Re: Servlets vs EJB performance
wtngoh wrote: > > Hi, > > I am not sure about the performance comparison. Is there any > real application running on the web to show how nice is the EJB in terms of > performance? Any recommendations as to where I can find such comparisions? > I don't know if you can call it a 'preformance issue', but AFIK, EJB is slower than servlets/jsp simply because it's a transactional framework for mission critical Enterprise Applications. jsp/servlets is not. If you're going to need transactions, go for EJB. If you don't need transactions, go for JSP/Servlets. Sven -- == Sven van 't Veer http://www.cachoeiro.net Java Developer [EMAIL PROTECTED] == ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
Re: Multiple submits within a form
sunil mallya wrote: > > Hello all, >I have a form . In that form there is a link > and a submit button. Now depending on what i click, it > should take me to two different servlets . Now is that > possible within a form? if so how ? > use Javascript:onPost() sven -- == Sven van 't Veer http://www.cachoeiro.net Java Developer [EMAIL PROTECTED] == ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
Re: Strange Problem with request dispatching...
"Shehrawat, Rishi" wrote: > > is this supposed to happen ?? is the thread killed right after the client > request is handled.. or is it supposed to come back to some kind of a thread > pool maintained by the server.. > Of course it is supposed to happen. If you call a method (methodB) from within a method (methodA), the code after the call to methodB is executed and methodB returns, execution within methodA will continue, ulnless you call return or an exception occurs withing methodB. This is ALWAYS true. Servlets are no different. sven -- == Sven van 't Veer http://www.cachoeiro.net Java Developer [EMAIL PROTECTED] == ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
Re: calling member functions of servlet...
"Rajesh R.Basawa" wrote: > > Hi all, > I have basic question regarding servlets.I have a servlet which has some member >functions apart from doGet and doPost.How could I call these methods from the other >servlet.I don't want to load the servlet on my own .It should be loaded as normal >servlet from servlet engine. What you describe is not a good design. Migrate these methods to a separate class, instantiate the class and call the methods sven -- == Sven van 't Veer http://www.cachoeiro.net Java Developer [EMAIL PROTECTED] == ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
Re: Parameter Count
Amar Das wrote:
>
> Let consider I am have the following URL
> http://./servlet/MakeList?ID1=STN001&ID2=STN002 etc.
>
> String req1=request.getParameter("ID1");
> String req2=request.getParameter("ID2"):
>
> But I need some help, how to handle things when I do not know how many
> parameters passed.
Take a look at the docs. There are some methods like getParameterNames()
and getParameters().
sven
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Re: Number of Records
Andrew Wallace wrote:
> But for those of you using JDBC 2.0 how about:
>
> if (rs.next()) {
> rs.afterLast();
> rs.previous();
> noOfRecords = rs.getRow();
> }
and in that case why not:
if (rs.next()) {
rs.Last();
noOfRecords = rs.getRow();
}
sven
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Re: Number of Records
Silvia Gaspar wrote: > > What function give us the number of records retrieved by a query? > I'm using JDBC. > SELECT COUNT(*) FROM TABLE sven -- == Sven van 't Veer http://www.cachoeiro.net Java Developer [EMAIL PROTECTED] _/_ The answer / \ to the ultimate questionnnn|. .|nnn 42 =U ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
Re: JSP in iPlanet 4.1
Deepu L K wrote: > [09/Aug/2000:00:35:34] info (15290): Internal Info: loading servlet > /Check.jsp > [09/Aug/2000:00:35:35] warning (15290): Internal error: Unexpected Java > exception thrown (java.lang.NoClassDefFoundError: > sun/tools/javac/Main,sun/tools/javac/Main), stack: > java.lang.NoClassDefFoundError: sun/tools/javac/Main I don't know much about iPlanet, but the error you're getting is very common in all app servers and JSP engines. It means the engine cannot fing tools.jar (javac) to compile the jsp's. Look in the docs to make sure how to resolve this in iPlanet, but my guess is to copy /path/to/jdk/lib/tools.jar into the iplanet/lib/ directory. sven -- == Sven van 't Veer http://www.cachoeiro.net Java Developer [EMAIL PROTECTED] _/_ The answer / \ to the ultimate questionnnn|. .|nnn 42 =U ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
Re: database Search with the servlets and sql.
Kaushik wrote: > > database Search with the servlets. > Can you please sort my issue. > > 1. what method is there to count the no. of records in a resultset( > direct method with out looping). Depends on the driver if it's JDBC 1.0, you can't. In JDBC 2 you can: resultSet.last(); resultSet.getRow(); In any case you can do "SELECT COUNT(*) FROM MYTABLE" > 2. what is the syntax of 'like' in the below line. > >String str1="select * from TableInd where Detail like '"+%kw[0]%+"'"; > > I want to check the 'Detail' field with the workds matching 'kw[0]'; > the above is giving error. > Jep, you just can't do that. Should be like: Detail like '%" + kw[0] + "%' [or Detail like '%" + kw[0] + "%'] etc. sven -- == Sven van 't Veer http://www.cachoeiro.net Java Developer [EMAIL PROTECTED] _/_ The answer / \ to the ultimate questionnnn|. .|nnn 42 =U ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
Re: Interbase BLOB data type
Giovanni Azúa García wrote:
>
> Please could anyone at least explain how to show a BLOB field?
>
> out.println(queryDataSet.Format("TEXTDOC"));
>
A BLOB is bynary data, it can't be formated like that. You get it from
the resultset using getBinaryStrean or getByteStream.
sven
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Re: getRuntime() java.lang.IllegalThreadStateException: process hasnot exited
Paolo Gallo wrote:
>
> process = runtime.exec(cmd);
> int i = process.exitValue();
> out.println("Executes:"+cmd);
>}
> catch(IllegalThreadStateException ex) {
> ex.printStackTrace(out);
>
before you get process.exitValue(), add a line process.waitFor();
sven
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Re: Empty string bug using String Tokenizer
Harkishin Nachnani wrote: > > I have a string : "1,2,,4" > I am using String Tokenizer class with the delimiter "," > I should get 4 strings : "1""2"" " "4" You probably would get this when you have "1,2, ,4" but probably not with "1,2,,4" since there is no token to return. > The 3rd String should be an empty string. But the String Tokenizer class > gives me only 3 strings without the empty string. That's because nextElement should return null in the case of ,, sven -- == Sven van 't Veer http://www.cachoeiro.net Java Developer [EMAIL PROTECTED] _/_ The answer / \ to the ultimate questionnnn|. .|nnn 42 =U ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
Re: SQL Web interface servlet
> Does anyone have any ideas where I could find some code to start with, or > have a good > resource for locating some? > There is a java MySql admin tool. Look at the mysql site -- ====== Sven van 't Veer http://www.cachoeiro.net Java Developer [EMAIL PROTECTED] _/_ The answer / \ to the ultimate questionnnn|. .|nnn 42 =U ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
Re: Servlet calling servlet (or nesting servlets).
