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java 解析Json对象（嵌套json数组）

2016-09-08 16:39 645 查看

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

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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标签： java json

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