EchoClientHandler

package net.xdclass.echo;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.util.CharsetUtil;
public class EchoClientHandler extends SimpleChannelInboundHandler<ByteBuf> {
    protected void channelRead0(ChannelHandlerContext ctx, ByteBuf msg) throws Exception {
        System.out.println("Client received: " + msg.toString(CharsetUtil.UTF_8));
    }
    @Override
    public void channelActive(ChannelHandlerContext ctx) throws Exception {
        System.out.println("Active");
        ctx.writeAndFlush(Unpooled.copiedBuffer("小滴课堂 xdclass.net",CharsetUtil.UTF_8));
    }
    @Override
    public void channelReadComplete(ChannelHandlerContext ctx) throws Exception {
        System.out.println("EchoClientHandler channelReadComplete");
    }
    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        cause.printStackTrace();
        ctx.close();
    }
}