【求助】struts做的登陆出错
===============报错 =======================javax.servlet.ServletException: java.lang.NullPointerException
org.apache.struts.action.RequestProcessor.processException(RequestProcessor.java:535)
org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:433)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
root cause
java.lang.NullPointerException
com.movie.struts.action.LoginAction.execute(LoginAction.java:46)
org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
note The full stack trace of the root cause is available in the Apache Tomcat/6.0.13 logs.
=====================loginAction.jave页面==============
/*
* Generated by MyEclipse Struts
* Template path: templates/java/JavaClass.vtl
*/
package com.movie.struts.action;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.actions.DispatchAction;
import biz.UserBiz;
import biz.impl.UserBizImpl;
import com.movie.struts.form.LoginForm;
import entity.*;
/**
* MyEclipse Struts
* Creation date: 11-22-2009
*
* XDoclet definition:
* @struts.action path="/login" name="loginForm" parameter="useroperation" scope="request" validate="true"
* @struts.action-forward name="succsee" path="movielist.jsp"
* @struts.action-forward name="error" path="error.jsp"
*/
public class LoginAction extends DispatchAction {
/*
* Generated Methods
*/
/**
* Method execute
* @param mapping
* @param form
* @param request
* @param response
* @return ActionForward
*/
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) {
LoginForm loginForm = (LoginForm) form;// TODO Auto-generated method stub
String name =loginForm.getUser().getUsername();
String pwd =loginForm.getUser().getPassword();
UserBiz userBiz = new UserBizImpl();
System.out.println(name);
System.out.println(pwd);
int num = userBiz.login(name, pwd) ;
if(num>0)
{
return mapping.findForward("movielist");
}else{
return mapping.findForward("error");
}
}
}
=========================loginForm.java页面==============
/*
* Generated by MyEclipse Struts
* Template path: templates/java/JavaClass.vtl
*/
package com.movie.struts.form;
import javax.servlet.http.HttpServletRequest;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;
import entity.User;
/**
* MyEclipse Struts
* Creation date: 11-22-2009
*
* XDoclet definition:
* @struts.form name="loginForm"
*/
public class LoginForm extends ActionForm {
/*
* Generated fields
*/
/** user property */
private User user;
/*
* Generated Methods
*/
/**
* Method validate
* @param mapping
* @param request
* @return ActionErrors
*/
public ActionErrors validate(ActionMapping mapping,
HttpServletRequest request) {
// TODO Auto-generated method stub
return null;
}
/**
* Method reset
* @param mapping
* @param request
*/
public void reset(ActionMapping mapping, HttpServletRequest request) {
// TODO Auto-generated method stub
}
/**
* Returns the user.
* @return User
*/
public User getUser() {
return user;
}
/**
* Set the user.
* @param user The user to set
*/
public void setUser(User user) {
this.user = user;
}
}
===============struts-config.xml===============
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN" "http://struts.
<struts-config>
<data-sources />
<form-beans >
<form-bean name="loginForm" type="com.movie.struts.form.LoginForm" />
</form-beans>
<global-exceptions />
<global-forwards />
<action-mappings >
<action
attribute="loginForm"
name="loginForm"
path="/login"
scope="request"
type="com.movie.struts.action.LoginAction">
<forward name="succsee" path="/movielist.jsp" />
<forward name="error" path="/error.jsp" />
</action>
</action-mappings>
<message-resources parameter="com.movie.struts.ApplicationResources" />
</struts-config>
======================login.jsp============================
<%@ page language="java" pageEncoding="utf-8"%>
<%@ taglib uri="http://struts. prefix="bean"%>
<%@ taglib uri="http://struts. prefix="html"%>
<html>
<head>
<title>JSP for LoginForm form</title>
</head>
<body>
<form action="login.do" method="post">
<table align="center" valign="middle">
<tr>
<td>用户名：</td>
<td><input type="text" name="username"></td>
</tr>
<tr>
<td>密码：</td>
<td><input type="password" name="pwd"></td>
</tr>
<tr>
<td></td>
<td><input type="submit" value="登陆" class="textLine"> <input type="reset" value="重置"></td>
</tr>
</table>
</form>
</body>
</html>
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[ 本帖最后由 沉墨小菜鸟 于 2009-11-23 14:07 编辑 ]
