NIO（五）

分散读取，聚集写入

package com.cppdy.nio;

import java.io.RandomAccessFile;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;

//分散读取，聚集写入
public class NIOBufferDemo5 {

    public static void main(String[] args) throws Exception {

        RandomAccessFile raf = new RandomAccessFile("F:\\cppdy\\1.txt", "rw");
        FileChannel channel = raf.getChannel();

        ByteBuffer buf1 = ByteBuffer.allocate(100);
        ByteBuffer buf2 = ByteBuffer.allocate(1024);

        ByteBuffer[] bufs = { buf1, buf2 };

        channel.read(bufs);

        for (int i = 0; i < bufs.length; i++) {
            ByteBuffer byteBuffer = bufs[i];
            byteBuffer.flip();
        }

        System.out.println("buf1：" + new String(bufs[0].array(), 0, bufs[0].limit()));
        System.out.println("-----------------------------------------------------");
        System.out.println("buf2：" + new String(bufs[1].array(), 0, bufs[1].limit()));

        RandomAccessFile raf2 = new RandomAccessFile("F:\\cppdy\\2.txt", "rw");
        FileChannel channel2 = raf2.getChannel();
        channel2.write(bufs);

        channel.close();
        channel2.close();
    }

}