学步园

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<File> list = new LinkedList<File>();
			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!");
		}
	}