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Parveen
what is the code to how to log out from the website?
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March 17, 2008 at 9:23 PM
Java Example code of Login and Logout from the applications...
LoginPage.jsp
<html>
<head>
<title>login page in jsp</title>
</head>
<body>
<table border="1" width="30%" cellpadding="0" cellspacing="0">
<tr>
<td width="100%">
<form method="POST" action="loginAction.jsp">
<h2>Login Page In JSP</h2>
<table border="1" width="100%" cellpadding="0" cellspacing="0">
<tr>
<td width="50%"><b>Username:</b></td>
<td width="50%"><input type="text" name="username" size="25"></td>
</tr>
<tr>
<td width="50%"><b>Password:</b></td>
<td width="50%"><input type="password" name="password" size="25"></td>
</tr>
</table>
<p><input type="submit" value="Submit" name="B1">
<input type="reset" value="Reset" name="B2"></p>
</form>
</td>
</tr>
</table>
</body>
</html>
loginAction.jsp
<%@ page language="java" import="java.sql.*,java.util.*,java.text.*" %>
<%
Connection con = null;
String url = "jdbc:mysql://localhost:3306/";;
String db = "register";
String driver = "com.mysql.jdbc.Driver";
java.util.Date date;
String s=null;
try{
Class.forName(driver);
con = DriverManager.getConnection(url+db,"root","root");
try{
Statement st = con.createStatement();
String username=request.getParameter("username");
String password=request.getParameter("password");
int val = st.executeUpdate("insert userlogin values('"+username+"','"+password+"')");
session.setAttribute("username", request.getParameter("username"));%>
Welcome to <%= session.getAttribute( "username" ) %>
<% if (session.getAttribute("username").equals("") && session.getAttribute("password").equals("")){%>
<a href="loginPage.jsp"><b>Login </b></a>
<%}
else{%>
<a href="logoutAction.jsp"><b>Logout</b></a>
<%}%>
<%
con.close();
}
catch (SQLException ex){
System.out.println("SQL statement is not executed!");
}
}
catch (Exception e){
e.printStackTrace();
}
%>
- - - - -- -
logoutAction.jsp
<%@page import="java.util.*" %>
<%session.invalidate();%>
You have logout. Please try again
<a href="loginPage.jsp"><b>Login</b></a>
----------
Using the above given code you can write a application the will allow a user to log in and log out from the application using JSP
JSP Tutorials
http://www.roseindia.net/jsp
LoginPage.jsp
<html>
<head>
<title>login page in jsp</title>
</head>
<body>
<table border="1" width="30%" cellpadding="0" cellspacing="0">
<tr>
<td width="100%">
<form method="POST" action="loginAction.jsp">
<h2>Login Page In JSP</h2>
<table border="1" width="100%" cellpadding="0" cellspacing="0">
<tr>
<td width="50%"><b>Username:</b></td>
<td width="50%"><input type="text" name="username" size="25"></td>
</tr>
<tr>
<td width="50%"><b>Password:</b></td>
<td width="50%"><input type="password" name="password" size="25"></td>
</tr>
</table>
<p><input type="submit" value="Submit" name="B1">
<input type="reset" value="Reset" name="B2"></p>
</form>
</td>
</tr>
</table>
</body>
</html>
loginAction.jsp
<%@ page language="java" import="java.sql.*,java.util.*,java.text.*" %>
<%
Connection con = null;
String url = "jdbc:mysql://localhost:3306/";;
String db = "register";
String driver = "com.mysql.jdbc.Driver";
java.util.Date date;
String s=null;
try{
Class.forName(driver);
con = DriverManager.getConnection(url+db,"root","root");
try{
Statement st = con.createStatement();
String username=request.getParameter("username");
String password=request.getParameter("password");
int val = st.executeUpdate("insert userlogin values('"+username+"','"+password+"')");
session.setAttribute("username", request.getParameter("username"));%>
Welcome to <%= session.getAttribute( "username" ) %>
<% if (session.getAttribute("username").equals("") && session.getAttribute("password").equals("")){%>
<a href="loginPage.jsp"><b>Login </b></a>
<%}
else{%>
<a href="logoutAction.jsp"><b>Logout</b></a>
<%}%>
<%
con.close();
}
catch (SQLException ex){
System.out.println("SQL statement is not executed!");
}
}
catch (Exception e){
e.printStackTrace();
}
%>
- - - - -- -
logoutAction.jsp
<%@page import="java.util.*" %>
<%session.invalidate();%>
You have logout. Please try again
<a href="loginPage.jsp"><b>Login</b></a>
----------
Using the above given code you can write a application the will allow a user to log in and log out from the application using JSP
JSP Tutorials
http://www.roseindia.net/jsp
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