Directory Operations Tool Class Copydir.java

2. Package com.util;
6. Import java.io.*;
10. /**
12. * 1, set up the destination directory. 2. Traverse the source directory. 3. During the traversal process, create a file or folder. Principle: Actually change the source file or directory header.
14. * @datetime DSC 24
16. */
18. Public class Copydir {
20. private File SDir, Ddir, Newdir;
24. Public copydir (string s, String d) {
26. This (new file (s), new file (d));
28. }
32. Copydir (file SDir, file Ddir)//C:\\test D:\\ABC
34. {
36. this.sdir = SDir;
38. this.ddir = Ddir;
40. }
44. public void Copydir () throws IOException {
46. //is to create the destination directory. That is, create a source folder to copy. Test
48. //Gets the source folder name.
50. String name = Sdir.getname ();
52. //Create the folder in the destination directory by this name in order to store files or folders in the source folder.
54. //The destination directory and the source folder name are encapsulated into a file object.
56. Newdir = Ddir;
58. //New File (Ddir,name);
60. //Call the object's MkDir method. Create the folder in the destination directory. D:\\abc\\test
62. Newdir.mkdir (); //  
66. //Traverse the source folder.
68. Listall (SDir);
70. }
74. /* 
76. * Encapsulates the traversal directory into a method. During the traversal, the file creation file is encountered. The directory creation directory was encountered.
78. */
80. private void Listall (File dir) throws IOException {
82. file[] files = dir.listfiles ();
84. For (int x = 0; x < files.length; × x + +) {
86. if (files[x].isdirectory ()) {
88. Createdir (Files[x]);  //Call the method that created the directory.
90. Listall (Files[x]); //continues to be recursive.  Enter the child directory.
92. } Else {
94. CreateFile (Files[x]);  //Call the method that created the file.
96. }
98. }
100. }
104. /* 
106. * Copy directory. Create a new directory in the destination directory from the source directory.
108. */
110. private void Createdir (File dir) {
112. File d = replacefile (dir);
114. D.mkdir ();
116. }
120. /* 
122. * Copy file.
124. */
126. private void createFile (file file) throws IOException {
128. File NewFile = replacefile (file);
130. the//copy file is a data transfer process.  Need to be done by flow.
132. FileInputStream FIS = new FileInputStream (file);
134. FileOutputStream fos = new FileOutputStream (NewFile);
136. byte[] buf = new byte[1024x768 * 2];
138. int num = 0;
140. While (num = Fis.read (BUF))! =-1) {
142. Fos.write (buf, 0, num);
144. }
146. Fos.close ();
148. Fis.close ();
150. }
154. /* 
156. * Replace path.
158. */
160. Private file Replacefile (file f) {
162. //The principle is: Replace the parent directory (C:\\tset) of the source directory with the destination parent directory. (d:\\abc\\test)
164. String path = F.getabsolutepath ();  //Gets the decision path of the source file or folder.
166. //Replace the absolute path of the source file or folder with the destination path.
168. String NewPath = Path.replace (Sdir.getabsolutepath (), Newdir
170. . GetAbsolutePath ());
172. //Encapsulates a new destination path into a file object
174. File NewFile = new File (NewPath);
176. return newFile;
178. }
180. }

Directory Operations Tool Class Copydir.java