import io.netty.bootstrap.Bootstrap;
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import io.netty.channel.ChannelFuture;
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import io.netty.channel.ChannelInitializer;
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import io.netty.channel.EventLoopGroup;
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import io.netty.channel.nio.NioEventLoopGroup;
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import io.netty.channel.socket.SocketChannel;
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import io.netty.channel.socket.nio.NioSocketChannel;
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import java.net.InetSocketAddress;
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/**
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* Created by a on 2017/7/27.
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*/
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public class EchoClient {
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private final String host;
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private final int port;
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public EchoClient() {
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this(0);
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}
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public EchoClient(int port) {
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this("localhost", port);
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}
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public EchoClient(String host, int port) {
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this.host = host;
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this.port = port;
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}
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public void start() throws Exception {
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EventLoopGroup group = new NioEventLoopGroup();
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try {
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Bootstrap b = new Bootstrap();
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b.group(group) // 注册线程池
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.channel(NioSocketChannel.class) // 使用NioSocketChannel来作为连接用的channel类
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.remoteAddress(new InetSocketAddress(this.host, this.port)) // 绑定连接端口和host信息
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.handler(new ChannelInitializer<SocketChannel>() { // 绑定连接初始化器
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@Override
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protected void initChannel(SocketChannel ch) throws Exception {
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System.out.println("connected...");
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ch.pipeline().addLast(new EchoClientHandler());
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}
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});
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System.out.println("created..");
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ChannelFuture cf = b.connect().sync(); // 异步连接服务器
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System.out.println("connected..."); // 连接完成
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cf.channel().closeFuture().sync(); // 异步等待关闭连接channel
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System.out.println("closed.."); // 关闭完成
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} finally {
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group.shutdownGracefully().sync(); // 释放线程池资源
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}
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}
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public static void main(String[] args) throws Exception {
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new EchoClient("127.0.0.1", 65535).start(); // 连接127.0.0.1/65535，并启动
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}
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}
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