JavaSE练习--IO_File文件序号标号器

请输入要标号文件夹路径：C:\Users\FrancisGaozhu\TempFile\test\1_b.mp4
路径指向非文件夹！

请输入要标号文件夹路径：C:\Users\FrancisGaozhu\TempFile\test1
文件夹不存在！

请输入要标号文件夹路径：C:\Users\FrancisGaozhu\TempFile\test1
操作完成！

package com.heqing.main;

import com.heqing.model.FileCompareBy;

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

public class Main {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        //region 提示用户输入对应的路径
        System.out.print("请输入要标号文件夹路径：");
        String inputLine = input.nextLine();
        //endregion
        File file = new File(inputLine);
        //region 基本信息校验
        if (!file.exists()){
            System.out.println("文件夹不存在！");
            return;
        }
        if (!file.isDirectory()){
            System.out.println("路径指向非文件夹！");
            return;
        }
        //endregion
        File[] files = file.listFiles();
        FileCompareBy fileCompareBy = new FileCompareBy();
        Arrays.sort(files,fileCompareBy);
        int successCount = 0;
        for (int i = 0; i < files.length; i++) {
            File current = files[i];
            String currentName = current.getName();
            StringBuilder sbCurrentName = new StringBuilder();
            if (currentName.contains("_")){
                currentName = currentName.split("_")[1];
            }
            sbCurrentName.append(i+1).append("_").append(currentName);
            File newCurrent = new File(current.getParent(),sbCurrentName.toString());
            if (current.renameTo(newCurrent)) {
                successCount++;
            }
        }
        if (successCount == files.length){
            System.out.println("操作完成！");
        }else {
            System.out.println("操作未完成！");
        }
    }
}

package com.heqing.model;

import java.io.File;
import java.util.Comparator;

public class FileCompareBy implements Comparator {
    @Override
    public int compare(Object o1, Object o2) {
        if (!(o1 instanceof File) || !(o2 instanceof File)){
            throw new NotFileException("输入类型非文件类型");
        }
        File file1 = (File)o1,file2 = (File)o2;
        return file1.lastModified() < file2.lastModified() ? -1 : file1.lastModified() > file2.lastModified() ?1 : 0;
    }
}

package com.heqing.model;

public class NotFileException extends RuntimeException{
    public NotFileException(String message) {
        super(message);
    }
}