java 复制文件

// 复制文件  
        int byteread = 0; // 读取的字节数
         in = new FileInputStream(savePath);  
         out = new FileOutputStream(copypath);
         byte[] buffer = new byte[1024];
         while ((byteread = in.read(buffer)) != -1) {  
             out.write(buffer, 0, byteread);  
         }*/