java 解析Json对象（嵌套json数组）-蒲公英云

java 解析Json对象（嵌套json数组）

野性酷女 2023-07-13 10:56 209阅读 0赞

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
20160908161534292

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>