[Java] 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