JAVA 遍历文件夹下的所有文件(递归调用和非递归调用)

JAVA 遍历文件夹下的所有文件(递归调用和非递归调用)

1.不使用递归的方法调用.

public void traverseFolder1(String path) {
		int fileNum = 0, folderNum = 0;
		File file = new File(path);
		if (file.exists()) {
			LinkedList list = new LinkedList();
			File[] files = file.listFiles();
			for (File file2 : files) {
				if (file2.isDirectory()) {
					System.out.println("文件夹:" + file2.getAbsolutePath());
					list.add(file2);
					fileNum++;
				} else {
					System.out.println("文件:" + 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("文件夹:" + file2.getAbsolutePath());
						list.add(file2);
						fileNum++;
					} else {
						System.out.println("文件:" + file2.getAbsolutePath());
						folderNum++;
					}
				}
			}
		} else {
			System.out.println("文件不存在!");
		}
		System.out.println("文件夹共有:" + folderNum + ",文件共有:" + fileNum);

	}

2.使用递归的方法调用.

public void traverseFolder2(String path) {

		File file = new File(path);
		if (file.exists()) {
			File[] files = file.listFiles();
			if (files.length == 0) {
				System.out.println("文件夹是空的!");
				return;
			} else {
				for (File file2 : files) {
					if (file2.isDirectory()) {
						System.out.println("文件夹:" + file2.getAbsolutePath());
						traverseFolder2(file2.getAbsolutePath());
					} else {
						System.out.println("文件:" + file2.getAbsolutePath());
					}
				}
			}
		} else {
			System.out.println("文件不存在!");
		}
	}

3,

public static List getFileList(String strPath) {
		File dir = new File(strPath);
		File[] files = dir.listFiles(); // 该文件目录下文件全部放入数组
		if (files != null) {
			for (int i = 0; i < files.length; i++) {
				String fileName = files[i].getName();
				if (files[i].isDirectory()) { // 判断是文件还是文件夹
					getFileList(files[i].getAbsolutePath()); // 获取文件绝对路径
				} else if (fileName.endsWith("avi")) { // 判断文件名是否以.avi结尾
					String strFileName = files[i].getAbsolutePath();
					System.out.println("---" + strFileName);
					filelist.add(files[i]);
				} else {
					continue;
				}
			}

		}
		return filelist;
	}