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struts2 请求参数 :封装成集合数据

xiaoxiao2022-05-13  4


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1.封装到List a. 编写测试页面login4.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> <h1>演示参数封装到list</h1> <form action="login4.action" method="post"> 用户名1:<input type="text" name="users[0].username"><br> 密码1:<input type="password" name="users[0].password"><br> 用户名2:<input type="text" name="users[1].username"><br> 密码2:<input type="password" name="users[1].password"><br> 用户名3:<input type="text" name="users[2].username"><br> 密码3:<input type="password" name="users[2].password"><br> <input type="submit" value="登录"> </form> </body> </html>

编写Login4Action类:

public class Login4Action extends ActionSupport{ private static final long serialVersionUID = 1L; private List<User> users;//接收多个User对象 @Override public String execute() throws Exception { for (User user : users) { System.out.println(user); } return NONE; } public void setUsers(List<User> users) { this.users = users; } public List<User> getUsers() { return users; } }

在struts.xml中配置Login4Action类:

<action name="login4" class="cn.icbc.action.Login4Action"></action>

测试结果如下:

2…封装到Map 注:查看jsp页面传入参数的name属性值得写法。

用户名1:<input type="text" name="users['one'].username"><br>

新建login5.jsp页面:

<%@ 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> <h1>演示参数封装到Map</h1> <form action="login5.action" method="post"> 用户名1:<input type="text" name="users['one'].username"><br> 密码1:<input type="password" name="users['one'].password"><br> 用户名2:<input type="text" name="users['two'].username"><br> 密码2:<input type="password" name="users['two'].password"><br> 用户名3:<input type="text" name="users['three'].username"><br> 密码3:<input type="password" name="users['three'].password"><br> <input type="submit" value="登录"> </form> </body> </html>

新建Login5Action类:

package com.icbc.struts.study2; import java.util.Map; import java.util.Set; import com.opensymphony.xwork2.ActionSupport; public class Login5Action extends ActionSupport { private static final long serialVersionUID = 1L; private Map<String,User> users; @Override public String execute() throws Exception { Set<String> keys = users.keySet(); for (String key : keys) { System.out.println(key + ":" + users.get(key)); } return NONE; } public Map<String, User> getUsers() { return users; } public void setUsers(Map<String, User> users) { this.users = users; } }

在struts.xml中配置Login5Action:

<action name="login5" class="cn.icbc.action.Login5Action"></action>

测试结果如下:


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