Java基础 - 遍历目录下所有文件

1.非递归方式

public static void folderMethod1(String path) {
    int fileNum = 0, folderNum = 0;
    File file = new File(path);
    LinkedList<File> list = new LinkedList<>();

    if (file.exists()) {
        if (null == file.listFiles()) {
            return;
        }
        list.addAll(Arrays.asList(file.listFiles()));
        while (!list.isEmpty()) {
            File[] files = list.removeFirst().listFiles();
            if (null == files) {
                continue;
            }
            for (File f : files) {
                if (f.isDirectory()) {
                    System.out.println("文件夹:" + f.getAbsolutePath());
                    list.add(f);
                    folderNum++;
                } else {
                    System.out.println("文件:" + f.getAbsolutePath());
                    fileNum++;
                }
            }
        }
    } else {
        System.out.println("文件不存在!");
    }
    System.out.println("文件夹数量:" + folderNum + ",文件数量:" + fileNum);
}

2.递归方式

public static void folderMethod2(String path) {
    File file = new File(path);
    if (file.exists()) {
        File[] files = file.listFiles();
        if (null != files) {
            for (File file2 : files) {
                if (file2.isDirectory()) {
                    System.out.println("文件夹:" + file2.getAbsolutePath());
                    folderMethod2(file2.getAbsolutePath());
                } else {
                    System.out.println("文件:" + file2.getAbsolutePath());
                }
            }
        }
    } else {
        System.out.println("文件不存在!");
    }
}