package com.nio;
import org.junit.Test;
import java.io.BufferedReader;
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.Path;
import java.nio.file.Paths;
import java.nio.file.StandardOpenOption;
/**
* 网络通信小案例
*/
public class TestBlockingNIO2 {
public void client() throws Exception{
SocketChannel sChannel = SocketChannel.open(new InetSocketAddress("127.0.0.1", 9898));
FileChannel inChannel = FileChannel.open(Paths.get("1.jpg"), StandardOpenOption.READ);
ByteBuffer buf = ByteBuffer.allocate(1024);
while (inChannel.read(buf) != -1) {
buf.flip();//切换成读模式
sChannel.write(buf);
buf.clear();
}
sChannel.shutdownOutput();
//接收服务端的反馈
int len=0;
while ((len=sChannel.read(buf))!=-1){
buf.flip();
System.out.println(new String(buf.array(),0,len));
buf.clear();
}
//关闭通道
inChannel.close();
sChannel.close();
}
@Test
public void serve() throws Exception{
ServerSocketChannel ssChannel = ServerSocketChannel.open();
FileChannel outChannel = FileChannel.open(Paths.get("2.jpg"), StandardOpenOption.WRITE, StandardOpenOption.CREATE);
ssChannel.bind(new InetSocketAddress(9898));
SocketChannel sChannel = ssChannel.accept();
ByteBuffer buf = ByteBuffer.allocate(1024);
while (sChannel.read(buf)!=-1){
buf.flip();
outChannel.write(buf);
buf.clear();
}
//发送反馈给客户端
buf.put("服务端接收数据成功".getBytes());
buf.flip();
sChannel.write(buf);
//关闭通道
sChannel.close();
outChannel.close();
ssChannel.close();
}
}
运行之后，会在客户端的控制台打印输出：服务端接收数据成功