NettyClient.java

package com.lincyang.rpc;

import com.alibaba.fastjson.JSONObject;
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.handler.codec.string.StringDecoder;

/**
 * @Author lincyang
 * @Date 2019/8/19 6:09 PM
 **/
public class NettyClient {

    public static void main(String[] args) {
        EventLoopGroup group = new NioEventLoopGroup();
        try{
            Bootstrap b = new Bootstrap();
            b.group(group)
                    .channel(NioSocketChannel.class)
                    .option(ChannelOption.TCP_NODELAY, true)
                    .handler(new ChannelInitializer<SocketChannel>() {
                        @Override
                        protected void initChannel(SocketChannel ch) throws Exception {
                            ch.pipeline().addLast(new StringDecoder());
                            ch.pipeline().addLast(new NettyClientHandler());
                        }
                    });
            ChannelFuture sync = b.connect("127.0.0.1", 50071).sync();
            sync.channel().closeFuture().sync();
        } catch(Exception e) {
            e.printStackTrace();
        } finally{
            group.shutdownGracefully();
        }
    }


    private static class NettyClientHandler extends ChannelInboundHandlerAdapter {

        @Override
        public void channelActive(ChannelHandlerContext ctx) throws Exception {
            JSONObject jsonObject = new JSONObject();
            jsonObject.put("interfaces", "interface=com.lincyang.rpc.service" +
                    ".HelloService&method=sayHello&parameter=com.lincyang.rpc.service.TestBean");
            JSONObject param = new JSONObject();
            JSONObject bean = new JSONObject();
            bean.put("age", 20);
            bean.put("name", "张三");
            param.put("com.lincyang.rpc.service.TestBean", bean);
            jsonObject.put("parameter", param);
            jsonObject.put("requestId", 3);
            System.out.println("发送给服务端JSON为：" + jsonObject.toJSONString());
            String msg = jsonObject.toJSONString() + "$$";
            ByteBuf byteBuf = Unpooled.buffer(msg.getBytes().length);
            byteBuf.writeBytes(msg.getBytes());
            ctx.writeAndFlush(byteBuf);
        }

        @Override
        public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
            System.out.println("收到消息:" + msg);
        }
    }
}