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7.Struts2复杂类型数据的接受

复合类型数据的接收
所谓复合类型数据是指,一个JavaBean实例的属性值,而这些值又作为参数传递给Action。
Action若要接收这些数据,需要做到以下几点:
(1)定义Action时,将该Bean的实例定义为该Action的属性,并赋予其get与set方法。
(2)参数的形式为:bean实例.属性
(3)若复合型数据还需要在视图中显示,如在EL表达式中出现,其出现形式也为:bean实例.属性

源码文档建立目录如下:

Complex_Params_Action.java源码如下:

package actions;import dto.UserDto;public class Complex_Params_Action {    private UserDto user;    public UserDto getUser() {        return user;    }    public void setUser(UserDto user) {        this.user = user;    }        public String execute(){        System.out.println("user:"+user);        return "success";    }    }

UserDto.java源码如下:

package dto;public class UserDto {    private String username;    private int age;    public String getUsername() {        return username;    }    public void setUsername(String username) {        this.username = username;    }    public int getAge() {        return age;    }    public void setAge(int age) {        this.age = age;    }        public String toString(){        return "username="+username+",age="+age;    }}

index.jsp源码如下:

<%@ page  pageEncoding="UTF-8"%><html>  <head>        <title>注册页面</title>  </head>    <body>           <form action="complex.action" method="post">           用户名<input type="text" name="user.username"/><br/>           年龄<input type="text" name="user.age"/><br/>           <input type="submit" value="注册"/>           </form>  </body></html>

welcome.jsp源码如下:

<%@ page pageEncoding="utf-8" isELIgnored="false"%><html>  <head>        <title>welcome page</title>  </head>    <body>        用户名:${user.username}<br/>        年龄:${user.age}     </body></html>

web.xml配置文档如下:

<?xml version="1.0" encoding="UTF-8"?><web-app version="2.5"     xmlns="http://java.sun.com/xml/ns/javaee"     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"     xsi:schemaLocation="http://java.sun.com/xml/ns/javaee     http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">            <filter>        <filter-name>struts2</filter-name>        <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>        </filter>        <filter-mapping>        <filter-name>struts2</filter-name>        <url-pattern>/*</url-pattern>        </filter-mapping>      <welcome-file-list>    <welcome-file>index.jsp</welcome-file>  </welcome-file-list></web-app>

struts.xml配置如下:

<?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>    <package name="one" extends="struts-default">            <action name="complex" class="actions.Complex_Params_Action">            <result>/welcome.jsp</result>        </action>            </package></struts>

重新部署发布,启动tomcata,地址输入:

http://127.0.0.1:8080/receive_complex_params/

 

7.Struts2复杂类型数据的接受