Struts2 实现JSON输出有2种办法
1、把Action变成Servlet，使用传统做法
2、使用Struts 内置功能完成
二、
1.导入配置，pom.xml，要去struts2的官网下载mvnrepository.com
<dependency> ?????<groupId>junit</groupId> ?????<artifactId>junit</artifactId> ?????<version>3.8.1</version> ?????<scope>test</scope> ???</dependency> ???<dependency> ?????<groupId>org.apache.struts</groupId> ?????<artifactId>struts2-core</artifactId> ?????<version>2.5.13</version> ???</dependency> ???<!-- https://mvnrepository.com/artifact/org.apache.struts/struts2-json-plugin --> ???<dependency> ?????<groupId>org.apache.struts</groupId> ?????<artifactId>struts2-json-plugin</artifactId> ?????<version>2.5.13</version> ???</dependency> ???<!-- https://mvnrepository.com/artifact/com.google.code.gson/gson --> ???<dependency> ?????<groupId>com.google.code.gson</groupId> ?????<artifactId>gson</artifactId> ?????<version>2.8.2</version> ???</dependency>
这些是配置文件的全部内容，第一个是配置好idea自动导入的；
2.一些问题
add添加，alt+enter
3.jps
<%@ 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><script type="text/javascript" src="js/jquery-3.2.1.min.js"></script><script type="text/javascript">$(function(){ ???var MySuccess = function(result){ ???????//alert(result); ???????alert(result.hero); ???}; ???????var MyError = function(){ ???????alert(‘错误‘); ???}; ???????var myClick = function(){ ???????$.ajax({ ???????????url:"testAction", ???????????type:‘POST‘, ???????????//data: ???????????dataType:‘json‘, ???????????success:MySuccess, ???????????timeout:3000, ???????????error:MyError ???????}); ???}; ???????$("#test01").click(myClick); ???????});</script></head><body><div id="test01">获取服务器数据</div></body></html>4.struts
<package name="mypackage" extends="struts-default,json-default"> ???????<!--class一旦加入了spring后，就不再写具体类的路径、名字等--> ???????<action name="testAction" class="com.nf.action.TestAction"> ???????????<!--把Action当Servlet来用，就没有result了--> ???????</action> ???????<action name="testAction2" class="com.nf.action.TestAction2"> ???????????<!--name="success" 可以不写--> ???????????<result type="json"> ???????????????<param name="root">myJson=Map</param> ???????????</result> ???????</action> ???</package>
地址：https://gitee.com/MuNianShi/user7.1.git
Struts学习-json
原文地址：http://www.cnblogs.com/junhua4254/p/7660920.html