fastjson json数据处理

Posted 2021-03-10 18513757531

 

1         <dependency>
2             <groupId>com.alibaba</groupId>
3             <artifactId>fastjson</artifactId>
4             <version>1.2.58</version>
5         </dependency>

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 1 package com.baidu.com;
 2 
 3 
 4 
 5 import java.util.Map;
 6 
 7 import com.alibaba.fastjson.JSON;
 8 import com.alibaba.fastjson.JSONArray;
 9 import com.alibaba.fastjson.JSONObject;
10 
11 
12 public class JsonTest {
13 
14     public static void main(String[] args) {
15         // TODO Auto-generated method stub
16         String jsonString = "
" + 
17                 "{
" + 
18                 "    "count":20,
" + 
19                 "    "start":0,
" + 
20                 "    "total":641,
" + 
21                 "    "books":[
" + 
22                 "        {
" + 
23                 "            "id":"4866934",
" + 
24                 "            "title":"Python基础教程"
" + 
25                 "        },
" + 
26                 "        {
" + 
27                 "            "id":"3117898",
" + 
28                 "            "title":"Python源码剖析"
" + 
29                 "        },
" + 
30                 "        {
" + 
31                 "            "id":"3948354",
" + 
32                 "            "title":"Python学习手册"
" + 
33                 "        },
" + 
34                 "        {
" + 
35                 "            "id":"3884108",
" + 
36                 "            "title":"可爱的Python"
" + 
37                 "        }
" + 
38                 "        ]
" + 
39                 "}";
40         //串转json
41         JSONObject result01 = (JSONObject) JSON.parse(jsonString);
42         System.out.println(result01);
43 
44         //获取json数组
45         System.out.println(result01.get("total"));
46         //判断json的value的数据类型
47         System.out.println(result01.get("total").toString().startsWith("641"));
48         //result01.get
49         JSONArray result02 = result01.getJSONArray("employees");
50     
51         System.out.println("33");
52         
53         // json数据中下一维度所有key字段获取
54         JSONObject jsonObj = JSON.parseObject(jsonString);
55         for (Map.Entry<String, Object> entry : jsonObj.entrySet()) {
56                System.out.println(entry.getKey() + ":" + entry.getValue());
57 
58         }    
59     }
60 
61 }

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