RenamFile

import java.io.File;

public class RenamFile {
 //add by yums in 2010-01-21
 public void renameFile(String path,String oldname,String newname){ 
     if(!oldname.equals(newname)){//新的文件名和以前文件名不同时,才有必要进行重命名 
         File oldfile=new File(path+oldname); 
         File newfile=new File(path+newname); 
         if(newfile.exists())//若在该目录下已经有一个文件和新文件名相同，则不允许重命名 
             System.out.println(newname+"已经存在！"); 
         else{ 
             oldfile.renameTo(newfile); 
         }  
     }          
 }  
 
 public static void main(String[] args){
  System.out.println("11111");
  RenamFile a = new RenamFile();
  String path = "c://";
  String a1= "test1.txt";
  String a2 = "test2.txt";
  a.renameFile(path,a1, a2);
  System.out.println("ok");
 }
}