first commit

io-study-master/io-study/src/main/java/netty/chat/server/DiscardServer.java

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+package netty.chat.server;
+
+import io.netty.bootstrap.ServerBootstrap;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.ChannelFuture;
+import io.netty.channel.ChannelInitializer;
+import io.netty.channel.ChannelOption;
+import io.netty.channel.EventLoopGroup;
+import io.netty.channel.nio.NioEventLoopGroup;
+import io.netty.channel.socket.SocketChannel;
+import io.netty.channel.socket.nio.NioServerSocketChannel;
+import io.netty.handler.codec.DelimiterBasedFrameDecoder;
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import netty.chat.handler.DiscardServerHandler;
+
+import java.nio.charset.Charset;
+
+/**
+ * @description:
+ * @author: lld
+ * @version: 1.0
+ */
+public class DiscardServer {
+
+    private int port;
+
+    public DiscardServer(int port) {
+        this.port = port;
+    }
+
+    public void run() throws Exception {
+        EventLoopGroup bossGroup = new NioEventLoopGroup(1); //线程池
+        EventLoopGroup workerGroup = new NioEventLoopGroup();//
+
+        try {
+            ServerBootstrap b = new ServerBootstrap(); // (2)
+            b.group(bossGroup, workerGroup)
+                    .channel(NioServerSocketChannel.class) // (3)
+                    .childHandler(new ChannelInitializer<SocketChannel>() { // (4)
+                        @Override
+                        public void initChannel(SocketChannel ch) throws Exception {
+                            Charset gbk = Charset.forName("utf-8");
+                            ch.pipeline().addLast(new DelimiterBasedFrameDecoder(1024, Unpooled.copiedBuffer("_"
+                                    .getBytes())));
+                            ch.pipeline().addLast("encoder", new StringEncoder(gbk));//out
+                            ch.pipeline().addLast("decoder", new StringDecoder(gbk));//in
+                            ch.pipeline().addLast(new DiscardServerHandler());
+                        }
+                    })
+                    .option(ChannelOption.SO_BACKLOG, 128)          // (5)
+                    .childOption(ChannelOption.SO_KEEPALIVE, true); // (6)
+
+            // Bind and start to accept incoming connections.
+            System.out.println("tcp start success");
+            ChannelFuture f = b.bind(port).sync(); // (7)
+
+
+            // Wait until the server socket is closed.
+            // In this example, this does not happen, but you can do that to gracefully
+            // shut down your server.
+            f.channel().closeFuture().sync();
+        } finally {
+            workerGroup.shutdownGracefully();
+            bossGroup.shutdownGracefully();
+        }
+    }
+
+}