"Hunter, Roger" wrote: > > I need some help calling a servlet from a servlet. > > To call the common servlet I then do: > > Object o = myServletContext.getAttribute(commonServlet.KEY); > commonServlet varObject = (commonServlet) o; > varObject.doAction(request,res); > > This way seems a bit messy. The common servlet must be called once before it > can be used to run init(). For what you seem to be doing J2EE (jsp/servlet & EJB) seems more apropriate. The sole purpose in the life of a servlet should be rendering the user interface. Your business logic should not be inside a servlet, it shoulde be inside other classes that provide the information to the servlet on what exactly to render to the client. In your case you will need statefull session beans or maybe entity beans sto hold the userinformation. sven -- == Sven van 't Veer http://www.cachoeiro.net Java Developer [EMAIL PROTECTED] _/_ The answer / \ to the ultimate questionnnn|. .|nnn 42 =U ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
Re: help me about web servers
Kerem ÖKTEM wrote: > > hi, > please god help me. and you guys too. > I am working on a project consisting of servlets and i want to demonstrate > that to myself whether it is working or not in my own computer. I tyied some > servlers > Apache Web Server > Apache Jserv 1.1.2 together > and the complexitiy to configure it almost killed me. You could try jakarta-tomcat as a stand alone selvlet/jsp container. sven -- == Sven van 't Veer http://www.cachoeiro.net Java Developer [EMAIL PROTECTED] _/_ The answer / \ to the ultimate questionnnn|. .|nnn 42 =U ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
Re: IDE
Alec Belsky wrote: > > Hi all, > I am writing some servlets and was wondering what environments people > have had the best success with. I was using Visual J++, but thought that > was the wrong was to go. What is the best package for making servlets. > Thanks in advance > I like forte (sun) sven -- == Sven van 't Veer http://www.cachoeiro.net Java Developer [EMAIL PROTECTED] _/_ The answer / \ to the ultimate questionnnn|. .|nnn 42 =U ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
Width and Height of an Image
I'm storing images in a database using o'reilly MultipartRequest. I'm encountering one small problem, I would like to know both height and width of the image when storing it in the DB. Is there an easy way to do this? sven -- == Sven van 't Veer http://www.cachoeiro.net Java Developer [EMAIL PROTECTED] _/_ The answer / \ to the ultimate questionnnn|. .|nnn 42 =U ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
Re: iPlanet creating image servlet response
Nick McKenna wrote:
>
> Dear All
>
> I can't get iPlanet to create an instance of the class Image. I am trying to
> create a servlet that outputs a gif (ACME encoder) image.
>
> The code is:
>
> // Create the image
> Frame dummy = new Frame();
> image = dummy.createImage(width, height);
>
> The Frame constructor returns a null pointer which causes the
> dummy.createImage line to throw a null pointer exception.
The image is served in a second request (i.e. when the browser sees a new request is made to the server.) You can't use
frames unless you use an applet. The way to do this is to create a
servlet that sever the request for the image:
In this image be sure to set the content type to image/gif or image/jpeg
and stream the image to the browser as a BufferedOutputStream:
BufferedOutputStream out = new
BufferedOutputStream(response.getOutputStream());
response.setContentType(rs.getString(2));
try{
int BytesRead;
byte[] buf = new byte[40];
InputStream dbin = rs.getBinaryStream(1);
while (((BytesRead=dbin.read(buf)) != -1)){
out.write(buf,0,BytesRead);
out.write(BytesRead);
}
out.flush();
sven
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Re: How can i do automatic update
> specific time (let's say Monday at 12:00). > thanx to any help If you're using Linux, use cron to run the job once a week, on monday 12:00 sven -- ====== Sven van 't Veer http://www.cachoeiro.net Java Developer [EMAIL PROTECTED] _/_ The answer / \ to the ultimate questionnnn|. .|nnn 42 =U ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
Re: Servlets and Images
Pavan Sulibhavi wrote: > > Can Somebody enlighten me. What are the advantages of using a servlet to > display an image as compared to using applets for the same purpose. > Pavan > The servlet just shows the image, just like the plain html tag. The applet downloads the applet, starts the jvm and then downloads the image. Lots of clientside overhead. sven ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
Re: Servlet question on passing variables
> How to I get the value of the select box and keep it for later use?
