完成

netty/service/src/main/java/cn/bunny/service/netty/demo7/HelloClient.java

@@ -0,0 +1,41 @@
+package cn.bunny.service.netty.demo7;
+
+import io.netty.bootstrap.Bootstrap;
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.channel.ChannelInboundHandlerAdapter;
+import io.netty.channel.ChannelInitializer;
+import io.netty.channel.nio.NioEventLoopGroup;
+import io.netty.channel.socket.SocketChannel;
+import io.netty.channel.socket.nio.NioSocketChannel;
+import lombok.extern.slf4j.Slf4j;
+
+@Slf4j
+public class HelloClient {
+    public static void main(String[] args) {
+        NioEventLoopGroup group = new NioEventLoopGroup();
+        try {
+            Bootstrap bootstrap = new Bootstrap();
+            bootstrap.channel(NioSocketChannel.class);
+            bootstrap.group(group);
+            bootstrap.handler(new ChannelInitializer<SocketChannel>() {
+                @Override
+                protected void initChannel(SocketChannel socketChannel) throws Exception {
+                    socketChannel.pipeline().addLast(new ChannelInboundHandlerAdapter() {
+                        @Override
+                        public void channelActive(ChannelHandlerContext ctx) throws Exception {
+                            ByteBuf buf = ctx.alloc().buffer(16);
+                            buf.writeBytes(new byte[]{0, 1, 2, 3, 4});
+                            ctx.writeAndFlush(buf);
+                            ctx.channel().close();
+                        }
+                    });
+                }
+            });
+        } catch (Exception e) {
+            log.debug("客户端错误：{}", e);
+        } finally {
+            group.shutdownGracefully();
+        }
+    }
+}