1  public static void main(String[] args) throws IOException {
 2         //创建RandomAccessFile源文件
 3         RandomAccessFile rabsrc = new RandomAccessFile("mm.png","rw");
 4         //获取源文件的Channel
 5         FileChannel srcChannel = rabsrc.getChannel();
 6         //目标文件
 7         RandomAccessFile radTarget = new RandomAccessFile("D:\\download\\java\\mm.png","rw");
 8         //生成目标文件的Channel通道
 9         FileChannel fc = radTarget.getChannel();
10         //调用transferTo
11         assert false;
12         long transferTo = srcChannel.transferTo(0,srcChannel.size(),fc);
13         if(transferTo >0){
14             System.out.println("复制成功");
15         }
16         rabsrc.close();
17         srcChannel.close();
18         radTarget.close();
19         fc.close();
20     }