>
> Bill
>
Create a session object and do:
session.putValue("myCheckBox", "someValue");
sven
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Re: Problems in setting up JSDK2.1
"" wrote: > > Hi > > I just installed JDK1.3 and JSDK2.1. I have added the following to the PATH > variable to C:/JDK1.3/bin;C:/JSDK2.1 > and the CLASSPATH to C:/JDK1.3/lib/tools.jar > > But when I compile the servlet code, I get the following error messages > you're missing servlet.jar in your classpath ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
Re: Why Off-Topic posts are wrong (was: Re: [Icon in TextArea orPanel , Canvas etc])
> > Perhaps those who help out the OT posters should stop completely? > Thats what I have done and will continue to do until this abuse stops. > > We, as users of this list, have the right to point out the rules of use on > here. > > Andy Bailey Andy, I agree wholeheartedly with you. However, sometimes it migh be necessary to point out to someone that the soluition he is seeking can be easier resolved using a non servlet solution by for example using js. It might also be that someone new to servlet programming encounters a problem which he thinks is something servlet related but is more related to sys-admin. I dont think it's right to deny these people an answer. I do however agree that JTextArea etc is completely off topic. sven -- --- Sven E. van 't VeerAfiliado Universo Online Gerente Desenvolvimento Brasil Informática e Telecomunicações Ltda. http://www.brvip.com.br http://www.uol.com.br --- ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
Re: default security manager in jserv
Qingyue Shirley Wang wrote: > > > java.lang.IllegalArgumentException: Not writable: > /local/src/ApacheJServ/servlets/access > at oreilly.MultipartRequest.(MultipartRequest.java:145) > > Can anyone please offer some suggestions? Any help would be greatly > appreciated! > > ~Shirley I don't think that this is a java security problem, it's more of a unix security issue. Apache generally runs as user 'nobody'. This user doesn't have write permissions in most directories. You should either use /tmp to do your temporary writing, create a directory owned by nobody (ex /home/nobody) with permissions to write and create files, or you should set ownership of /usr/src/local/ApacheJServ/servlets/access to nobody whith create/write permissions. But this last option is probably a bad idea security wise. I'd go with option1 or 2. sven -- --- Sven E. van 't VeerAfiliado Universo Online Gerente Desenvolvimento Brasil Informática e Telecomunicações Ltda. http://www.brvip.com.br http://www.uol.com.br --- ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
Re: Space Character In URL
"blueads.com" wrote:
>
> - I am running into the same problem as another poster had with spaces in a
> URL. I have tried replacing the space with a '+' sign using the code below.
> This worked fine with Internet Explorer but Not with Netscape.
>
> // String phrase needs '+' signs between spaces for http links.
>
> int length = phrase.length();
> String temp = phrase;
> char linkPhrase[] = temp.toCharArray();
>
> for (int i = 0; i < length; i++) {
> if(linkPhrase[i] == ' '){
> linkPhrase[i] = '+';
> }
> }
>
> - Someone suggested that using %20 works. How would I implement it based on
> the sample code above?
>
I had similar problems and resolved the. as follows:
mystring.replace(' ', '_');
whic worked fine for me
sven
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Re: [Icon in TextArea or Panel , Canvas etc]
QuantumMan wrote: > > chat software is a servlet > Ah, then explain to me how I can use AWT in my dynamic HTML. You're talking sockets and applets sven -- --- Sven E. van 't VeerAfiliado Universo Online Gerente Desenvolvimento Brasil Informática e Telecomunicações Ltda. http://www.brvip.com.br http://www.uol.com.br --- ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
Re: Using forms and calling same Servlet over an over
"Schmidt, Allen J." wrote: > > The mainframe aside, this is a general question of how to handle calling the > same Servlet over and over again and getting deeper into the logic contained > within. Am suggestions are appreciated. An off-list discussion would be > great if anyone is willing. > > Thanks > > Allen Schmidt > Northern VA Community College > I'm not using a mainframe, but have to do a lot of user validation too. I found an article in I think it's java world about single entrypoint servlet applcations. It's interesting reading. The theory behind it is that the servlet application should have one single entry point which handels all requests through separate RequestHandlers. I read the article, developed a small application using this approach and must say it works fine for me. It's much easier to maintain the code. Just take a look at: http://www.javaworld.com/javaworld/jw-09-1999/jw-09-servlet.html Hope this is what you're looking for sven -- --- Sven E. van 't VeerAfiliado Universo Online Gerente Desenvolvimento Brasil Informática e Telecomunicações Ltda. http://www.brvip.com.br http://www.uol.com.br --- ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
Re: FW: Virus Warning There is a new virus titled "I LOVE YOU" orsimilar,being circulated at present which cannot be detected bythe virusshields.
Paul East wrote: > > fortunatley it only affects microsoft mail clients :-) > Actually it don't. I'm subscribed to 5 lists, and more than 80% of my e-mails (200+) deal with this new virus... ouch ;) sven -- --- Sven E. van 't VeerAfiliado Universo Online Gerente Desenvolvimento Brasil Informática e Telecomunicações Ltda. http://www.brvip.com.br http://www.uol.com.br --- ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
Re: JWS && Servlets with Virtual Hosts
> Adam Weigert wrote: > > Does anybody know how to make servlets specific to a certain virtual > host. So that instead of www.companyA.com/MyServlet and > www.companyB.com/MyServlet being accessible by both hosts i want > www.comapnyA.com/MyServlet only to run on www.companyA.com and not on > www.companyB.com if this is possible please tell me so... if not > please tell me... so I don't waste countless hours trying... > It depends a lot on the servlet engine you use. For example in apache with JServ you would add the ApJServMount /blabla /blabla directive inside the tags in the httpd.conf file, instead of inside the JServ.conf file sven -- --- Sven E. van 't VeerAfiliado Universo Online Gerente Desenvolvimento Brasil Informática e Telecomunicações Ltda. http://www.brvip.com.br http://www.uol.com.br --- ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
Re: Package javax.servlet.http not found with JDK1.2.2 and JSDK2.1 onLinux.
"Simonin, Bradley" wrote: > > I have been developing Java Servlets on Windows NT for some time. Now I > need to develop them on Linux. I have jdk1.2.2 and jsdk2.1 installed on my > Linux box in /usr/local. My path has the following: > > ".:/usr/local/jdk1.2.2/bin:/usr/local/jdk1.2.2/lib/tools.jar:/usr/lo > cal/jsdk2.1/servlet.jar:..." > > But I am still getting the infamous javax.servlet.http not found when I > compile a servlet. Does anyone with Linux experience know why? You should edit your .bash_profile and add: CLASSPATH=.:/usr/local/jsdk2.1/servlet.jar: make sure the line: EXPORT PATH etc. includes CLASSPATH sven -- --- Sven E. van 't VeerAfiliado Universo Online Gerente Desenvolvimento Brasil Informática e Telecomunicações Ltda. http://www.brvip.com.br http://www.uol.com.br --- ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
Re: DB2 jdbc driver & servlet.
"Eulogio Robles P." wrote: > > Are you sure that the DB2 driver class files are in your > servlet engine classpath? > Well, I added wrapper.classpath=C:\bla\bla\db2java.zip to jserv.properties I I would expect that to be correct. sven -- --- Sven E. van 't VeerAfiliado Universo Online Gerente Desenvolvimento Brasil Informática e Telecomunicações Ltda. http://www.brvip.com.br http://www.uol.com.br --- ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
DB2 jdbc driver & servlet.
