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PONull point always
 

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    <p>It all ways passing null point after this line, <code>System.out.println("Inside the filter.............." )</code>; so can anyone tell me what's wrong in my code and logic</p> <p>and home.jsp(index page) did not display. here I want to filter every url and proceed only valid login users requests. here my logic..</p> <p>UserServlet.java</p> <pre><code> private void loginDetail(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException{ User u = new User(); UserService us =new UserServiceImpl() ; String Uname = request.getParameter("txtUname"); String Pwrd = request.getParameter("txtPwrd"); u.setUname(Uname); u.setPwrd(Pwrd); System.out.println(Uname+""+Pwrd); try { if(us.Userlogin(u.getUname(),u.getPwrd())){ String message = "Thank you, " + Uname +"..You are now logged into the system"; request.setAttribute("message", message); //RequestDispatcher rd = getServletContext().getRequestDispatcher("/menu.jsp"); //rd.forward(request, response); HttpSession session = request.getSession(true); session.setAttribute("loggedUser", u); String reqUrl = (String)session.getAttribute("requestedURL"); session.removeAttribute("requestedURL"); response.sendRedirect(reqUrl); }else{ // direct to login} </code></pre> <p>FilterRequest.java </p> <pre><code>public void init(FilterConfig filterConfig) throws ServletException { this.filterConfig = filterConfig; } public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain) throws ServletException, IOException { HttpServletRequest request = (HttpServletRequest) req; HttpServletResponse response = (HttpServletResponse) resp; System.out.println("Inside the filter.............." ); HttpSession session = request.getSession(true); User u = null; if(session.getAttribute("loggedUser")!=null){ u = (User) session.getAttribute("loggedUser"); } if (u!= null) { System.out.println("user does exits.." + u.getUname() ); chain.doFilter(req, resp); }else{ String message = "Please Login!"; req.setAttribute("loginMsg", message); //response.sendRedirect("login2.jsp"); } } </code></pre> <p>web.xml</p> <pre><code> &lt;filter&gt; &lt;filter-name&gt;FilterRequest&lt;/filter-name&gt; &lt;filter-class&gt;com.mobitel.bankdemo.web.FilterRequest&lt;/filter-class&gt; &lt;/filter&gt; &lt;filter-mapping&gt; &lt;filter-name&gt;FilterRequest&lt;/filter-name&gt; &lt;url-pattern&gt;/*&lt;/url-pattern&gt; &lt;/filter-mapping&gt; </code></pre> <p>stack trace</p> <pre><code> `Jul 11, 2013 10:24:26 AM org.apache.catalina.core.AprLifecycleListener init INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: C:\Program Files\Java\jre6\bin;.;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;C:/Program Files/Java/jre6/bin/client;C:/Program Files/Java/jre6/bin;C:/Program Files/Java/jre6/lib/i386;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files\Kaspersky Lab\Kaspersky Anti-Virus 6.0 for Windows Workstations MP4\;C:\Program Files\Java\jdk1.6.0_07/bin;C:\Program Files\MySQL\MySQL Server 5.2\bin;D:\common libs\com.mysql.jdbc_5.1.5.jar;;C:\Users\lcladmin\Documents\Softwares\java related\eclipse-jee-indigo-win32_2\eclipse; Jul 11, 2013 10:24:26 AM org.apache.tomcat.util.digester.SetPropertiesRule begin WARNING: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:BankDemoWeb' did not find a matching property. Jul 11, 2013 10:24:27 AM org.apache.coyote.AbstractProtocol init INFO: Initializing ProtocolHandler ["http-bio-8080"] Jul 11, 2013 10:24:27 AM org.apache.coyote.AbstractProtocol init INFO: Initializing ProtocolHandler ["ajp-bio-8009"] Jul 11, 2013 10:24:27 AM org.apache.catalina.startup.Catalina load INFO: Initialization processed in 554 ms Jul 11, 2013 10:24:27 AM org.apache.catalina.core.StandardService startInternal INFO: Starting service Catalina Jul 11, 2013 10:24:27 AM org.apache.catalina.core.StandardEngine startInternal INFO: Starting Servlet Engine: Apache Tomcat/7.0.41 Jul 11, 2013 10:24:27 AM org.apache.coyote.AbstractProtocol start INFO: Starting ProtocolHandler ["http-bio-8080"] Jul 11, 2013 10:24:27 AM org.apache.coyote.AbstractProtocol start INFO: Starting ProtocolHandler ["ajp-bio-8009"] Jul 11, 2013 10:24:27 AM org.apache.catalina.startup.Catalina start INFO: Server startup in 517 ms Inside the filter.............. user does exits..` </code></pre> <p>Thank you..</p>
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    1. USuser1758876
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    1. COwelcome to stackoverflow... it would be really helpful if you had a somewhat more informative and concise title than "what's wrong with my code" for your questions. [Here's one FAQ](http://stackoverflow.com/help/dont-ask).
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      1. USMichael Dautermann
    2. CONull check your `req` parameter. Include the stack trace.
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      1. USeebbesen
    3. CO@eebbesen have you done Java web development before? Surely that's not the problem.
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      1. USLuiggi Mendoza
 

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