1. import java.io.File;
  2. import java.util.ArrayList;
  3. import java.util.List;
  5. public class DirectorySplitter {
  7. /**
  8. * Splits the files in a directory into smaller directories.
  9. *
  10. * @param sourceDir The directory to split.
  11. * @param numSubDirs The number of subdirectories to create.
  12. */
  13. public static void splitDirectory(File sourceDir, int numSubDirs) {
  14. if (!sourceDir.exists() || !sourceDir.isDirectory()) {
  15. System.err.println("Invalid source directory: " + sourceDir.getAbsolutePath());
  16. return;
  17. }
  19. File[] files = sourceDir.listFiles();
  20. if (files == null) {
  21. System.err.println("Could not list files in: " + sourceDir.getAbsolutePath());
  22. return;
  23. }
  25. if (files.length == 0) {
  26. System.out.println("Directory is empty.");
  27. return;
  28. }
  32. List<File> fileList = new ArrayList<>();
  33. for (File file : files) {
  34. if (file.isFile()) {
  35. fileList.add(file);
  36. }
  37. }
  39. if (fileList.isEmpty()) {
  40. System.out.println("No files found in the directory.");
  41. return;
  42. }
  45. int filesPerSubDir = (int) Math.ceil((double) fileList.size() / numSubDirs); // Calculate files per sub directory
  47. int subDirCount = 0;
  48. for (File file : fileList) {
  49. File subDir = new File(sourceDir, "subdir_" + subDirCount); // Create subdirectories
  50. subDir.mkdir();
  52. subDirCount++;
  54. if (subDirCount % filesPerSubDir == 0) {
  55. subDirCount = 0;
  56. }
  58. File destinationFile = new File(subDir, file.getName());
  59. file.copyTo(destinationFile); // Copy file to the sub directory
  60. }
  62. System.out.println("Directory split successfully.");
  63. }
  65. public static void main(String[] args) {
  66. // Example Usage:
  67. File sourceDirectory = new File("sandbox_data"); // Replace with your directory
  68. int numberOfSubDirectories = 3;
  70. // Create the source directory if it doesn't exist.
  71. if (!sourceDirectory.exists()) {
  72. sourceDirectory.mkdir();
  73. // Create some dummy files
  74. for(int i = 0; i < 10; i++) {
  75. File dummyFile = new File(sourceDirectory, "test_file_" + i + ".txt");
  76. dummyFile.createNewFile();
  77. }
  78. }
  82. splitDirectory(sourceDirectory, numberOfSubDirectories);
  83. }
  84. }

Add your comment