I've just installed DB2 v7.1 and am trying to create a simple servlet to
test the driver. I have some code that works perfectly well as an
application, but a soon as I try the same in a servlet, it does not
work.
public void doGet (HttpServletRequest request, HttpServletResponse
response) throws ServletException, IOException{
PrintStream out = new PrintStream (response.getOutputStream());
Connection conn = null;
Statement stmt = null;
response.setContentType ("text/html");
try {
// register the driver with DriverManager
// The newInstance() call is needed for the sample to work with
// JDK 1.1.1 on OS/2, where the Class.forName() method does not
// run the static initializer. For other JDKs, the newInstance
// call can be omitted.
Class.forName("COM.ibm.db2.jdbc.app.DB2Driver");//.newInstance();
} catch (Exception e) {
e.printStackTrace(out);
}
try {
// Get a DB connection from the Broker
//for (int i = 0 ; i <= 1; i++);
String url = "jdbc:db2:sample";
String user = "like";
String pwd = "duh!";
conn = DriverManager.getConnection(url, user, pwd);
The error give is:
Error code: java.sql.SQLException: No suitable driver
Can anyone tell me what I'm doing wrong here ??
sven
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Re: new to JDBC !!!
Parvez Lanewala wrote:
>
> hi,
>
> i'm not getting why i'm getting this error.
> can someone help me.
>
> when i compile the following code :
>
> // this is in init() function
> .
> .
> Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
> Connection con=DriverManager.getConnection("jdbc:odbc:data1");
> Statement stmt=con.createStatement();
> ..
> ..
> protected void doPost(HttpServletRequest req,
> HttpServletResponse res)
> throws ServletException, IOException
> {
> ResultSet result;
> if(req.getParameter("action").equals("publisher"))
> {
> result=stmt.executeQuery("Select * from BookDetails");
> msg=result.getString(4);
> }
> ...
> ...
> ...
>
> This gives error as:
> --
> data1.java:59: Undefined variable or class name: stmt
> result=stmt.executeQuery("Select * from BookDetails");
> ^
> --
> Where do i define result ?
>
You went wrong in the init() method. In your case con and stmt are local
to the init() method. You should declare them as Fields of the class
(e.i. declare them right after you declare the class
public myclass{
Connection con;
Statement stmt;
public void init(){
con = ...;
stmt = ...;
}
}
This way it should work
--
---
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Brasil Informática e Telecomunicações Ltda.
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Re: How to send an HTML email message
Nabil Abbas wrote: > > Hello all, > > I am using Javamail to send an email message from a servlet. > I want to send an HTML message, but when I set the content type to > html/text I get sending failed error message, any help ? > > regards, > Nabil There is an excelent example in the example directory that comes with javamail on how to send HTML emails using java mail. sven -- --- Sven E. van 't VeerAfiliado Universo Online Gerente Desenvolvimento Brasil Informática e Telecomunicações Ltda. http://www.brvip.com.br http://www.uol.com.br --- ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
Re: Constructors in Servlet
"P.Yesudason" wrote:
>
> What is happening man.
>
> I am sure there is no concept of constructors in Servlet ..It is given in books.
>
> If yes Try to give the details ...seems to be intresting
>
> Yesudas
>
> sushilkumar wrote:
Since HttpServlet is a descendant of GenericServlet, which of course is
a descendant of java.lang.Object and since we know all descendants of
Object have a generic constructor, HttpServlet has a constructor too.
Some Code: (GenericServlet.java)
public abstract class GenericServlet
implements Servlet, ServletConfig, java.io.Serializable {
private transient ServletConfig config;
/**
* The default constructor does no work.
*/
public GenericServlet () { }
The same code can be found in HttpServlet.java
sven
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---
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Re: stop
David, > actually we need to > load another page immediately after the servlet starts, so the white page > comes after the other page, Couldn't you write a Thread that does the work for you ? You spawn the thread, and send the page you want to send. IMHO, you shouldn't let your servlet do a lot of db work. You spawn the thread and send the page you want. You won't even get the blank page. sven -- --- Sven E. van 't VeerAfiliado Universo Online Gerente Desenvolvimento Brasil Informática e Telecomunicações Ltda. http://www.brvip.com.br http://www.uol.com.br --- ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
Re: Are servlets being used in large sites ???
