这篇文章主要介绍了php array 转json及java 转换 json数据格式操作,结合实例形式分析了PHP针对array数组转json以及Java操作Map、List、对象与json格式转换的相关实现技巧,需要的朋友可以参考下。

本文实例讲述了php array 转json及java 转换 json数据格式操作，分享给大家供大家参考，具体如下：

php array 转json 数据

1. $arr = array(
2. "demo1" => "my demo1",
3. "demo2" => array(
4. "demo2_demo1"=>"aaaaaaaa",
5. "demo2_demo2"=>"bbbbbbbb",
6. "demo2_demo3"=>array(
7. "demo2_demo3_demo1"=>"ccccccc"
8. )
9. ),
10. "demo3" => 22
11. );
12. $json_str = json_encode($arr,true);
13. $arr = json_decode($json_str,true);
14. var_dump($json_str);
15. var_dump($arr);

查看结果

运行结果：

1. string(137) "{"demo1":"my demo1","demo2":{"demo2_demo1":"aaaaaaaa","demo2_demo2":"bbbbbbbb","demo2_demo3":{"demo2_demo3_demo1":"ccccccc"}},"demo3":22}"
2. array(3) {
3. ["demo1"]=>
4. string(8) "my demo1"
5. ["demo2"]=>
6. array(3) {
7. ["demo2_demo1"]=>
8. string(8) "aaaaaaaa"
9. ["demo2_demo2"]=>
10. string(8) "bbbbbbbb"
11. ["demo2_demo3"]=>
12. array(1) {
13. ["demo2_demo3_demo1"]=>
14. string(7) "ccccccc"
15. }
16. }
17. ["demo3"]=>
18. int(22)
19. }

java json数据格式转换依赖包

commons-beanutils-1.8.3.jar,

commons-collections-3.2.1.jar,

commons-lang-2.6.jar,

commons-logging-1.1.1.jar,

ezmorph-1.0.6.jar,

json-lib-2.4-jdk15.jar,

添加至构建路径。

1. package Main;
2. import net.sf.json.JSONObject;
3. import net.sf.json.JSONArray;
4. import java.util.Map;
5. import java.util.HashMap;
6. import java.util.List;
7. import java.util.ArrayList;
8. import Main.Demo1;
9. public class Index
10. {
11. public static void main(String[] args)
12. {
13. index4();
14. }
15. /**
16. * 简单的simple
17. * */
18. public static void index1()
19. {
20. JSONObject json = new JSONObject();
21. json.element("name","谭勇");
22. json.element("age",22);
23. System.out.println(json.toString());
24. }
25. /**
26. * Map 数据转json
27. * */
28. public static void index2()
29. {
30. JSONObject json = new JSONObject();
31. Map<String,String> map = new HashMap<String,String>();
32. map.put("name", "谭勇");
33. map.put("age", "22");
34. json.accumulateAll(map);
35. System.out.println(json.toString());
36. }
37. /**
38. * List<Map> 转json
39. * */
40. public static void index3()
41. {
42. JSONArray arr = new JSONArray();
43. List<Map<String,String>> list = new ArrayList<Map<String,String>>();
44. list.add(getMap("name","谭勇"));
45. list.add(getMap("age","22"));
46. arr.addAll(list);
47. System.out.println(arr.toString());
48. }
49. /**
50. * 对象转Json
51. * */
52. public static void index4()
53. {
54. Demo1 demo1 = new Demo1();
55. demo1.setName("谭勇");
56. demo1.setAge(22);
57. JSONObject json = new JSONObject();
58. JSONArray arr = new JSONArray();
59. json.element("demo1",demo1);
60. arr.add(demo1);
61. //json.containsKey(demo1);
62. System.out.println(json.toString());
63. System.out.println(arr.toString());
64. }
65. private static Map<String,String> getMap(String key,String val)
66. {
67. Map<String,String> map = new HashMap<String,String>();
68. map.put(key, val);
69. return map;
70. }
71. }

Demo1.java

1. package Main;
2. public class Demo1
3. {
4. private String name;
5. private int age;
6. public void setName(String name)
7. {
8. this.name = name;
9. }
10. public String getName()
11. {
12. return this.name;
13. }
14. public void setAge(int age)
15. {
16. this.age = age;
17. }
18. public int getAge()
19. {
20. return this.age;
21. }
22. }

更多关于 JSONObject 提供的方法 JSONArray 提供的方法 自己探索。