Java的File类之打印文件以及文件夹，递归调用

import java.io.*;

public class FileDemo {

    public static void main(String[] args) {
        String path = "D:\\ideaSpace\\LearnJava01";
        File file = new File(path);
        fileTest(file, 0);
    }

    public static void fileTest(File src, int deep) {
        for(int i=0;i<deep;i++){
            System.out.print("-");
        }
        System.out.println(src.getName());
        if (src == null || !src.exists()) {
            return;
        } else if (src.isDirectory()) {
            for (File f : src.listFiles()) {
                fileTest(f, deep++);
            }
        }
    }
}