java 解析Json对象（嵌套json数组）

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在这里我需要读取的是json数据中promote的img的url，name，shopPrice。
1.实体类
这里写图片描述

2.工具类Moblie_Utils根据url获取网络json格式数据

public class Moblie_Utils {public static String loadJson(String url) {    StringBuilder json = new StringBuilder();    try {        URL urlObject = new URL(url);        URLConnection uc = urlObject.openConnection();        BufferedReader in = new BufferedReader(new InputStreamReader(uc.getInputStream()));        String inputLine = null;        while ((inputLine = in.readLine()) != null) {            json.append(inputLine);        }     //   System.out.println("json.toString()====="+json.toString());        in.close();    } catch (MalformedURLException e) {        e.printStackTrace();    } catch (IOException e) {        e.printStackTrace();    }    return json.toString();}}

3.json数据格式,json中包含嵌套json数组

  {"data": {    "promote": [        {            "id": 24,            "goods_id": 24,            "brief": null,            "img": {                "thumb": "http://image/1_0.jpg",                "url": "http://image/1_0.jpg",                "small": "http://image/1_0.jpg"            },            "market_price": "0.0",            "name": "F2000",            "promote_price": "",            "shop_price": "0.01"        },        {            "id": 92,            "goods_id": 92,            "brief": null,            "img": {                "thumb": "http://image/1_0.jpg",                "url": "http://image/1_0.jpg",                "small": "http://image/1_0.jpg"            },            "market_price": "0.0",            "name": "23000",            "promote_price": "",            "shop_price": "0.01"        }    ],    "player": [        {            "action": null,            "action_id": null,            "description": null,            "photo": {                "thumb": null,                "url": "http://image/1_0.jpg",                "small": null            },            "url": ""        },        {            "action": null,            "action_id": null,            "description": null,            "photo": {                "thumb": null,                "url": "http://image/1_0.jpg",                "small": null            },            "url": ""        }    ]},"status": {    "succeed": 1,    "error_code": null,    "error_desc": null},"paginated": null,"session": null

}

4.控制层controller中

@Controller@RequestMapping("/moblieHome")public class Moblie_IndexController {   @RequestMapping(value = "/hotSale",produces = "text/html;charset=UTF-8")    public String mobileHomeCategory(Model model){    String url="http://xxxxx/home/data";    String homeDataJsonArrayString=Moblie_Utils.loadJson(url);    JSONObject jsonObject=null;    jsonObject= JSON.parseObject(homeDataJsonArrayString);    String data=jsonObject.getString("data");    if(data!=null &&data.length()>0){        System.out.println("data==="+data);    }    jsonObject= JSON.parseObject(data);    String promote_goods=jsonObject.getString("promote_goods");    if(data!=null &&data.length()>0){        System.out.println("promote_goods==="+promote_goods);    }    JSONArray jsonArray =jsonObject.getJSONArray("promote_goods");    JSONArray jsonArrayImg=null;    JSONObject object=null;    JSONObject objectImg=null;    List<MobileGoodsBrief> goodsList = new ArrayList<MobileGoodsBrief>();    MobileGoodsBrief good=null;    if(jsonArray!=null && jsonArray.size()>0) {        for (int i = 0; i < jsonArray.size(); i++) {            object = jsonArray.getJSONObject(i);        good=new MobileGoodsBrief();            good.setShopPrice(object.getString("shop_price"));            good.setPrice(object.getString("market_price"));            good.setName(object.getString("name"));            objectImg = JSON.parseObject(object.getString("img").toString());            good.setImgUrl(objectImg.getString("url"));            goodsList.add(good);        }    }    model.addAttribute("goodsList",goodsList);    return "index.jsp";}

5.controller传值给jsp,
jsp头部注意添加c标签：

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%><%@ taglib prefix="t" uri="http://tiles.apache.org/tags-tiles"%><%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%><!DOCTYPE html><html><head></head><body><div><ul class="good"><c:forEach items="${goodsList}" var="t"><li>    <a target="_blank" href="jump/67939165">        <img src="${t.imgUrl}"/>    </a>    <a target="_blank" href="jump/67939165">    <h1><i class="ico13"><img src="${t.imgUrl}"></i> ${t.name}</h1>    <div class="list-price buy">        <i>￥</i><span class="price-new">${t.shopPrice}</span>        <i class="del">/￥${t.price}</i>        <span class="good-btn"><i class="ico15">        <img src="images/sts.png"/>        </i> 去抢购         </span>    </div>    </a></li></c:forEach></ul></div></body></html>

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