java修改本地文件名称

import java.io.*;

public class TestMain3 {
 
 public static void main(String[] args) {
  
  File file = new File("D:\\yubiyezhucebiao1.xls");
  
  String name = "2";
  
  String filename = file.getAbsolutePath();
  
  filename = filename.substring(0, filename.lastIndexOf("."));
 
  file.renameTo(new File(filename + name + ".xls"));
 }

}