.*;
import java.awt.event.*;
// Java extension packages
import javax.swing.*;
import javax.swing.JApplet;
import javax.swing.text.BadLocationException;
import java.net.*;
import java.io.*;
import java.util.*;
public class IdeaTool extends JApplet implements ItemListener, ActionListener
{
JPanel panel1, panellabel, panelbutton, paneltext;
JTextField namefile;
JButton jbtSave;
JTextArea textarea1;
JLabel labelfile;
String line;
String codeBase, servlet, sessionId;
public void init() {
codeBase = + getCodeBase();
servlet = getParameter(servlet);
if (servlet != null)
{
if (servlet.startsWith(/) codeBase.endsWith(/))
{
codeBase = codeBase.substring(0, codeBase.length() - 1);
}
}
sessionId = getParameter(id);
Container container = getContentPane();
namefile = new JTextField(20);
panel1 = new JPanel();
panellabel = new JPanel();
panelbutton = new JPanel();
paneltext = new JPanel();
labelfile = new JLabel(File Name);
panellabel.setLayout(new FlowLayout(FlowLayout.LEFT,90,0));
panellabel.add(labelfile);
panellabel.add(namefile);
panelbutton.setLayout(new GridLayout(1,1));
panelbutton.add(jbtSave = new JButton(Save));
jbtSave.addActionListener (
new ActionListener() {
public void actionPerformed (ActionEvent en) {
savefile();
}
}
);
textarea1 = new JTextArea(18,63);
textarea1.setFont(new Font(monospaced,Font.PLAIN,12));
JScrollPane scrollPane1 = new JScrollPane(textarea1);
Linenumber linenumber1 = new Linenumber ( textarea1 );
scrollPane1.setRowHeaderView(linenumber1);
paneltext.add(scrollPane1);
panel1.add(panelbutton);
panel1.add(panellabel);
panel1.add(paneltext);
container.add(panel1);
} // end init
public void actionPerformed(ActionEvent ae) {
} // End action perform
public void itemStateChanged(ItemEvent ie) {
} // End item state changed
public void savefile(){
String filename = namefile.getText();
String filecontent = textarea1.getText();
try
{
java.net.URL url = new java.net.URL(codeBase + servlet);
java.net.URLConnection con = url.openConnection();
con.setUseCaches(false);
con.setDoOutput(true);
con.setDoInput(true);
ByteArrayOutputStream byteOut = new ByteArrayOutputStream();
DataOutputStream out = new DataOutputStream(byteOut);
Applet to JSP communication
Dear all, How can my applet communicate with JSP using POST and GET? I have an applet with a Save button to save data in a file at Apache Tomcat server. The applet also contain JTextField to input the file name and JTextArea to input the text to be saved. How can the applet and JSP communicate? Can anyone please e-mail me the source code? Thank you so much. Yours Sincerely, TEH NORANIS - Don't get soaked. Take a quick peak at the forecast with theYahoo! Search weather shortcut.
Servlet/JSP source code to save data in a file
Dear all, Does anyone have the Servlet/JSP source code to save data in a file that will be located in the server? I need the source code very urgently. I have my own version but it is not working. Please help me! Thank you. Yours Sincerely, TEH NORANIS - Expecting? Get great news right away with email Auto-Check. Try the Yahoo! Mail Beta.
Why applets cannot link to next page in a servlet?
