（一）Jsp页面代码
<%@ 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%>"> <title>My JSP 'index.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="styles.css" mce_href="styles.css"> --> <script type="text/javascript" src="js/jquery-1.6.1.js" mce_src="js/jquery-1.6.1.js"></script> <script type="text/javascript"> $(function(){ $("#str").click(function(){ $.ajax({ type: "post", url: "jsonTest/str.action", dataType: "json", data: {"name":"pyz","age":"30"}, beforeSend: function(XMLHttpRequest){ //ShowLoading(); $("#str").val("正在处理中..."); }, success: function(data){ alert("字符串:" + data); }, complete: function(XMLHttpRequest, textStatus){ //HideLoading(); $("#str").val("已处理完成"); }, error: function(){ //请求出错处理 alert("error"); } }); }); $("#keyValue").click(function(){ $.ajax({ type: "post", url: "jsonTest/keyValue.action", dataType: "json", data: {"name":"pyz","age":"30"}, beforeSend: function(XMLHttpRequest){ //ShowLoading(); $("#keyValue").val("正在处理中..."); }, success: function(data){ var jo = eval("("+data+")"); alert("姓名:" + jo.name + " 年龄:"+ jo.age); }, complete: function(XMLHttpRequest, textStatus){ //HideLoading(); $("#keyValue").val("已处理完成"); }, error: function(){ //请求出错处理 alert("error"); } }); }); $("#objList").click(function(){ $.ajax({ type: "post", url: "jsonTest/objList.action", dataType: "json", data: {"name":"pyz","age":"30"}, beforeSend: function(XMLHttpRequest){ //ShowLoading(); $("#objList").val("正在处理中..."); }, success: function(data){ var jo = eval("("+data+")"); var buf="" ; //遍历json返回数据 $(jo).each(function(i,item){ buf += "姓名:"; buf += item.name; buf += " 年龄:"; buf += item.age; buf += "/r/n"; }); alert(buf); }, complete: function(XMLHttpRequest, textStatus){ //HideLoading(); $("#objList").val("已处理完成"); }, error: function(){ //请求出错处理 alert("error"); } }); }); }); </script> </head> <body> <input type="button" id="keyValue" value="提交/接收数据（键值对）" /> <br> <input type="button" id="str" value="接收字符串" /> <br> <input type="button" id="objList" value="接收对象列表" /> <br> </body> </html>
（二）Action代码
package com.pyz.action;
import java.util.HashMap;
import java.util.Map;
import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
import net.sf.json.JSONSerializer;
import org.apache.struts2.ServletActionContext;
import org.apache.struts2.convention.annotation.Action;
import org.apache.struts2.convention.annotation.ParentPackage;
import org.apache.struts2.convention.annotation.Result;
import com.opensymphony.xwork2.ActionSupport;
@ParentPackage("json-default")
public class JsonTestAction extends ActionSupport {
private static final long serialVersionUID = 1L;
//返回json格式的数据
private String result;
@Action(
value="/jsonTest/str",
results={
@Result(name="success", type="json", params={"root","result"})
}
)
public String str(){
String name = ServletActionContext.getRequest().getParameter("name");
String age = ServletActionContext.getRequest().getParameter("age");
this.result = "aaa";
return SUCCESS;
}
@Action(
value="/jsonTest/keyValue",
results={
@Result(name="success", type="json", params={"root","result"})
}
)
public String keyValue(){
String name = ServletActionContext.getRequest().getParameter("name");
String age = ServletActionContext.getRequest().getParameter("age");
// //方法一，直接创建JSON对象
// JSONObject jo = new JSONObject();
// jo.element("name", name);
// jo.element("age", age);
// //方法二，JAVABEAN转JSON对象
// User user = new User();
// user.setName("pyz");
// user.setAge(19);
// JSONObject jo = (JSONObject)JSONObject.fromObject(user);
// //JSONObject jo = (JSONObject)JSONSerializer.toJSON(user);//等于上语句
//方法三，MAP转JSON对象
Map<String, Object> map = new HashMap<String, Object>();
map.put("name", "pyz");
map.put("age", 19);
JSONObject jo = (JSONObject)JSONObject.fromObject(map);
//JSONObject jo = (JSONObject)JSONSerializer.toJSON(user);//等于上语句
this.result = jo.toString();
return SUCCESS;
}
@Action(
value="/jsonTest/objList",
results={
@Result(name="success", type="json", params={"root","result"})
}
)
public String objList(){
String name = ServletActionContext.getRequest().getParameter("name");
String age = ServletActionContext.getRequest().getParameter("age");
//方法一，直接创建JSON对象
JSONObject jo = new JSONObject();
jo.element("name", name);
jo.element("age", age);
JSONObject jo1 = new JSONObject();
jo1.element("name", "ty");
jo1.element("age", "29");
//同理，可以将JAVABEAN、MAP对象转换成JSON对象，再添加到JSONArray中
JSONArray ja = new JSONArray();
ja.add(jo);
ja.add(jo1);
this.result = ja.toString();
return SUCCESS;
}
public String getResult() {
return result;
}
public void setResult(String result) {
this.result = result;
}
public class User{
private String name;
private int age;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
}
}