本文实例讲述了java对象与json对象之间互相转换实现方法。分享给大家供大家参考,具体如下:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
|
import java.util.ArrayList; import java.util.Collection; import java.util.Iterator; import java.util.List; import net.sf.json.JSONArray; import net.sf.json.JSONObject; public class MainClass { public static void main(String[] args) { TestJsonBean(); TestJsonAttribute(); TestJsonArray(); } @SuppressWarnings ( "rawtypes" ) private static void TestJsonArray() { Student student1 = new Student(); student1.setId( 1 ); student1.setName( "jag" ); student1.setSex( "man" ); student1.setAge( 25 ); student1.setHobby( new String[]{ "篮球" , "游戏" }); Student student2 = new Student(); student2.setId( 2 ); student2.setName( "tom" ); student2.setSex( "woman" ); student2.setAge( 23 ); student2.setHobby( new String[]{ "上网" , "跑步" }); List<Student> list = new ArrayList<Student>(); list.add(student1); list.add(student2); JSONArray jsonArray = JSONArray.fromObject(list); System.out.println(jsonArray.toString()); JSONArray new_jsonArray=JSONArray.fromObject(jsonArray.toArray()); Collection java_collection=JSONArray.toCollection(new_jsonArray); if (java_collection!= null && !java_collection.isEmpty()) { Iterator it=java_collection.iterator(); while (it.hasNext()) { JSONObject jsonObj=JSONObject.fromObject(it.next()); Student stu=(Student) JSONObject.toBean(jsonObj,Student. class ); System.out.println(stu.getName()); } } } private static void TestJsonAttribute() { /** * 创建json对象并为该对象设置属性 */ JSONObject jsonObj = new JSONObject(); jsonObj.put( "Int_att" , 25 ); //添加int型属性 jsonObj.put( "String_att" , "str" ); //添加string型属性 jsonObj.put( "Double_att" , 12.25 ); //添加double型属性 jsonObj.put( "Boolean_att" , true ); //添加boolean型属性 //添加JSONObject型属性 JSONObject jsonObjSon = new JSONObject(); jsonObjSon.put( "id" , 1 ); jsonObjSon.put( "name" , "tom" ); jsonObj.put( "JSONObject_att" ,jsonObjSon); //添加JSONArray型属性 JSONArray jsonArray = new JSONArray(); jsonArray.add( "array0" ); jsonArray.add( "array1" ); jsonArray.add( "array2" ); jsonArray.add( "array3" ); jsonObj.put( "JSONArray_att" , jsonArray); System.out.println(jsonObj.toString()); System.out.println( "Int_att:" +jsonObj.getInt( "Int_att" )); System.out.println( "String_att:" +jsonObj.getString( "String_att" )); System.out.println( "Double_att:" +jsonObj.getDouble( "Double_att" )); System.out.println( "Boolean_att:" +jsonObj.getBoolean( "Boolean_att" )); System.out.println( "JSONObject_att:" +jsonObj.getJSONObject( "JSONObject_att" )); System.out.println( "JSONArray_att:" +jsonObj.getJSONArray( "JSONArray_att" )); } /** * java对象与json对象互相转换 */ private static void TestJsonBean() { /** * 创建java对象 */ Student student = new Student(); student.setId( 1 ); student.setName( "jag" ); student.setSex( "man" ); student.setAge( 25 ); student.setHobby( new String[]{ "篮球" , "上网" , "跑步" , "游戏" }); /** * java对象转换成json对象,并获取json对象属性 */ JSONObject jsonStu = JSONObject.fromObject(student); System.out.println(jsonStu.toString()); System.out.println(jsonStu.getJSONArray( "hobby" )); /** * json对象转换成java对象,并获取java对象属性 */ Student stu = (Student) JSONObject.toBean(jsonStu, Student. class ); System.out.println(stu.getName()); /** * 创建json对象 */ JSONObject jsonObj = new JSONObject(); jsonObj.put( "id" , 1 ); jsonObj.put( "name" , "张勇" ); jsonObj.put( "sex" , "男" ); jsonObj.put( "age" , 24 ); //jsonObj.put("hobby",new String[]{"上网","游戏","跑步","音乐"}); //System.out.println(jsonObj.toString()); /** * json对象转换成java对象 */ Student stud = (Student) JSONObject.toBean(jsonObj,Student. class ); System.out.println(stud.getName()); } } |
希望本文所述对大家java程序设计有所帮助。
原文链接:http://blog.csdn.net/sjiang2142/article/details/6706097