"Kwan, Kenneth Y" wrote: > > Try http://my.cwhktmobile.com <http://my.cwhktmobile.com> . The site was > originally written in Perl/CGI and migrated to completely Java Servlets for > performance and additional functionality offered by Java. To me, I would > choose only between servlets and VB/ASP. > I don't know the location of the site, but there's this huge casino site done in servlets too. -- --- Sven E. van 't VeerAfiliado Universo Online Gerente Desenvolvimento Brasil Informática e Telecomunicações Ltda. http://www.brvip.com.br http://www.uol.com.br --- ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
No Subject
Ajai Peddapanga wrote: > > SIGNOFF SERVLET-INTEREST > -Original Message- > From: A mailing list for discussion about Sun Microsystem's Java Servlet > API Technology. [mailto:[EMAIL PROTECTED]]On Behalf Of amod > deshpande > Sent: Thursday, April 06, 2000 6:47 AM > To: [EMAIL PROTECTED] > Subject: > > hi... > > how to invalidate the session when the browser is closed? > > thanks in advance > If the browser is closed, there is no session to invalidate -- Sven E. van 't Veer, llm. Departamento de Desenvolvimento Brasil Informatica. http://www.brvip.com.br ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
Re: NScape v.6 with java 1.2 support
Eike Hirsch wrote: > > hi, > i am tying to download it for about 6 houres, but can't get connection. Could > you send me the files? > eike > Try ftp8.netscape.com dir = /pub/netscape6/english/6_PR1 much smoother than web download.. sven -- Sven E. van 't Veer, llm. Departamento de Desenvolvimento Brasil Informatica. http://www.brvip.com.br ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
Re: Sending EMails AUTOMATICALLY thro' Servlets and JavaMail
> I > think it will be too costly to have a thread running in the > background, calculating the time. What should be the optimised > approach? Depends a bit on the OS you're using. In Linux, i would use cron to schedule the mail program to run at a specific time. In NT there must be something like a task scheduler too. All other unixes have job schedulers similar to cron. sven -- Sven E. van 't Veer, llm. Departamento de Desenvolvimento Brasil Informatica. http://www.brvip.com.br ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
Re: Servlet Authentication
pat wrote: > > Hi all ! > > There has been a lot of discussion on servlet authentication > in the last few days > I was successful in getting the dialog box to pop up and collect the > username and pwdi verify the pwd and give access to the system > Now i want to log the user out forcibly ...how do i do this?... > On pressing the refresh button (ie when the same Authentication servlet is > invoked again ), the browser doent pop up the box ! > Why does the webserver "remember" that i had logged in the system ?...and > how can i make it "forget" ?? if you're using sessiontracking, invalidate the session. sven -- Sven E. van 't Veer, llm. Departamento de Desenvolvimento Brasil Informatica. http://www.brvip.com.br ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
Re: Invoking Program from servlets
Alec Matias wrote: > > Hi! > > How can I run an external exe program from servlets with parameters? > Example I had an existing program.exe that needs to be executed with the > command like this. > > program.exe test 123 -f -o > > This is just a sample.Thanks. check out the java.lang.Runtime.exec() methods.. -- Sven E. van 't Veer, llm. Departamento de Desenvolvimento Brasil Informatica. http://www.brvip.com.br ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
Re: url size
Carlos Proal wrote: > > hi all, anyone know if there is a limit size about the url string ?? > > i mean, i want to send something like: > > http://www.lolo.com:8080/servlets/myservletparam=12345663...etc > afik, it's 256 bytes for a get and unlimited for post. sven -- Sven E. van 't Veer, llm. Departamento de Desenvolvimento Brasil Informatica. http://www.brvip.com.br ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
Re: servlets & linux
Rob Hazlewood wrote: > > hi! > I need to develop some kinda large servlets and am looking at doing it in > linux. Is there a servlet developers kit for linux? > also, I also need a linux web server with servlet support - does apache > support servlets? if it doesn't, how should I overcome the problem? (plugins > or different server?) > > thanks in advance > Rob You'll need to install the Solaris version of the JSWDK. Apache in itself does not support servlets. You'll need to install mod_jserv which you can find on the apache site. Another possibility which I'm currently using for testing is JavaWebServer (Solaris version runs on linux). -- Sven E. van 't Veer, llm. Departamento de Desenvolvimento Brasil Informatica. http://www.brvip.com.br ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
Re: thread permission
James Skehan wrote: > Does the thread not have the same > permission as the servlet itself or is it a web server configuration > problem? Does the user under which the ServletExec runs have read/write rights in the dir where you are creating the text file ? Sven -- Sven E. van 't Veer, llm. Departamento de Desenvolvimento Brasil Informatica. http://www.brvip.com.br ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
Re: How to run servlets
Satish Satish wrote:
>
> Hi all:
> I have downloaded the Tomcat software, it is running okay.
> (1) Is there anything else to be configured.
>
> (2) how to run the servlets ?
>
> (3)I have written a simple hello world servlet, but when I compile it gives
> errors as mentioned below:
>
> HelloWorld.java:2: Package javax.servlet not found in import.
> import javax.servlet.*;
>^
> HelloWorld.java:3: Package javax.servlet.http not found in import.
> import javax.servlet.http.*;
>^
> HelloWorld.java:5: Superclass HttpServlet of class HelloWorld not found.
> public class HelloWorld extends HttpServlet {
> ^
> 3 errors
Statish,
It seems that either you did not install JSDK or you have not set your
classpath correctly. It should include /path/to/jsdk/jsdk.jar
sven
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Re: Web Servers
Madeleine Pengelley wrote: > > I > really like Java Web Server (not so happy about NT :-( ) for development and > testing. Is there any reason not to use it in production? It seems too > good to be true ;-) The one I can think of at the top of my head is the fact that it runs on NT. Afik, there is a solaris version though. Sven -- Sven E. van 't Veer, llm. Departamento de Desenvolvimento Brasil Informatica. http://www.brvip.com.br ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
No Subject
Mahesh Chenga Reddy wrote: > > Idea is if we want to move to UNIX later, wanted to make use of these > SERVLETS. Does it make sense?. > Sure does, but why not move to unix right now. However, afik, there is an apache version that runs on NT (www.apache.org). You will need a build that allows for the use of mod_jserv or tomcat to run the servlets in apache. sven -- Sven E. van 't Veer, llm. Departamento de Desenvolvimento Brasil Informatica. http://www.brvip.com.br ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
Re: best servlet development environment to a guy with "not sodeep pockets"
Bradley McLain wrote: > > the best ide i have found is called 'textpad' ;-) it'll run you about 30 > bucks. > > www.textpad.com Hmm the one I'm using is free right now.. It's the best I've seen, better than VisualAge For Java and J++ builder. Right now it's available for free at www.netbeans.com.br. Just sign up for the Early Access Program and download it. Sven ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
Re: Can we call a pre-written HTML file directly instead of writingthe HTML tags in a servlet ????
"C.S.Sriram" wrote:
>
> Hi,
>
> Instead of writing the HTML in the servlet code
> like
> out.println("blah blah b
>
> can we call a Html file that contains these HTML tags directly into Servlert
> code???
>
> Is that possible?? If so how??
>
sure is possible. I do it like this:
private void sendHTMLForm(HttpServletResponse res){
PrintWriter out = null;
try{
out = res.getWriter();
} catch (IOException ex){
ex.printStackTrace(System.out);
}
try{
BufferedReader in = new BufferedReader(new
InputStreamReader(new
FileInputStream("/usr/local/jserv/reciadmin/incluir_pago_form.txt")));
String line = "";
while((line = in.readLine()) != null){
out.println(line);
}
} catch (IOException ex){
ex.printStackTrace(out);
}
} // from sendTitForm();
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Re: help
Mahesh Acharya wrote:
>
> Hi,
>
> How can we set init parameter in the web server configuration ?