Dear All, I put my applet and servlet in a directory (using package statement in the java file) which I defined. When I called the servlet in a web browser, the first page of the applet was displayed. But when I login a valid user name and password, the applet cannot link to the next page which is defined in a servlet. Then, without defining the applet and servlet using package, I tried to put the applet in: C:\jakarta-tomcat-4.1.31\webapps\ROOT\ and the servlet in: C:\jakarta-tomcat-4.1.31\webapps\examples\WEB-INF\classes and it works fine! Can anyone please tell me why the applet CANNOT link to the next page if I'm using package but it CAN link to the next page without using package? How can I fix this problem because I really want to organize my files using package. Please help me! Thank you. Yours Sincerely, TEH NORANIS Now that's room service! Choose from over 150,000 hotels in 45,000 destinations on Yahoo! Travel to find your fit. http://farechase.yahoo.com/promo-generic-14795097 - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Applet does not send request to servlet
user = username.getText();
String pw = password.getText();
boolean valid = false;
try
{
valid = validate(user, pw);
}
catch (Exception ex)
{
ex.printStackTrace();
}
if (!valid)
{
message.setText(Invalid user - please try again);
}
else
{
try
{
URL url = new URL(nextDoc);
System.out.println(showing + url);
getAppletContext().showDocument(url);
}
catch (Exception ex)
{
message.setText(Invalid document: + nextDoc);
ex.printStackTrace();
}
}
}
}
return false;
}
protected boolean validate(String user, String pw) throws Exception
{
boolean valid = false;
java.net.URL url = new java.net.URL(codeBase + servlet);
java.net.URLConnection con = url.openConnection();
con.setUseCaches(false);
con.setDoOutput(true);
con.setDoInput(true);
ByteArrayOutputStream byteOut = new ByteArrayOutputStream();
DataOutputStream out = new DataOutputStream(byteOut);
out.writeUTF(sessionId);
out.writeUTF(user);
out.writeUTF(pw);
out.flush();
byte buf[] = byteOut.toByteArray();
con.setRequestProperty(Content-type, application/octet-stream);
con.setRequestProperty(Content-length, + buf.length);
DataOutputStream dataOut = new DataOutputStream(con.getOutputStream());
dataOut.write(buf);
dataOut.flush();
dataOut.close();
DataInputStream in = new DataInputStream(con.getInputStream());
valid = in.readBoolean();
System.out.println(valid user= + valid);
if (valid)
{
nextDoc = in.readUTF();
System.out.println(next document= + nextDoc);
}
in.close();
return valid;
}
}
TEH NORANIS
Zack Grafton [EMAIL PROTECTED] wrote:
I would have to agree with the attachment capability of this mailing list.
Zack
Andre Prasetya wrote:
i think attachments are disabled...
On 1/17/07, Teh Noranis Mohd Aris wrote:
Hi,
I already solve the problem of loading my applet in the web browser.
Thank
you to all. Now, I'm having the problem to send request from the
applet to
the servlet. Attached is the AppletLogin.java (the servlet which I
put in
package myapp) and LoginApplet.java (the applet which I put in package
myapp.applets). I use http://localhost:8080/myapp/AppletLogin to access
the applet. The same username and password input should link to
Welcome to
our site, More cool stuff coming soon but I got the Invalid user -
please try again message. I tried to modify the codeBase variable in
the
init() method of the applet but could not link to the next page. I think
that the applet cannot access the servlet in package myapp. The attached
programs are only short programs in a book. I just want to organize the
programs in my own directory. Does anyone have any other ideas why
this is
happening? Please help me! Thank you in advance.
Yours Sincerely,
TEH NORANIS
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Re: Applet does not send request to servlet
Hello,
I've been working out the applet program since last
night but still could not get it correct. I think that
the codeBase variable path that was initialised in the
applet program is not correct. I put the
LoginApplet.class in
C:\jakarta-tomcat-4.1.31\webapps\myapp\applets. It's
just a matter of writing the codeBase variable the
correct way. Can anyone please give me any
suggestions? Please Help Me! Hoping for a reply. Thank
you.
TEH NORANIS
--- Teh Noranis Mohd Aris [EMAIL PROTECTED]
wrote:
Hi,
I'm sorry, I didn't realize about the attachment
capability for this mailing list. However here are
the programs that I attached previously. Hope
someone can help me out. Thank you.
