NIO_通道之间传输数据

通道之间传输数据

　　transferFrom（）

　　transferTo（）

@Test
    public void test3() throws IOException {
        FileChannel inChannel = FileChannel.open(Paths.get("1.png"), StandardOpenOption.READ);
        FileChannel outChannel = FileChannel.open(Paths.get("4.png"),StandardOpenOption.READ,StandardOpenOption.WRITE,StandardOpenOption.CREATE);

        inChannel.transferTo(0, inChannel.size(), outChannel);

        outChannel.close();
        inChannel.close();
    }