>
> Basically, I want to get the values something like this, in the init
> method of the servlet
>
> String filename ;
> public void init(ServletConfig config) throws ServletException
> {
> super.init(config);
> filename = config.getInitParameter("addressfile");
> ...
depends on the servlet engine you use. In the case of mod_jserv (apache)
you would set these in the zone.properties file. In the case of tomcat
there is some xml file to set those options
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Re: help about servlets on linux
Faiyaz Memon wrote: > > hi all, > anybody knows where i can get jsdk2.0 for linux > i tried jsdk2.0 for solaris but it doesn't work > > also, I tried jsdk2.0 provided with a CD but the problem is > if i'm installing jsdk2.0 then the java stops working It shows the > class not found exception in main. if i'm uninstalling the jsdk2.0 > then it works alright. You must have done something wrong with the installation. Did you set the classpath variables correctly? You must set it to /path/to/JSDK2.0/lib/jsdk.jar for it to work. The correct version is the one for Solaris. Good luck -- Sven E. van 't Veer, llm. Departamento de Desenvolvimento Brasil Informatica. http://www.brvip.com.br ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
Re: Java Question
Parag Thakker wrote: > > Hi > > In Java how do we declare String on multiple line > > say String str = > " Select User > - Select (or change) the users below."; > > What character needs to be put in end > Basically i want to send HTML text on a page > is it possible to do without reformatting and > concating? String str = "This is var1: " + foo + " and this is var2: " + bar + "!"; if foo == 15 and bar == 13.38, your string will be: This is var1: 15 and this is var2: 13.38 -- Sven E. van 't Veer, llm. Departamento de Desenvolvimento Brasil Informatica. http://www.brvip.com.br ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
Re: Qué herramientas para servlets
> > Hi! > Best is IBM Visual Age for Java (requires lots of memory--64 MB for decent > performance) > then JBuilder 3 > Jdeveloper is an older version of JBuilder which Oracle bought > Hope it helps > Amit Raj I used both, but recently I started using Forte4j (Sun) It's still under development and also requires much memory (64 mb min). In layout it's comparable to most Borland IDE's, which is btw exaclty the way I like it. Visual Age imho has a strange way of doing things. Forte4j still has some bugs, but it's really nice to work with. Check it out at www.netbeans.com, look for the EAP and download it. It's fully modular, so you can update modules once they come available. It's got COBRA and EJB support. -- Sven E. van 't Veer, llm. Departamento de Desenvolvimento Brasil Informatica. http://www.brvip.com.br ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
Re: store *.gif and *.jpg from file in a database
> >
> > How can I store an *.gif or *.jpg file in a Database
> > and after display in a browser with servlet.
> > Specialy, I d'ont now how to read the picture-file
> > with a servlet and store this information in the
> > attribut of database. After, I want read the image
> > with a sevlet in the database and show in the browser.
> > Have somebody examples of servletcode??
> >
> > Very thanks for help
> >
A good idea is definately to get the oreilly util package
(www.servlets.com). It handels the multipart request from a HTTP post
operation. Here's an example:
try{
MultipartRequest m = new MultipartRequest(req, "/tmp");
Enumeration files = m.getFileNames();
String nome = m.getParameter("nome");
PrintWriter out = null;
try {
out = res.getWriter();
} catch (IOException ex){
ex.printStackTrace(System.out);
}
int InsertResult;
try{
Properties info = new Properties();
info.put("user", "user");
info.put("password", "password");
DbConnection db = new DbConnection(dbUrl, info);
Connection con = (Connection)db.getConnection();
Statement s = (Statement)con.createStatement();
InsertResult = (int)s.executeUpdate(Query);
if (InsertResult > 0){
Query = "select LAST_INSERT_ID() from marcas";
ResultSet r = (ResultSet)s.executeQuery(Query);
if (r.next()){
int id = r.getInt(1);
Query = "insert into marca_img values('" + id + "', ?, ?,
'', '')";
PreparedStatement ps =
(PreparedStatement)con.prepareStatement(Query);
try{
if (files.hasMoreElements()){
String name = (String)files.nextElement();
String filename = m.getFilesystemName(name);
String type = m.getContentType(name);
File f = m.getFile(name);
FileInputStream img = new FileInputStream(f);
ps.setString(2, type);
ps.setBinaryStream(1, img, (int)f.length());
int result = ps.executeUpdate();
img.close();
f.delete();
if (result < 1){
Then to show the image on a page, create a tag on the page
and the GetImage servlet should look something like this:
try{
dbconnection = new DbConnection(dbUrl, info);
connection = (Connection)dbconnection.getConnection();
Statement smt = (Statement)connection.createStatement();
String Query = "select image, content from marca_img where ndx="
+ id;
ResultSet rs = (ResultSet)smt.executeQuery(Query);
while (rs.next()){
response.setContentType(rs.getString(2));
try{
int BytesRead;
byte[] buf = new byte[64000];
InputStream dbin = rs.getBinaryStream(1);
while (((BytesRead=dbin.read(buf)) != -1)){
out.write(buf,0,BytesRead);
out.write(BytesRead);
}
out.flush();
rs.close();
smt.close();
} catch (IOException e) {
e.printStackTrace(System.out);
}
}
P.S. the ByteArray os declared as byte[64000] since I use mysql, and the
mysql jdbc driver has a bug, and cannot handle files of over 64k
--
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Departamento de Desenvolvimento
Brasil Informatica.
http://www.brvip.com.br
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JServ zone woes
I've tried desperately to deploy a set of servlets from my development machine to my apache server. It's the first time I deploy servlets on the net. My Host (apache on linux with mod_jserv) has a certain IP address (x.x.x.145) and the VirtualHosts in Apache are defined as x.x.x.129 ( on th same machine) I get it working when I have ApJServMount /admin /admin This means any.virtualhost.com.br/admin/login (on my machine) will show the LoginServlet. I don't want this.. so I tried ApJServMount /admin ajpv12://the.domain.com.br:8007/admin But this does not work.. mod_jserv.log: (EMERGENCY) ajp12: can not connect to host x.x.x.129 So I set security allowed addresses and included x.x.x.129 same error.. Any Ideas.. sven -- Sven E. van 't Veer, llm. Departamento de Desenvolvimento Brasil Informatica. http://www.brvip.com.br ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
Re: Limit to the number of records pulled to the browser
"Nayak, Lingaraj (CAP)" wrote: > > MB to store 1000 records with all the html tags. And for each MB of data the I do not know what db you use, but MySql for example implements a LIMIT clause in SQL which limit's the number of records fetched from the database, ex: SELECT * FROM FOO WHERE BAR=1 LIMIT 30 this would fetch 30 records from table FOO -- Sven E. van 't Veer, llm. Departamento de Desenvolvimento Brasil Informatica. http://www.brvip.com.br ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
Re: SERVLET - inserting databse values from an HTML form.
