file类递归，文件按层级打印

package com.epoint.file;

import java.io.File;
import java.util.Scanner;

public class printFile {
public static void main(String[] args) {
print(Test1.getDir(),0);
}
//获取输入路径
public static File getDir(){
Scanner sc = new Scanner(System.in);
while(true){
System.out.println("请输入一个文件夹路径： ");
String dire = sc.nextLine();
File file = new File(dire);
if(!file.exists()){
System.out.println("输入的路径不存在！");
}else if(file.isFile()){
System.out.println("请输入文件夹路径！");
}else{
return file;
}
}
}
//层级打印
public static void print(File file,int lev){
File[] files = file.listFiles();
for (File subfile : files) {
for (int i = 0; i <= lev; i++) {
System.out.print("\t");
}
System.out.println(subfile.getName());
if(subfile.isDirectory()){
print(subfile,lev++);
}
}
}
}