-
效果图
-
依赖
<dependency>
<groupId>io.netty</groupId>
<artifactId>netty-all</artifactId>
<version>4.1.36.Final</version>
</dependency>
- 客户端代码
import io.netty.bootstrap.Bootstrap;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.*;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.util.CharsetUtil;
import java.nio.charset.Charset;
import java.util.Date;
import java.util.Scanner;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
public class client {
public static void main(String[] args) {
final ExecutorService pool = Executors.newSingleThreadExecutor();
EventLoopGroup group = new NioEventLoopGroup();
try {
Bootstrap bootstrap = new Bootstrap();
bootstrap.group(group).channel(NioSocketChannel.class)
.handler(new ChannelInitializer<SocketChannel>(){
@Override
protected void initChannel(SocketChannel socketChannel) throws Exception {
ChannelPipeline pipeline=socketChannel.pipeline();
pipeline.addLast(new SimpleChannelInboundHandler<ByteBuf>() {
@Override
public void channelActive(final ChannelHandlerContext ctx) throws Exception {
System.out.println("服务器已上线！！！");
pool.execute(new Runnable() {
public void run() {
Scanner scanner=new Scanner(System.in);
String text="";
while (true){
text=scanner.nextLine();
if(text.toLowerCase().equals("bye")){
ctx.close();
}
ctx.writeAndFlush(Unpooled.copiedBuffer(text+ "\r\n ", Charset.forName("utf-8")));
System.out.println(new Date().toString()+" 【客户端】："+text);
}
}
});
}
@Override
protected void channelRead0(ChannelHandlerContext channelHandlerContext, ByteBuf byteBuf) throws Exception {
String str=byteBuf.toString(CharsetUtil.UTF_8);
System.out.println(new Date().toString()+"【服务器】："+str);
}
@Override
public void channelInactive(ChannelHandlerContext ctx) throws Exception {
super.channelInactive(ctx);
System.out.println("连接断开！！！");
System.exit(0);
}
@Override
public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
}
});
}
}); //自定义一个初始化类
ChannelFuture channelFuture = bootstrap.connect("localhost", 7000).sync();
System.out.println("客户端已启动");
channelFuture.channel().closeFuture().sync();
} catch (InterruptedException e) {
e.printStackTrace();
} finally {
group.shutdownGracefully();
}
}
}
- 服务器端代码
import io.netty.bootstrap.ServerBootstrap;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.util.CharsetUtil;
import java.nio.charset.Charset;
import java.util.Date;
import java.util.Scanner;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
public class server {
public static void main(String[] args) {
final ExecutorService pool = Executors.newSingleThreadExecutor();
EventLoopGroup bossGroup = new NioEventLoopGroup(1);
EventLoopGroup workerGroup = new NioEventLoopGroup(3);
try {
ServerBootstrap serverBootstrap = new ServerBootstrap();
serverBootstrap.group(bossGroup,workerGroup).channel(NioServerSocketChannel.class).childHandler(new SimpleChannelInboundHandler<ByteBuf>() {
@Override
public void channelActive(final ChannelHandlerContext ctx) throws Exception {
System.out.println("客户端已上线！！！");
pool.execute(new Runnable() {
public void run() {
Scanner scanner=new Scanner(System.in);
String text="";
while (true){
text=scanner.nextLine();
if(text.toLowerCase().equals("bye")){
ctx.close();
}
ctx.writeAndFlush(Unpooled.copiedBuffer(text+ "\r\n ", Charset.forName("utf-8")));
System.out.println(new Date().toString()+" 【服务器】："+text);
}
}
});
}
@Override
protected void channelRead0(ChannelHandlerContext ctx, ByteBuf byteBuf) throws Exception {
String str=byteBuf.toString(CharsetUtil.UTF_8);
System.out.println(new Date().toString()+"【客户端】："+str);
}
@Override
public void channelInactive(ChannelHandlerContext ctx) throws Exception {
super.channelInactive(ctx);
System.out.println("连接断开！！！");
System.exit(0);
}
@Override
public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
}
}); //自定义一个初始化类
ChannelFuture channelFuture = serverBootstrap.bind(7000).sync();
System.out.println("服务器已启动");
channelFuture.channel().closeFuture().sync();
} catch (InterruptedException e) {
e.printStackTrace();
} finally {
bossGroup.shutdownGracefully();
workerGroup.shutdownGracefully();
}
}
}