"Lambert, Stephen : CO IR" wrote:
>
Lambert,
If you try to POST from a form in HTML you should
implement the doPost method of HttpServlet and not doGet...
> My servlet "JdbcServlet3" is listed below and will compile without errors.
> However, when I try to POST the HTML FORM, I recieve the following error:
> Bad Request
> Your browser sent a request that this server could not understand.
> public class JdbcServlet3 extends HttpServlet
> implements SingleThreadModel {
>
> private Connection conn;
> private void dbConnect() throws SQLException {
>
>DriverManager.registerDriver (new oracle.jdbc.driver.OracleDriver());
>conn = DriverManager.getConnection
> ("jdbc:oracle:thin:@w121c20.legacyhs:1521:FIRST",
>"slambert", "password");
> }
>
> /**
>* doGet method is called in response to a GET request
>*/
> public void doGet(HttpServletRequest request,
> HttpServletResponse response) throws ServletException,
> IOException
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Departamento de Desenvolvimento
Brasil Informatica.
http://www.brvip.com.br
___
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Re: Servlet and gif images
Massimo Casella wrote:
>
> I have an image stored in a field of my database. I must show this image in
> a html page on Apache server.
> Can I show the images without write before the file in the server
> filesistem?
>
Your HTML page should include an image tag like this:
your getImage servlet than gets the image from the db and shows it on
the page.
the code in the getImage servlet should looke somethin like this:
try{
dbconnection = new
DbConnection("jdbc:mysql://foo-bar.com:3306/shopping", info);
connection = dbconnection.getConnection();
Statement smt = connection.createStatement();
String Query = "select * from bar_table where num=" + someInfo;
ResultSet rs = smt.executeQuery(Query);
while (rs.next()){
try{
int BytesRead;
byte[] buf = new byte[4];
InputStream dbin = rs.getBinaryStream(6);
while (((BytesRead=dbin.read(buf)) != -1)){
out.write(buf,0,BytesRead);
out.write(BytesRead);
}
out.flush();
rs.close();
smt.close();
} catch (IOException e) {
out.println("oops!");
ex.printStackTrace(out);
}
}
--
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Departamento de Desenvolvimento
Brasil Informatica.
http://www.brvip.com.br
___
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Re: How to create directories on server
"Meng, Dong J (CAP, CDI)" wrote: > > Hi: > > We have Netscape web server and Jrun on New York. This web server can access > our Unix server on Atlanta. I try to use browser to fill directory > information, then go through Web Server, create directories on our Unix > server. For example, our Unix server IP is 3.79.30.234, I want create one > directory called JavaCode under /custapps/dev. Do you know how to do it? Do > you have sample code? > > Thanks in advance. I have not come to this level of Java development yet, But I could imagine a solution where your webserver talks through a socket with your unix sever in Atlanta. the socket in Atlanta then uses Runtime.exec() to do a mkdir on the server. You might also want to look into java.rmi. sven -- Sven E. van 't Veer, llm. Departamento de Desenvolvimento Brasil Informatica. http://www.brvip.com.br ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
Re: VIRUS on "How to remove a line from a JTextArea"
Ron Reynolds wrote: > > also i would say this is a > VERY GOOD reason to add some form of filtering at the mail-server to remove > attachments and script blocks from these damn HTML emails. > just my humble opinion, of course... I agree, but AFIK it's a setting missing in MS Outlook Express. In netscape on my LinuxBox I have the option to not alow the execution of scripts in mail messages. Anyway, it would be a good idea to reject any HTML messages sent to the list. And that's my humble opinion.. sven -- Sven E. van 't Veer, llm. Departamento de Desenvolvimento Brasil Informatica. http://www.brvip.com.br ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
Re: Silly Question
Moloy Biswas wrote: > > do I have to do anything in Java Web Server for JDBC connection to load > the Oracle driver > No. You load the driver is your java application. -- Sven E. van 't Veer, llm. Departamento de Desenvolvimento Brasil Informatica. http://www.brvip.com.br ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
Re: On Linux! Typical Problem
>
> codelet will be most wellcome with some sample
> book information.
>
Properties info = new Properties();
info.put("user", "someuser");
info.put("password", "somepassword");
try{
DbConnection db = new
DbConnection("jdbc:mysql://myhost.com:3306/somedb", info);
Connection c = db.getConnection();
Statement s = c.createStatement();
--
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Departamento de Desenvolvimento
Brasil Informatica.
http://www.brvip.com.br
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Re: How to create the DSN name under linux.
P wrote: > > "sun/jdbc/odbc/JdbcOdbcDriver" not found. > take a look at your CLASSPATH variable. (in .bash_profile) make sure it contains a line: CLASSPATH=$CLASSPATH:.:/path/to/sun/jdbc/odbc/JdbcOdbcDriver/: (some othe java classes) and that the line EXPORT . contains CLASSPATH that sould do it. sven -- Sven E. van 't Veer, llm. Departamento de Desenvolvimento Brasil Informatica. http://www.brvip.com.br ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
Redirection and framsets
I'm doing a database application in servlets. After the user has logged in, I send a page with two frames to the client. The left side contains the menu and the right side is where the user can enter/alter data depending on the menu option chosen. In some cases the right side may contain two frames (top and bottom) where the user can enter search criteria in the top frame and the data is displayed on the bottom. I keep track of the users session through the session object. If the server invalidates the session after let's say 30 minutes of inactivity I do a sendRedirect to the loginservlet whenever the user clicks at any of the buttons. The loginservlet however displays the login page in the target frame but I want the page to be shown using the whole browser window. The code I'm using String url = baseUrl + "adminLoginServlet"; res.setStatus(HttpServletResponse.SC_RESET_CONTENT); res.sendRedirect(url); Does anyone have any Idea on how to resolve this. Sven -- Sven E. van 't Veer, llm. Departamento de Desenvolvimento Brasil Informatica. http://www.brvip.com.br ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
Re: getParameters
Darko wrote:
>
> Hello,
>
> How do I retrieve all the parameter names and/or values at once from an
> html page ?
