How to convert json object into map key-value pair in Java

Tool method: The purpose of this article is to convert the json string into a map key-value pair storage, and only store the data of the leaf nodes

maven reference jar package version:

2. <dependency>
3. <groupId>org.json</groupId>
4. <artifactId>json</artifactId>
5. <version>20090211</version>
6. </dependency>

copy code

Tools:

2. package com.baofoo.admin.test;
3. //import com.alibaba.fastjson.JSONObject;
4. import lombok.extern.slf4j.Slf4j;
5. import org.junit.Test;
6. import org.json.*; Jiangsu Surrogacy
7. import java.util.*;   Jiangsu Surrogacy Company
8. /**
9. * Created by BF100 on 2018/4/12.
10. */
11. @ Slf4j
12. public class TestByCaoxNew {
13. [url=home.php?mod=space&uid=5447]@test[/url]
14. public void test1(){
15. try{
16. int a = 1/0;
17. }catch (Exception e){
18. log.error("call Exception :{}",e);
19. e.printStackTrace ();
20. }
21. System.out.println("come on !!!");
22. }
23. @Test
24. public void test2() throws Exception{
25. String str = "{\"result\":\"success\",\"message\":\"成功！\"}";
26. String str2 = "{result:success,message:成功}";
27. // JSONObject jsStr = JSONObject.parseObject(str);
28. // System.out.println(jsStr);
29. JSONObject obj = new JSONObject(str);
30. Stack<JSONObject> stObj = new Stack<JSONObject>();
31. stObj.push(obj);
32. Map<String, Object> resultMap =new HashMap<String, Object>();
33. JsonToMap(stObj,resultMap);
34. Set<String> keys = resultMap.keySet();
35. for (String key:keys){
36. System.out.println(key+"："+resultMap.get(key));
37. }
38. }
39. /**
40. * @Author：sks
41. * @Description: Store the json object data in the map in the form of key-value pairs, only store leaf nodes
42. * @Date：
43. */
44. private static void JsonToMap(Stack<JSONObject> stObj, Map<String, Object> resultMap) throws Exception {
45. if(stObj == null && stObj.pop() == null){
46. return ;
47. }
48. JSONObject json = stObj.pop();
49. Iterator it = json.keys();
50. while(it.hasNext()){
51. String key = (String) it.next();
52. //get the value of value
53. Object value = json.get(key);
54. //System.out.println(value);
55. if(value instanceof JSONObject)
56. {
57. stObj.push((JSONObject)value);
58. // recursively traverse
59. JsonToMap(stObj,resultMap);
60. }
61. else {
62. resultMap.put(key, value);
63. }
64. }
65. }
66. @Test
67. public void test3() throws Exception{
68. String jsonStr ="{responseHeader:{status:0,QTime:0},spellcheck:{suggestions:{中国:{numFound:9,startOffset:0,endOffset:2," +
69. "suggestion:[Industrial and Commercial Bank of China, Chinese People, China International, Chinese Agriculture, Chinese Market, Chinese Economy, Chinese, Chinese Broadcasting, Chinese Culture]}}," +
70. "collations:{collation:ICBC}}}";
71. JSONObject obj = new JSONObject(jsonStr);
72. Stack<JSONObject> stObj = new Stack<JSONObject>();
73. stObj.push(obj);
74. Map<String, Object> resultMap =new HashMap<String, Object>();
75. JsonToMap(stObj,resultMap);
76. Set<String> keys = resultMap.keySet();
77. for (String key:keys){
78. System.out.println(key+"："+resultMap.get(key));
79. }
80. }
81. }