Action中接收参数的方式

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在Action接收参数的方式有3种：

直接使用属性对应
使用对像接收
实现ModelDriven接口

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><h3>1.使用属性接收</h3><form action="user/common!login" method="post">name:<input type="text" name="name"/>password:<input type="password" name="password"/><input type="submit" value="login" /></form><h3>2.使用对象接收</h3><form action="user/common!login2" method="post">name:<input type="text" name="user.name"/>password:<input type="password" name="user.password"/><input type="submit" value="login" /></form><h3>2.实现ModelDriven接口</h3><form action="user/common!login3" method="post">name:<input type="text" name="name"/>password:<input type="password" name="password"/><input type="submit" value="login" /></form></body></html>

UserAction

package com.deppon.demo.struts;import com.deppon.demo.entity.UserEntity;import com.opensymphony.xwork2.ActionSupport;import com.opensymphony.xwork2.ModelDriven;public class UserAction extends ActionSupport implements ModelDriven<UserEntity>{private static final long serialVersionUID = 7146977447328113550L;private String name;private String password;private UserEntity user;private UserEntity userModel = new UserEntity();public UserEntity getModel() {return userModel;}public UserEntity getUser() {return user;}public void setUser(UserEntity user) {this.user = user;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getPassword() {return password;}public void setPassword(String password) {this.password = password;}/** * 使用属性的方式，直接接收参数 * 当参数较多时，不方便 * @return */public String login() {System.out.println("name->" + name + ",password->" + password);return SUCCESS;}/** * 使用对象接收 * 需要加前缀，和变量名一致 * @return */public String login2() {System.out.println("user->" + user);return SUCCESS;}/** * 是想ModelDriven接口 * @return */public String login3() {System.out.println("userModel->" + userModel);return SUCCESS;}}

UserEntity

package com.deppon.demo.entity;import java.io.Serializable;public class UserEntity implements Serializable {private static final long serialVersionUID = -1467621300783425180L;private String name;private String password;public String getName() {return name;}public void setName(String name) {this.name = name;}public String getPassword() {return password;}public void setPassword(String password) {this.password = password;}@Overridepublic String toString() {return "UserEntity [name=" + name + ", password=" + password + "]";}}

struts.xml

<?xml version="1.0" encoding="UTF-8" ?><!DOCTYPE struts PUBLIC    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"    "http://struts.apache.org/dtds/struts-2.0.dtd"><struts><constant name="struts.i18n.encoding" value="utf-8"></constant><constant name="struts.multipart.maxSize" value="20971520"/>    <constant name="struts.devMode" value="true" />        <package name="p_user" namespace="/user" extends="struts-default">    <action name="common" class="com.deppon.demo.struts.UserAction">    <result type="redirect">/index.jsp</result>    </action>        </package></struts>