Servlet Config
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
<display-name>WebConfig</display-name>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>
<servlet>
<description></description>
<display-name>conServlet</display-name>
<servlet-name>conServlet</servlet-name>
<servlet-class>tis.demo.conServlet</servlet-class>
<init-param>
<param-name>d1</param-name>
<param-value>com.mysql.jdbc.Driver</param-value>
</init-param>
<init-param>
<param-name>d2</param-name>
<param-value>jdbc:mysql://localhost:3306/emp</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>conServlet</servlet-name>
<url-pattern>/conServlet</url-pattern>
</servlet-mapping>
</web-app>
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Login Page</title>
</head>
<body>
<h1>Login</h1>
<form action="conServlet">
Username:<input type="text" name="t1"><br>
Password:<input type="password" name="t2"><br>
<input type="submit" value="login" >
</form>
</body>
</html>
package tis.demo;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
import java.util.Enumeration;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class conServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
public conServlet() {
super();
}
protected void doGet(HttpServletRequest req, HttpServletResponse response) throws ServletException, IOException {
PrintWriter out=response.getWriter();
String s1=req.getParameter("t1");
String s2=req.getParameter("t2");
String dd1=getServletConfig().getInitParameter("d1");
String dd2=getServletConfig().getInitParameter("d2");
ServletConfig config=getServletConfig();
Enumeration ee=config.getInitParameterNames();
while(ee.hasMoreElements())
{
String s=(String)ee.nextElement();
out.println(config.getInitParameter(s));
}
try{
Class.forName(dd1);
Connection connection=DriverManager.getConnection(dd2,"root","admin");
Statement st=connection.createStatement();
ResultSet rs=st.executeQuery("select * from login where Uname='"+s1+"'and Upass='"+s2+"'");
if (rs.next())
out.print("Welcome! "+s1);
else
out.print("invalid user");
}
catch(Exception e){
out.print(e);
}
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
}
}
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