netty 学习笔记（一）客户端与服务端
1、添加pom依赖
<dependency>
<groupId>io.netty</groupId>
<artifactId>netty</artifactId>
<version>3.3.0.Final</version>
</dependency>
2、服务端创建
package com.willow;
import org.jboss.netty.bootstrap.ServerBootstrap;
import org.jboss.netty.channel.*;
import org.jboss.netty.channel.socket.nio.NioServerSocketChannelFactory;
import org.jboss.netty.handler.codec.string.StringDecoder;
import org.jboss.netty.handler.codec.string.StringEncoder;
import java.net.InetSocketAddress;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
/**
* @author Administrator
* @create 2018-07-27 14:32
*/
public class NettyServer {
public static void main(String arg[]){
//1、创建服务器对象
ServerBootstrap serverBootstrap=new ServerBootstrap();
//2、创建两个线程池 ，第一个监听端口，nio监听
ExecutorService boos = Executors.newCachedThreadPool();
ExecutorService wook = Executors.newCachedThreadPool();
//3、把两个线程池加入中
serverBootstrap.setFactory(new NioServerSocketChannelFactory(boos,wook));
//4、设置管道工厂
serverBootstrap.setPipelineFactory(new ChannelPipelineFactory() {
//设置管道
@Override
public ChannelPipeline getPipeline() throws Exception {
ChannelPipeline channelPipeline=Channels.pipeline();
channelPipeline.addLast("decoder",new StringDecoder());
channelPipeline.addLast("encoder",new StringEncoder());
channelPipeline.addLast("serverHandler",new ServerHanlder());
//设置事件监听类
return channelPipeline;
}
});
serverBootstrap.bind(new InetSocketAddress(8080));
System.out.println("netty 服务器端启动完毕。。。。。。。。。。");
//访问http://localhost:8080/ 查看控制台打印效果
}
}
class ServerHanlder extends SimpleChannelHandler{
/**
* 通道关闭的时候触发
*/
@Override
public void channelClosed(ChannelHandlerContext ctx, ChannelStateEvent e) throws Exception {
super.channelClosed(ctx, e);
System.out.println("threadName:"+Thread.currentThread().getName()+"channelClosed................");
}
/**
* 必须是连接已经建立,关闭通道的时候才会触发.
*/
@Override
public void channelDisconnected(ChannelHandlerContext ctx, ChannelStateEvent e) throws Exception {
super.channelDisconnected(ctx, e);
System.out.println("threadName:"+Thread.currentThread().getName()+"channelDisconnected................");
}
/**
* 捕获异常
*/
@Override
public void exceptionCaught(ChannelHandlerContext ctx, ExceptionEvent e) throws Exception {
super.exceptionCaught(ctx, e);
System.out.println("threadName:"+Thread.currentThread().getName()+"exceptionCaught................");
}
/**
* 接受消息
*/
@Override
public void messageReceived(ChannelHandlerContext ctx, MessageEvent e) throws Exception {
super.messageReceived(ctx, e);
System.out.println("messageReceived................");
System.out.println("threadName:"+Thread.currentThread().getName()+" 服务器接受的消息是: \n"+e.getMessage());
}
}
3、客户端创建
package com.willow;
import org.jboss.netty.bootstrap.ClientBootstrap;
import org.jboss.netty.channel.*;
import org.jboss.netty.channel.socket.nio.NioClientSocketChannelFactory;
import org.jboss.netty.handler.codec.string.StringDecoder;
import org.jboss.netty.handler.codec.string.StringEncoder;
import java.net.InetSocketAddress;
import java.util.Scanner;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
/**
* @author Administrator
* @create 2018-07-27 17:30
*/
public class NettyClient {
public static void main(String arg[]){
//1、创建服务器对象
ClientBootstrap clientBootstrap=new ClientBootstrap();
//2、创建两个线程池 ，第一个监听端口，nio监听
ExecutorService boos = Executors.newCachedThreadPool();
ExecutorService wook = Executors.newCachedThreadPool();
//3、把两个线程池加入中,创建NioClientSocketChannelFactory
clientBootstrap.setFactory(new NioClientSocketChannelFactory(boos,wook));
//4、设置管道工厂
clientBootstrap.setPipelineFactory(new ChannelPipelineFactory() {
//设置管道
@Override
public ChannelPipeline getPipeline() throws Exception {
ChannelPipeline channelPipeline=Channels.pipeline();
channelPipeline.addLast("decoder",new StringDecoder());
channelPipeline.addLast("encoder",new StringEncoder());
channelPipeline.addLast("ClientHandler",new ServerHanlder());
//设置事件监听类
return channelPipeline;
}
});
//绑定端口
ChannelFuture connect = clientBootstrap.connect(new InetSocketAddress("127.0.0.1", 8080));
System.out.println("netty 客户端端启动完毕。。。。。。。。。。");
Channel channel = connect.getChannel();
Scanner scanner=new Scanner(System.in);
while(true){
System.out.println("请输入内容：");
channel.write(scanner.next());
}
}
}
class ClientHanlder extends SimpleChannelHandler{
/**
* 通道关闭的时候触发
*/
@Override
public void channelClosed(ChannelHandlerContext ctx, ChannelStateEvent e) throws Exception {
super.channelClosed(ctx, e);
System.out.println("threadName:"+Thread.currentThread().getName()+"channelClosed................");
}
/**
* 必须是连接已经建立,关闭通道的时候才会触发.
*/
@Override
public void channelDisconnected(ChannelHandlerContext ctx, ChannelStateEvent e) throws Exception {
super.channelDisconnected(ctx, e);
System.out.println("threadName:"+Thread.currentThread().getName()+"channelDisconnected................");
}
/**
* 捕获异常
*/
@Override
public void exceptionCaught(ChannelHandlerContext ctx, ExceptionEvent e) throws Exception {
super.exceptionCaught(ctx, e);
System.out.println("threadName:"+Thread.currentThread().getName()+"exceptionCaught................");
}
/**
* 接受消息
*/
@Override
public void messageReceived(ChannelHandlerContext ctx, MessageEvent e) throws Exception {
super.messageReceived(ctx, e);
System.out.println("messageReceived................");
System.out.println("threadName:"+Thread.currentThread().getName()+" 客户端接受的消息是: \n"+e.getMessage());
ctx.getChannel().write("hello");//返回
}
}