Struts2之动态方法调用（优点：调用同一个action中的多个方法不需要在配置文件中写多个指向相同action类的的action节点只需要一个action节点就行）

时间：2015-02-02 14:14:39 阅读：117 评论：0 收藏：0 [点我收藏+]

在表单action值里指定所调用的action中的哪个方法而不是借助配置文件action节点的method属性

1 UserAction类

package org.action;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;

import org.apache.struts2.ServletActionContext;
import org.model.User;

import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;

public class UserAction extends ActionSupport implements
ModelDriven<User/*这里需要填写Person对象*/> {
   //这种实现ModelDriven的模型驱动需要的模型要实例化
   private User user=new User();
   public User getUser() {
       return user;
   }
   public void setUser(User user) {
       this.user = user;
   }
   public String add() {
       return "add";
   }

   @Override
   public String execute() throws Exception {
       // TODO Auto-generated method stub
       return "minus";
   }
   @Override
   public User getModel() {
       // TODO Auto-generated method stub
       return user;
   }

}

2model类

package org.model;

public class User {
   private String name;
   private String password;
   public String getPassword() {
       return password;
   }
   public void setPassword(String password) {
       this.password = password;
   }
   public String getName() {
       return name;
   }
   public void setName(String name) {
       this.name = name;
   }

}

3struts.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd">
<struts>
<constant name="struts.enable.DynamicMethodInvocation" value="true" > </constant>
   <package name="default" extends="struts-default">
       <action name="getuser" class="org.action.UserAction">
           <result name="add">/success.jsp</result>
           <result name="minus">/error.jsp</result>
           <interceptor-ref name="modelDriven"></interceptor-ref>
            <interceptor-ref name="defaultStack"></interceptor-ref>
       </action>


   </package>
</struts>

4首页

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
    <base href="<%=basePath%>">

    <title>My JSP ‘index.jsp‘ starting page</title>
   <meta http-equiv="pragma" content="no-cache">
   <meta http-equiv="cache-control" content="no-cache">
   <meta http-equiv="expires" content="0">
   <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
   <meta http-equiv="description" content="This is my page">
   
</head>

<body>
    <form action="getuser!add" method="post"> 注：action值可以改成getuser就会调用默认方法excute
    用户名：<input type="text" name="user.name"><br>
    密码：<input type="text" name="user.password">
    <input type="submit" value="提交">
    </form>
</body>
</html>
5 转发页面error.jsp

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@ taglib uri="/struts-tags" prefix="s" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
    <base href="<%=basePath%>">

    <title>My JSP ‘error.jsp‘ starting page</title>

   <meta http-equiv="pragma" content="no-cache">
   <meta http-equiv="cache-control" content="no-cache">
   <meta http-equiv="expires" content="0">
   <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
   <meta http-equiv="description" content="This is my page">
   

</head>

<body>
   username：<s:property value="user.name" /><br>
password：<s:property value="user.password" />
</body>
</html>

6转发页面 success.jsp

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@ taglib uri="/struts-tags" prefix="s" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
    <base href="<%=basePath%>">

    <title>My JSP ‘success.jsp‘ starting page</title>

   <meta http-equiv="pragma" content="no-cache">
   <meta http-equiv="cache-control" content="no-cache">
   <meta http-equiv="expires" content="0">
   <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
   <meta http-equiv="description" content="This is my page">
   

</head>

<body>
用户名：<s:property value="user.name" /><br>
密码：<s:property value="user.password" />
</body>
</html>