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/
