How to read and write JSON files

The code is as follows:
Java code

2. Import Java.io.BufferedReader;
4. Import Java.io.File;
6. Import Java.io.FileReader;
8. Import Java.io.FileWriter;
10. Import java.io.IOException;
12. Import Java.io.PrintWriter;
14. Import org.json.JSONException;
16. Import Org.json.JSONObject;
20. Public class Readandwritejson {
24. /** 
26. * @param args
28. * @throws jsonexception
30. * @throws IOException
32. */
34. public static void Main (string[] args) throws Jsonexception, IOException {
36. //TODO auto-generated method stub
40. //String s = ReadFile ("./src/test.json");
42. //System.out.println (s);
46. Jsonobject jsonobject = new Jsonobject ();
48. Jsonobject.put ("1", "one");
50. Jsonobject.put ("2", "two");
52. Jsonobject.put ("3", "three");
54. Jsonobject.put ("4", "four");
56. Jsonobject.put ("5", "five");
58. Jsonobject.put ("6", "VI");
60. Jsonobject.put ("7", "⑦");
62. System.out.println (Jsonobject);
66. WriteFile ("./src/test.json", jsonobject.tostring ());
68. }
72. public static void WriteFile (String filePath, String sets)
74. throws IOException {
76. FileWriter FW = New FileWriter (FilePath);
78. PrintWriter out = new PrintWriter (FW);
80. Out.write (sets);
82. Out.println ();
84. Fw.close ();
86. Out.close ();
88. }
92. public static string ReadFile (string path) {
94. File File = new file (path);
96. BufferedReader reader = null;
98. String laststr = "";
100. try {
102. reader = new BufferedReader (new FileReader (file));
104. String tempstring = null;
106. While ((tempstring = Reader.readline ()) = null) {
108. Laststr = Laststr + tempstring;
110. }
112. Reader.close ();
114. } catch (IOException e) {
116. E.printstacktrace ();
118. } finally {
120. if (reader! = null) {
122. try {
124. Reader.close ();
126. } catch (IOException E1) {
128. }
130. }
132. }
134. return laststr;
136. }
138. }

How to read and write JSON files