使用IO,递归打印目录树

package chengbaoDemo;

import java.io.File;
import java.io.IOException;

public class TestIOFile {
    public static void main(String[] args) {
        File f = new File("D:/Project/java/Test");
        printTreeFile(f, 0);
    }
    public static void printTreeFile(File file, int level) {
        for (int i = 0; i < level; i++) {
            System.out.print("\t");
        }
        String fileName = file.getName();
        System.out.println(fileName);

        if (file.isDirectory()) {
             File[] files = file.listFiles();
             for (File f: files) {
                 printTreeFile(f, level + 1);
             }
        }
    }

}