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/
