Directory Operations Tool Class Copydir.java

Source: Internet
Author: User

  1. Package com.util;
  2. Import java.io.*;
  3. /**
  4. * 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.
  5. * @datetime DSC 24
  6. */
  7. Public class Copydir {
  8. private File SDir, Ddir, Newdir;
  9. Public copydir (string s, String d) {
  10. This (new file (s), new file (d));
  11. }
  12. Copydir (file SDir, file Ddir)//C:\\test D:\\ABC
  13. {
  14. this.sdir = SDir;
  15. this.ddir = Ddir;
  16. }
  17. public void Copydir () throws IOException {
  18. //is to create the destination directory. That is, create a source folder to copy. Test
  19. //Gets the source folder name.
  20. String name = Sdir.getname ();
  21. //Create the folder in the destination directory by this name in order to store files or folders in the source folder.
  22. //The destination directory and the source folder name are encapsulated into a file object.
  23. Newdir = Ddir;
  24. //New File (Ddir,name);
  25. //Call the object's MkDir method. Create the folder in the destination directory. D:\\abc\\test
  26. Newdir.mkdir (); //  
  27. //Traverse the source folder.
  28. Listall (SDir);
  29. }
  30. /* 
  31. * Encapsulates the traversal directory into a method. During the traversal, the file creation file is encountered. The directory creation directory was encountered.
  32. */
  33. private void Listall (File dir) throws IOException {
  34. file[] files = dir.listfiles ();
  35. For (int x = 0; x < files.length; × x + +) {
  36. if (files[x].isdirectory ()) {
  37. Createdir (Files[x]);  //Call the method that created the directory.
  38. Listall (Files[x]); //continues to be recursive.  Enter the child directory.
  39. } Else {
  40. CreateFile (Files[x]);  //Call the method that created the file.
  41. }
  42. }
  43. }
  44. /* 
  45. * Copy directory. Create a new directory in the destination directory from the source directory.
  46. */
  47. private void Createdir (File dir) {
  48. File d = replacefile (dir);
  49. D.mkdir ();
  50. }
  51. /* 
  52. * Copy file.
  53. */
  54. private void createFile (file file) throws IOException {
  55. File NewFile = replacefile (file);
  56. the//copy file is a data transfer process.  Need to be done by flow.
  57. FileInputStream FIS = new FileInputStream (file);
  58. FileOutputStream fos = new FileOutputStream (NewFile);
  59. byte[] buf = new byte[1024x768 * 2];
  60. int num = 0;
  61. While (num = Fis.read (BUF))! =-1) {
  62. Fos.write (buf, 0, num);
  63. }
  64. Fos.close ();
  65. Fis.close ();
  66. }
  67. /* 
  68. * Replace path.
  69. */
  70. Private file Replacefile (file f) {
  71. //The principle is: Replace the parent directory (C:\\tset) of the source directory with the destination parent directory. (d:\\abc\\test)
  72. String path = F.getabsolutepath ();  //Gets the decision path of the source file or folder.
  73. //Replace the absolute path of the source file or folder with the destination path.
  74. String NewPath = Path.replace (Sdir.getabsolutepath (), Newdir
  75. . GetAbsolutePath ());
  76. //Encapsulates a new destination path into a file object
  77. File NewFile = new File (NewPath);
  78. return newFile;
  79. }
  80. }

Directory Operations Tool Class Copydir.java

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