Can you post the full stack trace?
On Wed, Sep 23, 2009 at 8:20 AM, anu <[email protected]> wrote:
>
> Hi every body,
>
> iam develpoing a sample application for login form with
> validations and persist the data by using googleappengine with java
> using eclipse.but iam getting the null pointer exception at the time
> of running.plz any one tell me the solution.
> my code is
> registe.jsp
> <%@ page contentType="text/html;charset=UTF-8" language="java" %>
> <%@ page import="java.util.List" %>
>
> <%@ page import="java.util.ArrayList" %>
>
> <%@ page import="javax.jdo.PersistenceManager" %>
>
> <%@ page import="javax.jdo.Query" %>
>
> <%@ page import="com.google.org.*" %>
>
> <html>
> <SCRIPT LANGUAGE="JavaScript">
>
> function button_actions()
> {
> var flag=0;
> var errors="";
>
> if(!document.my_form.first_name.value)
> {
> alert("you need to supply your first name");
> document.my_form.first_name.focus();
> return false;
> }
> if(!document.my_form.last_name.value)
> {
> alert("you need to supply your last name");
> document.my_form.last_name.focus();
> return false;
> }
>
> var id = document.my_form.email.value;
> var re = /^...@.+\..{2,4}$/gi;
> if(!id.match(re))
> {
> flag++;
> errors = errors + "E-Mail\n";
>
> }
> if(flag > 0)
> {
> alert("invalid email adress\n"+
> errors+"\nPlease re-enter email-id.");
> return 0;
> }
>
>
> if(!document.my_form.user_password.value)
> {
> alert("you need to supply your passsword");
> document.my_form.user_password.focus();
> return false;
> }
>
>
> }
>
> </SCRIPT>
>
> <body>
>
> <div class="main">
> <div class="header">
> <h1>
> example
> </h1>
> </div>
>
> <h2>
> new entry
> </h2>
>
> <div class="ex">
> <form name="my_form" action="./register2" method="get">
> First Name
> <input type="text" name="first_name" size="30"></br>
>
> LastName
> <input type="text" name="last_name" size="30"></br>
>
> Email
> <input type="text" name="email" size="30"></br>
>
> password
> <input type="password" name="user_password" size="30"></br>
>
> confirm password
> <input type="password" name="confirm_password" size="30"></br>
>
> <input type="submit" value="submit" onclick="button_actions()"/>
>
> </form>
> </div>
> <h2>
> entries
> </h2>
>
> <div class="entryList">
> <%
> List<entry> entries= new ArrayList();
> PersistenceManager pm=PMF.get().getPersistenceManager();
> Query query=pm.newQuery("SELECT FROM " +entry.class.getName());
> entries=(List<entry>) query.execute();
>
> %>
> <%
> if(entries.isEmpty()) {
> %>
>
> <%
> }
> else {
> %>
>
> <%
> for(entry e:entries){
> %>
>
> <div> <%=e.getEmail()%></div>
> <div class="Quantity"> Quantity is<%=e.getUser_password()%></
> div>
>
> <%
> }
> }
> %>
> </div>
>
> </body>
> </html>
>
>
>
>
> web.xml:
>
> <servlet>
> <servlet-name>Shop2</servlet-name>
> <servlet-class>com.google.org.Shop2Servlet</servlet-class>
> </servlet>
> <servlet-mapping>
> <servlet-name>Shop2</servlet-name>
> <url-pattern>/shop2</url-pattern>
> </servlet-mapping>
> <welcome-file-list>
> <welcome-file>shop2.jsp</welcome-file>
> </welcome-file-list>
> </web-app>
>
>
>
> enty.java
>
> import javax.jdo.annotations.IdGeneratorStrategy;
> import javax.jdo.annotations.IdentityType;
> import javax.jdo.annotations.PersistenceCapable;
> import javax.jdo.annotations.Persistent;
> import javax.jdo.annotations.PrimaryKey;
> @PersistenceCapable(identityType = IdentityType.APPLICATION)
> public class entry {
> @PrimaryKey
> @Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
> private Long id;
> @Persistent
> private String first_name;
> @Persistent
> private String last_name;
> @Persistent
> private String email;
> @Persistent
> private String user_password;
> @Persistent
> private String confirm_password;
> public entry(String email,String user_password)
> {
> this.email= email;
> this.user_password= user_password;
>
> }
> public Long getId() {
> return id;
> }
> public void setId(Long id) {
> this.id = id;
> }
> /*public String getFirst_name() {
> return first_name;
> }
> public void setFirst_name(String firstName) {
> first_name = firstName;
> }
> public String getLast_name() {
> return last_name;
> }
> public void setLast_name(String lastName) {
> last_name = lastName;
> }*/
> public String getEmail() {
> return email;
> }
> public void setEmail(String email) {
> this.email = email;
> }
> public String getUser_password() {
> return user_password;
> }
> public void setUser_password(String userPassword) {
> user_password = userPassword;
> }
> /*public String getConfirm_password() {
> return confirm_password;
> }
> public void setConfirm_password(String confirmPassword) {
> confirm_password = confirmPassword;
> }*/
>
> }
>
>
> pmf.java
> package com.google.org;
>
>
>
> import javax.jdo.JDOHelper;
> import javax.jdo.PersistenceManagerFactory;
>
> public final class PMF {
> private static final PersistenceManagerFactory pmfInstance =
> JDOHelper.getPersistenceManagerFactory("transactions-
> optional");
>
> private PMF() {}
>
> public static PersistenceManagerFactory get() {
> return pmfInstance;
> }
> }
>
> register.java
>
> package com.google.org;
>
> import java.io.IOException;
> import javax.servlet.http.*;
> import javax.servlet.*;
> import java.util.*;
> import java.io.*;
> import javax.jdo.PersistenceManager;
> import javax.jdo.Query;
>
>
> @SuppressWarnings("serial")
> public class Register2Servlet extends HttpServlet {
> HttpSession session;
>
> String user_password,email, clickButton;
> public void doGet(HttpServletRequest req, HttpServletResponse resp)
> throws IOException {
>
> resp.setContentType("text/plain");
> PrintWriter pw=resp.getWriter();
> session=req.getSession(true);
> clickButton=req.getParameter("submit");
>
>
> email=req.getParameter("email");
> user_password=req.getParameter("user_password");
>
> entry ex=new entry(email,user_password );
> PersistenceManager pm=PMF.get().getPersistenceManager();
> pm.makePersistent(ex);
> if(clickButton.equals("submit"))
> {
>
> if(!(email.equals("")||user_password.equals("")))
>
> session.setAttribute(email,user_password);
>
> resp.sendRedirect("./register.jsp");
>
> }
> pw.close();
> pm.close();
>
>
> }
> }
>
>
> plzzzzzzzzzzzzzz help me.
>
>
> >
>
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