Hello everyone...
Sorry In my prevous file I attach wrong file in the body...
I am trying to connect the run a simple servlet to retrieve the
query results from DB2 database.
1. Before writing a servlet, I wrote a simple java file and was successful
in retrieving the
contents from DB2 UDB.
2. Then I just converted the same JAVA file into servlet by adding Servlet
API and syntax in it.
3. It compiles fine.
4. Then from a web page I try to pass one parameter to my servlet.
5. The servlet doesnot retrieve any records from the database which
initially it was bringing
when I wrote simple java file.
import java.sql.*;
import java.lang.*;
import java.io.*;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class Ndb2Websphere extends HttpServlet {
Statement stmt;
ResultSet rs;
int count =0;
public void doGet (HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException
{
res.setContentType("text/html");
ServletOutputStream out = res.getOutputStream();
String emp = req.getParameter("empnumber");
out.println("paramater passed is "+emp +" <BR>");
out.println("<BR><BR>Count is"+ count);
try{
Class.forName("COM.ibm.db2.jdbc.net.DB2Driver");
out.println("<BR>Found the JDBC driver <BR>");
}
catch( Exception e)
{
// e.printStackTrace();
out.println("\nDriver class not found
exception");
}
finally
{
out.println("<BR>Driver is properly loaded and
registered ");
}
try{
Connection con = null;
String url;
out.println("<BR>Connection URL is good");
try{
con = DriverManager.getConnection
("jdbc:db2://100.3.13.34/SAMPLE","db2admin","db2pwd");
}
catch( Exception e4)
{
e4.getMessage();
e4.printStackTrace();
}
// retrieve data from the database
out.println("<BR>Retrieve some data from the
database...");
try{
stmt = con.createStatement();
rs = stmt.executeQuery("SELECT empno from
db2admin.employee");
}
catch( Exception e5)
{
e5.getMessage();
e5.printStackTrace();
}
out.println("<BR>Received results:");
try{
if(!rs.next())
{
count = count +1;
String a = rs.getString(1);
out.println(" empno is " + a );
out.println("<BR><BR>While Count is"+ count);
}
}
catch( Exception e6)
{
e6.printStackTrace();
}
out.println("<BR><BR>Count is"+ count);
rs.close();
stmt.close();
con.close();
}
catch (SQLException e1)
{
e1.getMessage();
e1.printStackTrace();
}
catch( Exception e)
{
e.getMessage();
e.printStackTrace();
}
finally
{
out.println("<BR>I am out");
}
}
public void doPost (HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException
{
doGet(req,res);
}
}
------------------------------------------------------------------------------------
Nishant Awasthi
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