1. THE SERVLET PROGRAM:
package myapp;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Hashtable;
public class AppletLogin extends HttpServlet
{
public static String USER_KEY =
ServletLogin.user;
static Hashtable crossRef = new Hashtable();
public void doGet(HttpServletRequest req,
HttpServletResponse resp)
throws ServletException, java.io.IOException
{
resp.setContentType(text/html);
PrintWriter out = resp.getWriter();
resp.setHeader(Expires, Tues, 01 Jan 1980
00:00:00 GMT);
HttpSession session = req.getSession();
String user = (String)
session.getAttribute(USER_KEY);
if (user == null)
{
user = (String)
crossRef.get(session.getId());
if (user != null)
{
session.setAttribute(USER_KEY, user);
crossRef.remove(session.getId());
}
}
if (user == null)
{
login(out, req, resp);
return;
}
out.println(html);
out.println(head);
out.println(titleWelcome/title);
out.println(/head);
out.println(body);
out.println(centerh2Welcome to our
site!/h2);
out.println(br);
out.println(More cool stuff coming soon...);
out.println(/center);
out.println(/body);
out.println(/html);
out.flush();
}
public void doPost(HttpServletRequest req,
HttpServletResponse resp)
throws ServletException, java.io.IOException
{
DataInputStream in = new
DataInputStream(req.getInputStream());
resp.setContentType(application/octet-stream);
ByteArrayOutputStream byteOut = new
ByteArrayOutputStream();
DataOutputStream out = new
DataOutputStream(byteOut);
String sessionId = in.readUTF();
String user = in.readUTF();
String password = in.readUTF();
if (!validUser(user, password))
{
out.writeBoolean(false);
}
else
{
crossRef.put(sessionId, user);
out.writeBoolean(true);
String nextPage = req.getScheme() + :// +
req.getServerName() + : +
req.getServerPort() +
req.getRequestURI();
out.writeUTF(nextPage);
}
out.flush();
byte[] buf = byteOut.toByteArray();
resp.setContentLength(buf.length);
ServletOutputStream servletOut =
resp.getOutputStream();
servletOut.write(buf);
servletOut.close();
}
protected void login (PrintWriter out,
HttpServletRequest req,
HttpServletResponse resp)
throws java.io.IOException
{
HttpSession session = req.getSession();
out.println(html);
out.println(head);
out.println(titleLogin/title);
out.println(centerh2Welcome! Please
login/h2);
out.println(applet width=300 height=120);
out.println(name=\LoginApplet\);
out.println(codebase=\ + req.getContextPath()
+ /applets/\);
out.println(code=\webide.applets.LoginApplet\);
out.println(param name=\servlet\ value=\ +
req.getRequestURI() + \);
out.println(param name=\id\ value=\ +
session.getId() + \);
out.println(/applet);
out.println(/center/body/html);
}
protected boolean validUser(String username,
String password)
{
boolean valid = false;
if ((username != null) (username.length()
0))
{
valid = username.equals(password);
}
return valid;
}
}
2. THE APPLET PROGRAM:
package myapp.applets;
import java.applet.*;
import java.awt.*;
import java.io.*;
import java.net.*;
public class LoginApplet extends Applet
{
TextField username;
TextField password;
Label message;
Button login;
String codeBase;
String servlet;
String nextDoc;
String sessionId;
public void init()
{
codeBase = + getCodeBase();
servlet = getParameter(servlet);
if (servlet != null)
{
if (servlet.startsWith(/)
codeBase.endsWith(/))
{
codeBase =
codeBase.substring(0
Re: Cannot load applet on web browser
Thank you for the reply. I already created the LoginApplet.html and embed the LoginApplet.class. Where should I put the files in the tomcat directory? Where should I put the JSP files? How about the WEB-INF file? Please help me! I'm really short of time! Thank you so much. Yours Sincerely, TEH NORANIS Zack Grafton [EMAIL PROTECTED] wrote: I totally agree with Vacuum Joe on his point at getting familiar with Tomcat. As well, I believe the applet tag is considered deprecated with most of the newer versions of Java. There is a program in the bin folder under your Java installation directory called HtmlConverter. This program will help you replace the applet tag with the appropriate object tags. Good Luck! Zack - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - Don't pick lemons. See all the new 2007 cars at Yahoo! Autos.
