ChatServer/src/main/java/cn/com/zyjblogs/chat/netty/MyServerHandler.java

package cn.com.zyjblogs.chat.netty;


import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.util.CharsetUtil;

import java.util.UUID;

public class MyServerHandler extends SimpleChannelInboundHandler<MessageProtocol> {
    private int count=0;

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        ctx.close();
    }

    @Override
    protected void channelRead0(ChannelHandlerContext ctx, MessageProtocol msg) throws Exception {
        //接收数据，并处理
        System.out.println("服务端接收信息：");
        System.out.println("长度="+msg.getLen());
        System.out.println("内容="+new String(msg.getContent(),CharsetUtil.UTF_8));
        System.out.println("服务器接收消息包数量="+(++this.count));

        //回复消息
        String responseContent = UUID.randomUUID().toString();
        int responseLen = responseContent.getBytes(CharsetUtil.UTF_8).length;
        MessageProtocol messageProtocol = new MessageProtocol();
        messageProtocol.setLen(responseLen);
        messageProtocol.setContent(responseContent.getBytes(CharsetUtil.UTF_8));

        ctx.writeAndFlush(messageProtocol);

    }
}