Java复制文件方法

/** 
     * 复制单个文件 
     * @param oldPath String 原文件路径 如：c:/fqf.txt 
     * @param newPath String 复制后路径 如：f:/fqf.txt 
     * @return boolean 
     */ 
   public void copyFile(String oldPath, String newPath) { 
       try { 
           int bytesum = 0; 
           int byteread = 0; 
           File oldfile = new File(oldPath); 
           if (oldfile.exists()) { //文件存在时 
               InputStream inStream = new FileInputStream(oldPath); //读入原文件 
               FileOutputStream fs = new FileOutputStream(newPath); 
               byte[] buffer = new byte[1444]; 
               int length; 
               while ( (byteread = inStream.read(buffer)) != -1) { 
                   bytesum += byteread; //字节数 文件大小 
                   System.out.println(bytesum); 
                   fs.write(buffer, 0, byteread); 
               } 
               inStream.close(); 
           } 
       } 
       catch (Exception e) { 
           System.out.println("复制单个文件操作出错"); 
           e.printStackTrace(); 

       } 

   }