Re: Cannot load applet on web browser
Yes, you are correct Mr. David Smith, I was just about to tell this matter. I did not put the LoginApplet.class in the WEB-INF. I choose to use html in the servlet because I would like to upgrade the previous system that was written in cgi. For the moment, I plan to use servlet and will upgrade to JSP later. I'm really stressed developing programs using Tomcat because I'm running out of time! I very much hope that tomcat users can help me out. Thank you so much, David. I will try out your suggestion tomorrow because I'm having a headache now. I will inform you tomorrow. Thank you also to all who contributed. Yours Sincerely, TEH NORANIS David Smith [EMAIL PROTECTED] wrote: I reread the original post and I don't think you are all that far off in your setup. I'll recap a little here just to be sure I'm reading it right: Servlet is located at WEB-INF/classes/AppletLogin.class (I would recommend this be in an official package) Applet is located at myapp/applets/LoginApplet.class (note for all that are following this thread, this is not in the WEB-INF dir) Here's the result of your servlet code: Welcome! Please login name=LoginApplet codebase=/applets code=LoginApplet I notice straight off there is no closing head tag or opening body tag. These are big html errors and your lucky the browser is even attempting to display it as well as it has. Additionally, I believe your applet params are incorrect resulting in your browser not being able to retreive the applet. Consider composing the code and codebase attribute as: out.println( code=\LoginApplet.class\ ) ; out.println( codebase=\ + req.getContextPath() + /applets ) ; --David Teh Noranis Mohd Aris wrote: Thank you for the reply. I already created the LoginApplet.html and embed the LoginApplet.class. Where should I put the files in the tomcat directory? Where should I put the JSP files? How about the WEB-INF file? Please help me! I'm really short of time! Thank you so much. Yours Sincerely, TEH NORANIS Zack Grafton wrote: I totally agree with Vacuum Joe on his point at getting familiar with Tomcat. As well, I believe the applet tag is considered deprecated with most of the newer versions of Java. There is a program in the bin folder under your Java installation directory called HtmlConverter. This program will help you replace the applet tag with the appropriate object tags. Good Luck! Zack - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - Don't pick lemons. See all the new 2007 cars at Yahoo! Autos. - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - Finding fabulous fares is fun. Let Yahoo! FareChase search your favorite travel sites to find flight and hotel bargains.
Applet does not send request to servlet
Hi, I already solve the problem of loading my applet in the web browser. Thank you to all. Now, I'm having the problem to send request from the applet to the servlet. Attached is the AppletLogin.java (the servlet which I put in package myapp) and LoginApplet.java (the applet which I put in package myapp.applets). I use http://localhost:8080/myapp/AppletLogin to access the applet. The same username and password input should link to Welcome to our site, More cool stuff coming soon but I got the Invalid user - please try again message. I tried to modify the codeBase variable in the init() method of the applet but could not link to the next page. I think that the applet cannot access the servlet in package myapp. The attached programs are only short programs in a book. I just want to organize the programs in my own directory. Does anyone have any other ideas why this is happening? Please help me! Thank you in advance. Yours Sincerely, TEH NORANIS - Need a quick answer? Get one in minutes from people who know. Ask your question on Yahoo! Answers.- To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Cannot load applet on web browser
Hi, I have created programs under the following directory: servlet program: jakarta-tomcat-4.1.31/webapps/myapp/WEB-INF/classes/AppletLogin.class applet program: jakarta-tomcat-4.1.31/webapps/myapp/applets/LoginApplet.class deployment descriptor: myapp/WEB-INF/web.xml The servlet creates an HTML page that will present an applet that gathers the username and password. This servlet will also validate the input and redirect the applet as necessary. Following is part of the servlet code: . . . out.println(html); out.println(head); out.println(titleLogin/title); out.println(centerh2Welcome! Please login/h2); out.println(applet width=500 height=500); out.println(name=\LoginApplet\); out.println(codebase=\/applets\); out.println(code=\LoginApplet\); out.println(param name=\servlet\ value=\ + req.getRequestURI() + \); out.println(param name=\id\ value=\ + session.getId() + \); out.println(/applet); out.println(/center/body/html); . . . The text Welcome! Please login appears in the web browser but the applet is not loaded in the web browser giving a message Applet LoginApplet notinited. I think that there is something wrong with the way I write the codebase and code statement as above. I tried many times modifying the codebase and code statement but still the LoginApplet cannot be loaded. Can anyone tell me the correct way to write the codebase and code statement? Please help me! Thank you. Yours Sincerely, TEH NORANIS - 8:00? 8:25? 8:40? Find a flick in no time with theYahoo! Search movie showtime shortcut.
