本文主要包含一个struts2+ajax+json的使用实例
步骤如下
1.准备工作
①ajax使用Jquery：jquery-1.4.2.min.js
②struts2与json的依赖包：struts2-json-plugin-2.2.3.jar,json-lib
PS：版本可自己控制！~
2.过程
①引入json依赖包
②编写action类
③配置struts.xml
④编写页面
⑤测试
参考链接
struts2 + ajax + json的结合使用，实例讲解 - tfy1332的专栏 - 博客频道 - CSDN.NET
Struts2 和 Ajax 交互 - - ITeye技术网站
Java中：struts2+jQuery+ajax调用演示 - anyx的专栏 - 博客频道 - CSDN.NET
实例
action类
package com.zxt.action;import java.util.ArrayList;
import java.util.List;import com.opensymphony.xwork2.ActionSupport;public class JsonAction extends ActionSupport {/*** */private static final long serialVersionUID = 7443363719737618408L;/*** 姓名*/private String name;/*** 身高*/private String inch;/*** ajax返回结果，也可是其他类型的，这里以String类型为例*/private List<PersonBean> result;@Overridepublic String execute() throws Exception {// TODO Auto-generated method stubList<PersonBean> pList = new ArrayList<PersonBean>();if ("张三".equals(name)) {PersonBean p1 = new PersonBean();PersonBean p2 = new PersonBean();p1.setId(1);p1.setName("a");p2.setId(2);p2.setName("b");pList.add(p1);pList.add(p2);result = pList;} else {PersonBean p3 = new PersonBean();PersonBean p4 = new PersonBean();p3.setId(3);p3.setName("c");p4.setId(4);p4.setName("d");pList.add(p3);pList.add(p4);result = pList;}return SUCCESS;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getInch() {return inch;}public void setInch(String inch) {this.inch = inch;}/*** * @Title: getResult* @Description:json调取结果* @param @return* @return String* @throws*/public List<PersonBean> getResult() {return result;}
}struts.xml配置文件
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC"-//Apache Software Foundation//DTD Struts Configuration 2.1.7//EN""http://struts.apache.org/dtds/struts-2.1.7.dtd">
<struts><constant name="struts.devMode" value="true"/><package name="ajax" extends="json-default"><action name="jsonAjax" class="com.zxt.action.JsonAction"><!-- 将返回类型设置为json --><result type="json"></result></action></package>
</struts> web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0" 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_3_0.xsd"><display-name></display-name> <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>index.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%String path = request.getContextPath();String basePath = request.getScheme() + "://"+ request.getServerName() + ":" + request.getServerPort()+ path + "/";
%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>测试</title>
<script type="text/javascript" src="js/jquery-1.4.2.js"></script>
<script type="text/javascript">$(function() {$("#tj").click(function() {//提交的参数，name和inch是和struts action中对应的接收变量/*var data = {"list" : [ {"id" : 1,"content" : "测试信息1111"}, {"id" : 2,"content" : "测试信息2222"} ]};$.each(data.list, function(i, item) {alert(item.id);alert(item.content);});*/var params = {name : $("#xm").val(),inch : $("#sg").val()};$.ajax({type : "POST",url : "jsonAjax.action",data : params,dataType : "text", //ajax返回值设置为text（json格式也可用它返回，可打印出结果，也可设置成json）success : function(json) {var obj = $.parseJSON(json); //使用这个方法解析jsonvar state_value = obj.result; //result是和action中定义的result变量的get方法对应的$.each(state_value, function(i, item) {alert(item.id);alert(item.name);});//alert(state_value);},error : function(json) {alert("json=" + json);return false;}});});});
</script>
</head>
<body><span>姓名：</span><input id="xm" type="text"><br /><span>身高：</span><input id="sg" type="text"><br /><input type="button" value="提交" id="tj">
</body>
</html>本例中的jsp解析了从服务器传来的list，解析list具体方法如下
var data = {"list":[{"id":1,"content":"测试信息1111"},{"id":2,"content":"测试信息2222"}]}$.each(data.list, function(i, item) {alert(item.id);alert(item.content);});
