Open JSP page by user name

Question

Hi Experts,
I have a login servlet LoginServlet.java and an user welcome screen welcome.jsp. When user login and after user validation i want to open welcome.jsp like
www.wesitename.com/username instead of www.wesitename.com/welcome.jsp. How can i do it please suggest me.
Edited by: live_to_java on Jun 18, 2010 5:29 AM

Answer 1

That's not strange cause You set welcome mapping to "/*" so it also catches your index.jsp. I've modified my code and used filter, here it goes:
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app id="WebApp_ID" version="2.4"
     xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
     <display-name>TestServlet</display-name>
     <filter>
          <filter-name>accessFilter</filter-name>
          <filter-class>org.opal.test.filters.AccessFilter</filter-class>
     </filter>
     <filter-mapping>
          <filter-name>accessFilter</filter-name>
          <url-pattern>/*</url-pattern>
     </filter-mapping>
     <servlet>
          <servlet-name>loginServlet</servlet-name>
          <servlet-class>org.opal.test.servlets.LoginServlet</servlet-class>
     </servlet>
     <servlet-mapping>
          <servlet-name>loginServlet</servlet-name>
          <url-pattern>/login</url-pattern>
     </servlet-mapping>
     <servlet>
          <servlet-name>index</servlet-name>
          <jsp-file>/index.jsp</jsp-file>
     </servlet>
     <servlet-mapping>
          <servlet-name>index</servlet-name>
          <url-pattern>/index/*</url-pattern>
     </servlet-mapping>
     <servlet>
          <servlet-name>welcome</servlet-name>
          <jsp-file>/welcome.jsp</jsp-file>
     </servlet>
     <servlet-mapping>
          <servlet-name>welcome</servlet-name>
          <url-pattern>/*</url-pattern>
     </servlet-mapping>
</web-app>AccessFilter.java
package org.opal.test.filters;
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
public class AccessFilter implements Filter {
     public void init(FilterConfig fc) throws ServletException {
     public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {
          HttpServletRequest request = (HttpServletRequest) req;
          HttpServletResponse response = (HttpServletResponse) res;
          HttpSession session = request.getSession();
          String user = (String) session.getAttribute("user");
          if (request.getRequestURI().contains("login")) {
               chain.doFilter(request, response);
               return;
          if (user == null) {
               RequestDispatcher rd = request.getRequestDispatcher("/index");
               rd.forward(request, response);
          } else {
               chain.doFilter(request, response);
               return;
     public void destroy() {
}LoginServlet.java
package org.opal.test.servlets;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
public class LoginServlet extends HttpServlet {
     private static final long serialVersionUID = -215349891382765184L;
     @Override
     protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
          processRequest(req, resp);
     @Override
     protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
          processRequest(req, resp);
     private void processRequest(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
          HttpSession session = req.getSession();
          session.setAttribute("user", req.getParameter("login"));
          resp.sendRedirect(req.getContextPath() + "/" + req.getParameter("login"));
}index.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!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>Insert title here</title>
</head>
<body>
     <form action="login" method="post">
          <input type="text" value="Opal" name="login">
          <input type="submit" value="ok">
     </form>
</body>
</html>welcome.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!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>Insert title here</title>
</head>
<body>
     Welcome
     ${sessionScope.user}
</body>
</html>