Problem with Applet-to-Servlet Programs
Hi, I'm doing applet-to-servlet programs. I've put the applet in directory c:\jakarta-tomcat-4.1.31\webapps\ROOT\application\LoginApplet. I've put the servlet in directory c:\jakarta-tomcat-4.1.31\webapps\application\WEB-INF\classes\AppletLogin. When I run it in the web browser using http://localhost:8080/application/servlet/AppletLogin, I got the following error: HTTP Status 404 - application/AppletLogin type Status report message /application/AppletLogin description The requested resource (/application/AppletLogin) is not available. Where did it go wrong? How can I solve the problem? I've attached the applet and servlet programs. Please help me! Thank you. Yours Sincerely, TEH NORANIS - Never Miss an Email Stay connected with Yahoo! Mail on your mobile. Get started!- To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Please Help!Tomcat Not Running on Linux Fedora
Dear All, I'm very new to Linux Fedora and not quite familiar to the commands. I'm using Fedora Core 2.6.9-1.667. I've already installed j2sdk1.4.2_10 and jakarta-tomcat-4.1.31 on my computer. Unfortunately, when I tried to execute Tomcat in the bin directory by typing ./startup.sh the following message appeared: The JAVA_HOME environment variable is not defined This environment variable is needed to run this program I've used the vi .bash_profile command to set the PATH, JAVA_HOME and CATALINA_HOME as follows: # .bash_profile . . . PATH=$PATH:$HOME/bin;/j2sdk1.4.2_10/bin;/jakarta-tomcat-4.1.31/common/lib/servlet.jar JAVA_HOME=/j2sdk1.4.2_10 CATALINA_HOME=/jakarta-tomcat-4.1.31 . . . I tried to run a java program using javac and it worked, though I'm not sure how to modify the system PATH variable. I tried to type echo $PATH but did not find the system PATH variable. Are my steps correct? Did I miss anything? Can anyone please explain to me in the most simple way how to solve the problem? To those who have already made Tomcat run on Linux Fedora, please help me! Waiting to hear from you soon. Thank you. Yours Sincerely, TEH - Access over 1 million songs - Yahoo! Music Unlimited Try it today.
Re: Please Help! Error in using Packages
Actually, it's only a small matter. I accessed the url from the browser by not following the correct path as in the url-pattern in web.xml file. That's why I got the error message 404 where the path is not available. TEH --- KJ R [EMAIL PROTECTED] wrote: Usually, when you solve a problem, it's helpful to post what the solution was, even if it was something silly, it could possibly help someone else. K --- Teh Noranis Mohd Aris [EMAIL PROTECTED] wrote: Dear all, I've already solve the problem. Thanks to all who had contributed. TEH --- Prasad [EMAIL PROTECTED] wrote: Teh, The web.xml looks fine to me. Can you confirm that you war file is packaged correctly i.e its created with proper packages structure and dir/file names. Also, I was wondering why are you being asked to (explicitly) create a context element in server.xml. Is it a TC v4.x requirement ? I have used TC 3,4 and 5 but never was I required to explicitly create a context entry in server.xml for any webapp. I used more of a traditional way of dropping a war file into webapps/ and re-starting the container and it has been working fine for me so far. Experts, any thoughts on this one ? Teh, if you are sure that the deployed WAR is sane then we should wait for experts to provide an answer. -Prasad. Teh Noranis Mohd Aris wrote: The web.xml looks like this: ?xml version=1.0 encoding=ISO-8859-1? !DOCTYPE web-app PUBLIC -//Sun Microsystems, Inc.//DTD Web Application 2.3//EN http://java.sun.com/j2ee/dtds/web-app_2_3.dtd; web-app servlet servlet-nameMyFirstServlet/servlet-name servlet-classcom.wrox.projsp.ch03.myfirstwebapp.MyFirstServlet/servlet-class /servlet servlet-mapping servlet-nameMyFirstServlet/servlet-name url-pattern /MyFirstServlet /url-pattern /servlet-mapping /web-app I placed the web.xml in c:\jakarta-tomcat-4.1.31\webapps\ch03\WEB-INF directory. How about the server.xml file in c:\jakarta-tomcat-4.1.31\conf directory? The original file looks like this: . . . !