【Java nio】 Blocking nio

package com.slp.nio;


import org.junit.Test;

import java.io.File;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
import java.nio.channels.ServerSocketChannel;
import java.nio.channels.SocketChannel;
import java.nio.file.Paths;
import java.nio.file.StandardOpenOption;

/**
 * Created by sanglp on 2017/3/1.
 * 一、使用NIO完成网络通信的三个核心
 * 1、通道：负责连接
 *     |--java.nio.channels.channel接口
 *        |--SelectableChannel
 *           |--SocketChannel
 *           |--ServerSocketChannel
 *           |--DatagramChannel
 *
 *           |--Pipe.SinkChannel
 *           |--Pipe.SourceChannel
 * 2、缓冲区：负责数据的存取
 * 3、选择器：是SelectableChannel的多路复用器，用于监控SelectableChannel的IO状况
 *
 */
public class TestBlockingNIO {
    //客户端
    @org.junit.Test
    public void client() throws IOException {
      // 1、获取通道
       SocketChannel socketChannel = SocketChannel.open(new InetSocketAddress("127.0.0.1",9898));
        FileChannel inChannel = FileChannel.open(Paths.get("2.jpg"), StandardOpenOption.READ);
        //2、分配指定大小的缓冲区
        ByteBuffer buffer =ByteBuffer.allocate(1024);
        //3、读取本地文件 并发送到服务端
        while (inChannel.read(buffer)!=-1){
            buffer.flip();
            socketChannel.write(buffer);
            buffer.clear();
        }
        //4、关闭通道
        socketChannel.close();
        inChannel.close();
    }
    //服务端
    @Test
    public void server() throws IOException {
        //1、获取通道
        ServerSocketChannel serverSocketChannel = ServerSocketChannel.open();
        FileChannel outChannel = FileChannel.open(Paths.get("3.jpg"),StandardOpenOption.WRITE,StandardOpenOption.CREATE);
        //2、绑定连接
        serverSocketChannel.bind(new InetSocketAddress(9898));
        //3、获取客户端连接
        SocketChannel socketChannel = serverSocketChannel.accept();
        //4、分配指定大小的缓冲区
        ByteBuffer buffer = ByteBuffer.allocate(1024);

        //5、接收客户端的数据，并保存到本地

        while (socketChannel.read(buffer)!=-1){
            buffer.flip();
            outChannel.write(buffer);
            buffer.clear();
        }
        //关闭通道
        socketChannel.close();
        serverSocketChannel.close();

    }
}