Retrieving data from oracle database and displaying using servlets

Question

//DataRetrieving.class file
import java.io.*;
import java.sql.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class DataRetrieving extends HttpServlet{
public void doGet(HttpServletRequest request, HttpServletResponse response)throws
ServletException, IOException{ 
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out.println("A program for connecting oracle database");
try
Class.forName("oracle.jdbc.driver.OracleDriver");
Connection con = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:ORCL", "scott","tiger");
Statement stmt = con.createStatement();
ResultSet r = stmt.executeQuery ("SELECT ename,job,sal,comm,deptno FROM emp");
while ( r.next() )
     String bar = r.getString("ename");
     String bar1 = r.getString("job");
     float bar2 = r.getInt("sal");
     float bar3 = r.getInt("comm");
     int bar4 = r.getInt("deptno");
     //out.println(r.getString(0)+" "+r.getString("ename"));
     out.println("hi");
     out.println(bar1);
r.close();
stmt.close();
con.close();
catch (Exception e)
out.println("ERROR : " + e);
//web.xml file
<?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/dtd/web-app_2_3.dtd"> -->
<web-app>
<servlet>
<servlet-name>Hello</servlet-name>
<servlet-class>DataRetrieving</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Hello</servlet-name>
<url-pattern>/DataRetrieval</url-pattern>
</servlet-mapping>
</web-app>
while running the servlet , i am unable to retrieve the data
The error message i am getting is
A program for connecting oracle database
ERROR : java.lang.ClassNotFoundException: oracle.jdbc.driver.OracleDriver
after running the servlet.
what could be the problem?

Answer 1

import java.io.*;
import java.sql.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class myserv extends HttpServlet
public void doGet(HttpServletRequest req,HttpServletResponse res)throws ServletException,IOException
res.setContentType("text/html");
PrintWriter pw=res.getwriter();
pw.println("Connecting data base");
     try
     Class.forName("oracle.jdbc.driver.OracleDriver");
     Connection con=Drivermanager.getConnection("jdbc:oracle:thin:@localhost:1521:orcl","scott","tiger");
     Stamtenet st=con.createStament();
     Resultset rs=con.executeQurey("select * from emp");
     while(rs.next())
     rs.getInt("empno")+" "+rs.getDouble("sal"));
     }catch(Exception e)
}