NIO分散读取与聚集写入

分散(Scatter)和聚集(Gather)
分散读取（Scattering Reads）: 将通道中的数据分散到多个缓冲区中
聚集写入（Gathering Writes）: 将多个缓冲区中的数据聚集到通道中

    @Test  // 分散(Scatter)和聚集(Gather)
    public void test7() throws IOException{
        RandomAccessFile raf1=new RandomAccessFile("1.txt","rw");
        //1、获取通道
        FileChannel channel1=raf1.getChannel();
        //2、分配指定大小的缓冲区
        ByteBuffer buf1=ByteBuffer.allocate(100);
        ByteBuffer buf2=ByteBuffer.allocate(200);
        //3、分散读取
        ByteBuffer[] bufs={buf1,buf2};
        channel1.read(bufs);
        for(ByteBuffer byteBuffer:bufs){
            byteBuffer.flip();
        }
        System.out.println(new String(bufs[0].array(),0,bufs[0].limit()));
        System.out.println("------------------");
        System.out.println(new String(bufs[1].array(),0,bufs[1].limit()));
    }