json部分操作

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<%@ 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>
<script type="text/javascript" src="/springMVC6/js/jquery-1.7.2.js"></script>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<script type="text/javascript">

$(document).ready(function(){
//传递字符串格式json对象到后台（一个json对象）
$("#resolveJsonObject").click(function(){
var userName =encodeURI($("#userName").attr("value"));
var age = encodeURI($("#age").attr("value"));

var user = {userName:userName,age:age};
var aMenu = encodeURI(JSON.stringify(user));

$.ajax({
url:"/springMVC6/user/data/resolveJsonObject" ,
data:"orderJson=" + aMenu,
success:function(data){

}
});
});

//传递json数组到后台
$("#resolveJsonArray").click(function(){
var userName =encodeURI($("#userName").attr("value"));
var age = encodeURI($("#age").attr("value"));

//数组开始
var user1 = {userName:userName,age:age};
var allMenu={
"menu":[ ]
};
allMenu.menu.push(user1);
var allMenu1 = encodeURI(JSON.stringify(allMenu));

$.ajax({
//json数组
url:"/springMVC6/user/data/resolveJsonArray" ,
data:"orderJson=" + allMenu1,
success:function(data){

}
});
});

//接收后台的json在前台解析
$("#resolveJson").click(function(){

$.ajax({
//解析从后台返回的json数据
url:"/springMVC6/user/data/resolveJson" ,
type:"post",
success:function(data){
var arr=eval(data);
alert(arr.length);
for(var m = 0;m<arr.length;m++){
alert(arr[m].user.userName);
}
}
});
});
});

</script>
</head>
<body>
<h1>json添加用户</h1>

姓名：<input id="userName" type="text" name="userName">
年龄:<input id="age" type="text" name="age"><br>
<input type="button" id="resolveJsonObject" value="json对象">
<input type="button" id="resolveJsonArray" value="json数组">
<input type="button" id="resolveJson" value="前端解析json字符串">
</body>
</html>

package com.tgb.web.controller.annotation;

import java.io.IOException;
import java.net.URLDecoder;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import com.tgb.web.controller.entity.User;

@Controller
@RequestMapping("/user/data")
public class DataController {

//接收前台传过来的字符串格式的json对象，在后台进行解析
@RequestMapping("/resolveJsonObject" )
public void resolveJsonObject(HttpServletRequest request,HttpServletResponse response) throws IOException {
//解码
String str = URLDecoder.decode(request.getParameter("orderJson"),"UTF-8");
JSONObject jb=new JSONObject();
//将json格式的字符串转换为json对象，并取得该对象的“userName”属性值
String o=(String)jb.fromObject(str).get("userName");
System.out.println(o);
}

//传递json数组字符串
@RequestMapping("/resolveJsonArray" )
public void resolveJsonArray(HttpServletRequest request,HttpServletResponse response) throws IOException {
//解码，为了解决中文乱码
String str = URLDecoder.decode(request.getParameter("orderJson"),"UTF-8");
JSONObject jb=new JSONObject();
//将json格式的字符串转换为json数组对象
JSONArray array=(JSONArray)jb.fromObject(str).get("menu");
//取得json数组中的第一个对象
JSONObject o = (JSONObject) array.get(0);//获得第一个array结果
//取出json数组中第一个对象的“userName”属性值
String name=o.get("userName").toString();//获得属性值
System.out.println(name);
}

//通过该函数返回json格式的数据，在前台通过JQuery进行解析
@RequestMapping("/resolveJson" )
public void resolveJson(HttpServletRequest request,HttpServletResponse response) throws IOException {

List m = (List) new ArrayList();
JSONArray jsons = new JSONArray();
for(int i=0;i<10;i++){
User user = new User();
user.setUserName("name_" + i);
m.add(user);
}

for(int j=0;j<m.size();j++){
JSONObject jsonObject = new JSONObject();
jsonObject.put("user", m.get(j));
jsons.add(jsonObject);
}
response.getWriter().print(jsons.toString()) ;
}

@RequestMapping("/toJson" )
public String toJson() {
return "/json";
}
}

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