-- Tomcat Examples Context -- Context path=/examples docBase=examples debug=0 reloadable=true crossContext=true Logger className=org.apache.catalina.logger.FileLogger prefix=localhost_examples_log. suffix=.txt timestamp=true/ Ejb name=ejb/EmplRecord type=Entity home=com.wombat.empl.EmployeeRecordHome remote=com.wombat.empl.EmployeeRecord/ . . . Should I replace Context path=/examples to Context path=ch03 and docBase=examples to docBase=myfirstwebapp (the war file for myfirstwebapp in the c:\jakarta-tomcat-4.1.31\webapps\ch03 directory)? Thanks. TEH --- Prasad [EMAIL PROTECTED] wrote: Can you post your web.xml. I think I can help you with this but only after looking at your web.xml. I think the problem is with servlet and servlet-mapping in your web.xml. Moreover as David said, you can find all the information in the Docs. -Prasad. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] __ === message truncated === __ Yahoo! DSL Something to write home about. Just $16.99/mo. or less. dsl.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Please Help! Error in using Packages
The web.xml looks like this: ?xml version=1.0 encoding=ISO-8859-1? !DOCTYPE web-app PUBLIC -//Sun Microsystems, Inc.//DTD Web Application 2.3//EN http://java.sun.com/j2ee/dtds/web-app_2_3.dtd; web-app servlet servlet-nameMyFirstServlet/servlet-name servlet-classcom.wrox.projsp.ch03.myfirstwebapp.MyFirstServlet/servlet-class /servlet servlet-mapping servlet-nameMyFirstServlet/servlet-name url-pattern /MyFirstServlet /url-pattern /servlet-mapping /web-app I placed the web.xml in c:\jakarta-tomcat-4.1.31\webapps\ch03\WEB-INF directory. How about the server.xml file in c:\jakarta-tomcat-4.1.31\conf directory? The original file looks like this: . . . !-- Tomcat Examples Context -- Context path=/examples docBase=examples debug=0 reloadable=true crossContext=true Logger className=org.apache.catalina.logger.FileLogger prefix=localhost_examples_log. suffix=.txt timestamp=true/ Ejb name=ejb/EmplRecord type=Entity home=com.wombat.empl.EmployeeRecordHome remote=com.wombat.empl.EmployeeRecord/ . . . Should I replace Context path=/examples to Context path=ch03 and docBase=examples to docBase=myfirstwebapp (the war file for myfirstwebapp in the c:\jakarta-tomcat-4.1.31\webapps\ch03 directory)? Thanks. TEH --- Prasad [EMAIL PROTECTED] wrote: Can you post your web.xml. I think I can help you with this but only after looking at your web.xml. I think the problem is with servlet and servlet-mapping in your web.xml. Moreover as David said, you can find all the information in the Docs. -Prasad. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Please Help! Error in using Packages
Hi, I'm learning to use packages from a book example to create my own servlet instead of putting the code in the examples webapp. However the following error occurs: HTTP Status 404 - /ch03/servlet/com.wrox.projsp.ch03.myfirstwebapp.MyFirstServlet type Status report message /ch03/servlet/com.wrox.projsp.ch03.myfirstwebapp.MyFirstServlet description The requested resource (/ch03/servlet/com.wrox.projsp.ch03.myfirstwebapp.MyFirstServlet) is not available. Apache Tomcat/4.1.31 How can I fix the error? I'm sure that the servlet is in the correct directory and I've put the web.xml in the WEB-INF directory. Did I miss anything? Please help. Thanks. Yours Sincerely, TEH __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Please Help Me
Dear All, I've installed tomcat version 4.1.31 and tried to start tomcat but the Tomcat window displays error messages: Catalina.stop: java.net.ConnectException: Connection refused: connect java.net.ConnectException . . . How can I fix this problem? Please help me. Thank you. __ Start your day with Yahoo! - Make it your home page! http://www.yahoo.com/r/hs - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Please Help Me
Dear All, I've installed tomcat version 4.1.31 and tried to start tomcat but the Tomcat window displays error messages: Catalina.stop: java.net.ConnectException: Connection refused: connect java.net.ConnectException . . . How can I fix this problem? Please help me. Thank you. __ Start your day with Yahoo! - Make it your home page! http://www.yahoo.com/r/hs - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Problem Solved
Dear All, For those who replied, thank you so much. I've already solved the problem. I think that I've downloaded the wrong file. I've uninstalled tomcat and installed it again and it works. Thank you again. Regards, Teh __ Start your day with Yahoo! - Make it your home page! http://www.yahoo.com/r/hs - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