> I have around 100 paramaters on my html page and when I call a servlet
> to process them, I use following code to retrieve parameter names
>
> Enumeration enum = req.getParameterNames();
>while (enum.hasMoreElements()) {
> String name = (String) enum.nextElement();
> out.println("name = "+i+" "+name);
> i++;
> out.println();
>
> But I get only about 30 parameter names, I dont know what happened with
> the rest.
You're probably using GET to pass the info. Try using post.
--
Sven E. van 't Veer, llm.
Departamento de Desenvolvimento
Brasil Informatica.
http://www.brvip.com.br
___
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Re: Calling a Windows Line Command from a Servlet
Jay Macarty wrote: > > I have a servlet which needs to interact with another application. The > problem is that the application normally works from commands entered at a > DOS prompt window. I need to be able to invoke the command and trap the > output. I think I have seen this done before but can't remember where. > try the exec(String Args[]) from the java.lang.Runtime class -- Sven E. van 't Veer, llm. Departamento de Desenvolvimento Brasil Informatica. http://www.brvip.com.br ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
Re: help: connection pool
Luc Saint-Elie wrote: > > Hello, > > I use Hans Bergsten connection pool for tests every day and it work fine > right out of the box (its so cool that it could be part of every java > server side installation :-) Please tell me where I can find it -- Sven E. van 't Veer, llm. Departamento de Desenvolvimento Brasil Informatica. http://www.brvip.com.br ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
Re: PLEASE stop sending HTML mail
> and you should know > more about purpose, bandwidth and -why not?- netiquette, to require effort > on the other end of a communication channel, instead of sticking to the > baseline. > I do not understand something here I gues.. But ehhrr.. why would anyone send a question on servlets in HTML format knowing that those who might have the answer can't read the question in the first place. -- Sven E. van 't Veer, llm. Departamento de Desenvolvimento Brasil Informatica. http://www.brvip.com.br ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
Re: (sorry for dual post) PLEASE stop sending HTML mail
Arnaud D wrote: > > Isn't this a list to talk about servlets ? > > PS : I agree with Simon. Last time i checked my emails on a text terminal > was in college on a bull DPX2 (unix) in 1996, before the school decided to > run linux over bull proprietary unix. > Well I do use an HTML enabled email reader on a linux box and I don't like HTML mail much, Some people use font's so small it's hardly readable. While HTML works for some, plaintext-ASCII works for everyone. -- Sven E. van 't Veer, llm. Departamento de Desenvolvimento Brasil Informatica. http://www.brvip.com.br ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
Re: RH Linux 6.1 + Apache + JServ + IBM JDK 118 Prolems
Sean Merritt wrote: > Everytime I access a servlet the error logs indicate that the JVM starts and the > dies > in rapid succession. > > Any insight from those who have this or a VERY similar configuration going > greatly appriciated. > Please no pointers to the Apache FAQ , been there with little results. In fact > last attempt to access it > failed to load the Jserv FAQ at all... FAQ-omatic indeed. Using the same setup, (Only difference is I use a home brewed apache) I had exactly the same problem with IBM's jdk 1.1.8. I decided to switch to sun's jdk 1.2 and the problem stoped. sven -- Sven E. van 't Veer, llm. Departamento de Desenvolvimento Brasil Informatica. http://www.brvip.com.br ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
Re: It just does not want to work.
Tarek Shaar wrote: > > > even though the name of my class is ClientSide1.java and the name of the amin class >in the code is the same. > > When I run it using IE > "Can't find class ClientSide1.class!Why Why !!! > > The class file ClientSide1 and the html page clientSidePage.html are placed in the > same directory "on my Java Webserver 2.0" in public_html. I'm just guessing here, but try http://foo.bar.com/path/to/applets/ClientSide1.class" NAME = "ClientSide1" WIDTH= 400 HEIGHT = 300 HSPACE = 0 VSPACE = 0 ALIGN= middle > -- Sven E. van 't Veer, llm. Departamento de Desenvolvimento Brasil Informatica. http://www.brvip.com.br ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
Images from database.
I had this working in PHP and would like to do the same thing with servlets. On one page can include some data, including an image to a database (mysql) and on an otherpage he can retrieve the data from the database, including the image. I've been working on the second part, retrieving the image, and cannot get it to work. I'm rather new to java programming and would like some hint's, code snippets of this kind of operation. What I figured is that I have to get the image from the as a byte[], but i cannot get it written to the output stream Thanks in advance -- Sven E. van 't Veer ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
Session Tracking
Hello everyone. A real newby question, I suppose. But I've searched the faqs etc. and haven't found it. I'd like to track sessions but avoid cookies. I've found the info, that getSession() determines wheater the browser can place cookies or not. But I don't want the user be asked for cookies ... Everything I've found starts with HttpSession session = req.getSession(true); When I write a doGet() method with nothing in except for this line and start it from Netscape 4.0, Netscape asks me if I want to accept a cookie. So from where can I get a session or sessionID for rewriting URLs to avoid cookies? Thanks in advance, Sven Fuchs ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
MailFormHandler - no mail from sendmail
Hello everyone! [new to this list, please tell me if my question has been answered and is to be found in the archives - haven't found anything about it there] I've written a shoppingcart-servlet including an mailform-handler to send the order-form per email. Everything is very fine, working with servlets. But there's one problem I'm not able to solve: When I send the mail from the class' main() (to test it) from my hd, the mail arrives my mailbox. When I send it from the servlet's doPost() from the external server, the mail never arrives me. Everything else is the same code, same mailadress, same mailserver etc. There's no exception thrown getting the outputstream from socket, nothing. My servlet tells me, that the mail has been send, but it doesn't arrive me - but only if I try to send it from the upload servlet via doPost(). I've been wondering and wondering ... Has someone a hint? Thanks in advance. Greets, Sven Fuchs [EMAIL PROTECTED] ___ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
