Converting between Java objects and JSON objects

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2. Import java.util.ArrayList;
4. Import java.util.Collection;
6. Import Java.util.Iterator;
8. Import java.util.List;
12. Import Net.sf.json.JSONArray;
14. Import Net.sf.json.JSONObject;
18. Public class MainClass {
22. public static void Main (string[] args) {
24. Testjsonbean ();
26. Testjsonattribute ();
28. Testjsonarray ();
30. }
34. @SuppressWarnings ("Rawtypes")
36. private static void Testjsonarray () {
38. Student student1 = new Student ();
40. Student1.setid (1);
42. Student1.setname ("Jag");
44. Student1.setsex ("man");
46. Student1.setage (25);
48. Student1.sethobby (new string[]{"basketball","Game"});
52. Student Student2 = new Student ();
54. Student2.setid (2);
56. Student2.setname ("Tom");
58. Student2.setsex ("woman");
60. Student2.setage (23);
62. Student2.sethobby (new string[]{"surfing","Running"});
66. list<student> list = new arraylist<student> ();
68. List.add (STUDENT1);
70. List.add (Student2);
74. Jsonarray Jsonarray = jsonarray.fromobject (list);
76. System.out.println (Jsonarray.tostring ());
80. Jsonarray New_jsonarray=jsonarray.fromobject (Jsonarray.toarray ());
82. Collection java_collection=jsonarray.tocollection (New_jsonarray);
84. if (java_collection!=null &&!java_collection.isempty ())
86. {
88. Iterator It=java_collection.iterator ();
90. While (It.hasnext ())
92. {
94. Jsonobject Jsonobj=jsonobject.fromobject (It.next ());
96. Student stu= (Student) Jsonobject.tobean (jsonobj,student.   Class);
98. System.out.println (Stu.getname ());
100. }
102. }
104. }
108. private static void Testjsonattribute () {
110. /** 
112. * Create a JSON object and set properties for the object
114. */
116. Jsonobject jsonobj = new Jsonobject ();
118. Jsonobj.put ("Int_att"); Adding an int type property
120. Jsonobj.put ("String_att","str"); Add string property
122. Jsonobj.put ("Double_att",12.25); Add double Type property
124. Jsonobj.put ("Boolean_att",true); Adding a Boolean property
126. //Add Jsonobject type Properties
128. Jsonobject Jsonobjson = new Jsonobject ();
130. Jsonobjson.put ("id", 1);
132. Jsonobjson.put ("name", "Tom");
134. Jsonobj.put ("Jsonobject_att", Jsonobjson);
136. //Add Jsonarray type Properties
138. Jsonarray Jsonarray = new Jsonarray ();
140. Jsonarray.add ("array0");
142. Jsonarray.add ("array1");
144. Jsonarray.add ("array2");
146. Jsonarray.add ("array3");
148. Jsonobj.put ("Jsonarray_att", Jsonarray);
150. System.out.println (Jsonobj.tostring ());
152. System.out.println ("Int_att:" +jsonobj.getint ("Int_att"));
154. System.out.println ("String_att:" +jsonobj.getstring ("String_att"));
156. System.out.println ("Double_att:" +jsonobj.getdouble ("Double_att"));
158. System.out.println ("Boolean_att:" +jsonobj.getboolean ("Boolean_att"));
160. System.out.println ("Jsonobject_att:" +jsonobj.getjsonobject ("Jsonobject_att"));
162. System.out.println ("Jsonarray_att:" +jsonobj.getjsonarray ("Jsonarray_att"));
164. }
168. /** 
170. * Java objects and JSON objects are converted to each other
172. */
174. private static void Testjsonbean () {
176. /** 
178. * Create Java objects
180. */
182. Student Student = new Student ();
184. Student.setid (1);
186. Student.setname ("Jag");
188. Student.setsex ("man");
190. Student.setage (25);
192. Student.sethobby (new string[]{"basketball","Internet","Running", "Game"});
194. /** 
196. * Java objects are converted to JSON objects and get JSON object properties
198. */
200. Jsonobject Jsonstu = jsonobject.fromobject (student);
202. System.out.println (Jsonstu.tostring ());
204. System.out.println (Jsonstu.getjsonarray ("hobby"));
206. /** 
208. * JSON objects are converted to Java objects and get Java object properties
210. */
212. Student stu = (Student) Jsonobject.tobean (Jsonstu, Student.   Class);
214. System.out.println (Stu.getname ());
216. /** 
218. * Create JSON Object
220. */
222. Jsonobject jsonobj = new Jsonobject ();
224. Jsonobj.put ("id",1);
226. Jsonobj.put ("name","Zhang Yong");
228. Jsonobj.put ("Sex","male");
230. Jsonobj.put ("Age",24);
232. //jsonobj.put ("hobby", New string[]{"Internet", "games", "Running", "Music"});
234. //system.out.println (jsonobj.tostring ());
236. /** 
238. * JSON objects are converted to Java objects
240. */
242. Student stud = (Student) Jsonobject.tobean (jsonobj,student.   Class);
244. System.out.println (Stud.getname ());
246. }
248. }

Converting between Java objects and JSON objects