first commit

src/main/java/com/sipai/netty/NettyClientHandler.java

@@ -0,0 +1,56 @@
+package com.sipai.netty;
+
+import java.nio.charset.Charset;
+import java.util.Date;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.channel.ChannelInboundHandlerAdapter;
+
+public class NettyClientHandler extends ChannelInboundHandlerAdapter  {
+    /**
+     * 通道信息读取处理
+     * @param ctx
+     * @param msg
+     */
+    @Override
+    public void channelRead(ChannelHandlerContext ctx, Object msg) {
+        ByteBuf m = (ByteBuf) msg; // 将消息转化成bytebuf
+        try {
+            System.out.println("客户端直接打印接收到的消息: " + m.toString(Charset.defaultCharset()));
+            long currentTimeMillis = (m.readUnsignedInt() - 2208988800L) * 1000L;
+            System.out.println(new Date(currentTimeMillis));
+            /**
+             * 给服务端回复消息
+             */
+            ctx.writeAndFlush("客户端收到! 消息为: " + m.toString(Charset.defaultCharset()));
+        } finally {
+            m.release();
+        }
+    }
+
+    /**
+     * 连接成功后，自动执行该方法
+     * @param ctx
+     * @throws Exception
+     */
+    @Override
+    public void channelActive(ChannelHandlerContext ctx) throws Exception {
+        /**
+         * 往服务端发送消息
+         * 消息格式必须是ByteBuf才行!!!!!
+         * 如果是其他格式服务端是接收不到的!!!!
+         */
+        String helo = "你好呀!";
+        ByteBuf byteBuf = Unpooled.wrappedBuffer(helo.getBytes());
+        ctx.channel().writeAndFlush(byteBuf);
+        System.out.println("首次连接完成!");
+    }
+
+    @Override
+    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
+        cause.printStackTrace();
+        ctx.close();
+    }
+}