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Author

JSP Logout

Ashok Haluvarthi
Greenhorn

Joined: Jul 04, 2002
Posts: 13
Hello every one,
i have one index.html in which username and password will be send to login page like this....
my prob is when i press logout button the session has to invalidate but when i press back button from IE Browser it will again enter in to the data page what may be the prob....
Code...
index.html
<html>
<form name="form1" method="post" action="login.jsp">
<input type="text" name="username">

<input type="password" name="password">
<input type="submit" name="Submit" value="Login" >
</font></p>
</form>
</html>
login.jsp
<html>
<body background="back_right.gif">
<head>
<%
response.setHeader("cache-control","no-cache");
response.setHeader("pragma","no-cache");
response.setDateHeader("Expries",0);

%>
</head>
<%
String u_name=request.getParameter("username");
String p_name=request.getParameter("password");
String pass="";

%>
<input type="hidden" name="username" value="<%= u_name %>">
<jsp:usebean id="dbbean" scope="page" class="com.redfern.DBQuery" />
<%
pass=dbbean.getPassword(u_name);
if(p_name.equals(pass))
{
session.setAttribute("user",u_name);
%>
<jsp:include page="data.jsp" />

<% }
%>

</body>
</html>
BEAN DBQuery.java file
package com.redfern;
import java.util.*;
import java.sql.*;

public class DBQuery
{
String password="";

public String getPassword(String u_name)
{
String url="jdbc dbc:lesolei";
String user="scott";
String pass="tiger";

try{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection con=DriverManager.getConnection(url,user,pass);
Statement stm= con.createStatement();
ResultSet rs= stm.executeQuery("select password from ashok where username='"+u_name+"' ");
while(rs.next())
{
String return1=rs.getString(1);
password=return1;
}
rs.close();
if(password=="")
{
password="No Password Found for"+password;
}
}//try
catch(Exception e){password="There was an Error"+e;
}//end catch
return password;
}
}
and data.jsp
<html>
<head>
<title>Termination Report</title>
<META HTTP-EQUIV="Pragma" CONTENT="no-cache">
<META HTTP-EQUIV="Expires" CONTENT="-1">
<%
if(session.getAttribute("user")== null){ %>
<jsp:forward page="index2.htm" />
<% } %>
<%
response.setHeader("cache-control","no-cache");
response.setHeader("Pragma","no-cache");
response.setDateHeader("Expires",0);
%>
</head>
<body>
<%= "Hello" %>
<%
out.println(session.getAttribute("user"));
%>
<form action=logout.jsp>
<input type=submit name=send value=logout>
</form>
</body>
</html>
logout.jsp

<%
session.setAttribute("user",null);
session.invalidate();
response.sendRedirect("index.html");
%>
Pls help me out it is very urgent
 
 
subject: JSP Logout