java批量修改文件后缀名方法总结

import java.io.File;

import java.util.Scanner;

 

public class FileEdit {

 

 public static void renameFiles(String path, String oldExt, String newExt) {

  File file = new File(path);

  if (!file.exists()) {

   System.err.println("文件路径不存在！");

   return;

  }

  File[] files = file.listFiles();

  if (files.length <= 0) {

   System.err.println("当前路径文件不存在！");

   return;

  }

  for (File f : files) {

   if (f.isDirectory()) {

    renameFiles(f.getPath(), oldExt, newExt);

   } else {

    String name = f.getName();

    if (name.endsWith("." + oldExt)) {

     name = name.substring(0, name.lastIndexOf(".") + 1);

     name += newExt;

     f.renameTo(new File(f.getParent() + "\\" + name));

    }

   }

  }

 }

 

 public static void main(String[] args) {

  Scanner sc = new Scanner(System.in);

  System.out.println("请输入要修改文件后缀名的文件夹:");

  String path = sc.nextLine();

  System.out.println("请输入修改前的后缀名:");

  String oldExt = sc.nextLine();

  System.out.println("请输入修改后的后缀名:");

  String newExt = sc.nextLine();

 

  renameFiles(path, oldExt, newExt);

  System.out.println("操作完成");

 }

}

ren *.jpg *.txt