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JAVA 遍曆檔案夾下的所有檔案(遞迴調用和非遞迴調用)
1.不使用遞迴的方法調用.
public void traverseFolder1(String path) { int fileNum = 0, folderNum = 0; File file = new File(path); if (file.exists()) { LinkedList<File> list = new LinkedList<File>(); File[] files = file.listFiles(); for (File file2 : files) { if (file2.isDirectory()) { System.out.println("檔案夾:" + file2.getAbsolutePath()); list.add(file2); fileNum++; } else { System.out.println("檔案:" + file2.getAbsolutePath()); folderNum++; } } File temp_file; while (!list.isEmpty()) { temp_file = list.removeFirst(); files = temp_file.listFiles(); for (File file2 : files) { if (file2.isDirectory()) { System.out.println("檔案夾:" + file2.getAbsolutePath()); list.add(file2); fileNum++; } else { System.out.println("檔案:" + file2.getAbsolutePath()); folderNum++; } } } } else { System.out.println("檔案不存在!"); } System.out.println("檔案夾共有:" + folderNum + ",檔案共有:" + fileNum); }
2.使用遞迴的方法調用.
public void traverseFolder2(String path) { File file = new File(path); if (file.exists()) { File[] files = file.listFiles(); if (files.length == 0) { System.out.println("檔案夾是空的!"); return; } else { for (File file2 : files) { if (file2.isDirectory()) { System.out.println("檔案夾:" + file2.getAbsolutePath()); traverseFolder2(file2.getAbsolutePath()); } else { System.out.println("檔案:" + file2.getAbsolutePath()); } } } } else { System.out.println("檔案不存在!"); } }
3,
public static List<File> getFileList(String strPath) { File dir = new File(strPath); File[] files = dir.listFiles(); // 該檔案目錄下檔案全部放入數組 if (files != null) { for (int i = 0; i < files.length; i++) { String fileName = files[i].getName(); if (files[i].isDirectory()) { // 判斷是檔案還是檔案夾 getFileList(files[i].getAbsolutePath()); // 擷取檔案絕對路徑 } else if (fileName.endsWith("avi")) { // 判斷檔案名稱是否以.avi結尾 String strFileName = files[i].getAbsolutePath(); System.out.println("---" + strFileName); filelist.add(files[i]); } else { continue; } } } return filelist; }
JAVA 遍曆檔案夾下的所有檔案(遞迴調用和非遞迴調用)