经过了前面的NIO基础知识准备，我们已经对NIO有了较大了解，现在就进入netty的实际应用中来看看吧。重点体会整个过程。
按照权威指南写程序的过程中，发现一些问题：当我们在定义handler继承ChannelHanderAdapter时候，发现在其接口中没有可以实现的channelRead方法和channelReadComplete方法,然后查阅官网才发现netty5.0不见了，网上说是舍弃了，然后再看官网的一些例子，发现官网上继承的是ChannelInboundHandlerAdapter,当我将代码中handler的继承类更改为这个的时候发现前面的方法可以实现了。（同时发现ByteBuffer的一些方法调用不能调出书上的方法如readableBytes(),这个是我弄错了，ByteBuffer是jdk的包装类不是netty的，netty的应该用ByteBuf）为此将netty版本变更为
一、首先我们需要一个netty的环境，netty的环境搭建只需要一个netty的jar包即可。
在maven工程中导入netty的jar资源
1 <dependency> 2 <groupId>io.netty</groupId> 3 <artifactId>netty-all</artifactId> 4 <!--<version>5.0.0.Alpha1</version>--> 5 <version>4.1.25.Final</version> 6 </dependency>
二、netty 服务端代码
TimeServer
1 package com.netty.example; 2 3 import io.netty.bootstrap.ServerBootstrap; 4 import io.netty.channel.ChannelFuture; 5 import io.netty.channel.ChannelInitializer; 6 import io.netty.channel.ChannelOption; 7 import io.netty.channel.EventLoopGroup; 8 import io.netty.channel.nio.NioEventLoopGroup; 9 import io.netty.channel.socket.SocketChannel; 10 import io.netty.channel.socket.nio.NioServerSocketChannel; 11 12 public class TimeServer { 13 public void bind(int port){ 14 // 创建接收任务的线程组和处理IO事件的线程组 15 EventLoopGroup boosGroup = new NioEventLoopGroup(); 16 EventLoopGroup workGroup = new NioEventLoopGroup(); 17 try { 18 ServerBootstrap bs = new ServerBootstrap(); 19 bs.group(boosGroup,workGroup) 20 .channel(NioServerSocketChannel.class) 21 .option(ChannelOption.SO_BACKLOG,1024) 22 .childHandler(new ChildChannelHandler()); 23 // 绑定端口号，同步等待成功 24 ChannelFuture f = bs.bind(port).sync(); 25 // 等待服务器监听端口关闭 26 f.channel().closeFuture().sync(); 27 } catch (InterruptedException e) { 28 e.printStackTrace(); 29 }finally { 30 // 优雅退出释放线程池资源 31 boosGroup.shutdownGracefully(); 32 workGroup.shutdownGracefully(); 33 } 34 } 35 public static void main(String[] args){ 36 int port = 8080; 37 if(args!=null&&args.length>0){ 38 port = Integer.valueOf(args[0]); 39 } 40 new TimeServer().bind(port); 41 } 42 43 private class ChildChannelHandler extends ChannelInitializer<SocketChannel>{ 44 @Override 45 protected void initChannel(SocketChannel socketChannel) throws Exception { 46 socketChannel.pipeline().addLast(new TimeServerHandler()); 47 } 48 49 } 50 51 }
TimeServerHandler
1 package com.netty.example; 2 3 import io.netty.buffer.ByteBuf; 4 import io.netty.buffer.Unpooled; 5 import io.netty.channel.ChannelHandlerContext; 6 import io.netty.channel.ChannelInboundHandlerAdapter; 7 8 import java.util.Date; 9 10 public class TimeServerHandler extends ChannelInboundHandlerAdapter { 11 12 13 @Override 14 public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception { 15 ByteBuf buf = (ByteBuf) msg;//将接收到的msg转换为netty的BytyBuf对象，注意区分jdk中的ByteBuffer 16 byte[] req = new byte[buf.readableBytes()];//创建接收缓冲区数据的字节数组 17 buf.readBytes(req);//将缓冲区的数据读取到字节数组中 18 String body = new String(req,"utf-8");//获取请求消息 19 System.out.println("The time server receive order:"+body); 20 String currentTime = "QUERY TIME ORDER".equalsIgnoreCase(body)?new Date(System.currentTimeMillis()).toString():"BAD ORDER"; 21 ByteBuf resp = Unpooled.copiedBuffer(currentTime.getBytes());//将响应信息封装为netty 的ByteBuf对象， 22 ctx.write(resp);//异步发送应答消息给客户端 23 } 24 25 @Override 26 public void channelReadComplete(ChannelHandlerContext ctx) throws Exception { 27 /*将消息发送队列中的消息写道SocketChannel中发送给对方。从性能上考虑，为了防止频繁唤醒Selector进行消息发送 28 * netty的write方法并不直接将消息写入socketChannel中，调用write方法只是把待发送的消息发送到数据缓冲数组中， 29 * 再通过调用flush()方法，将发送缓冲区中的消息全部写道SocketChannel中*/ 30 ctx.flush(); 31 } 32 33 @Override 34 public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception { 35 ctx.close();//发生异常时，关闭ChannelHandlerContext,释放ChannelHandlerContext相关联的句柄资源 36 } 37 }
三、netty 客户端代码
TimeClient
1 package com.netty.example; 2 3 import io.netty.bootstrap.Bootstrap; 4 import io.netty.channel.ChannelFuture; 5 import io.netty.channel.ChannelInitializer; 6 import io.netty.channel.ChannelOption; 7 import io.netty.channel.EventLoopGroup; 8 import io.netty.channel.nio.NioEventLoopGroup; 9 import io.netty.channel.socket.SocketChannel; 10 import io.netty.channel.socket.nio.NioSocketChannel; 11 12 /* 13 * 客户端代码 14 * */ 15 public class TimeClient { 16 // 配置客户端NIO线程 17 public void connection(String host,int port) { 18 EventLoopGroup group = new NioEventLoopGroup(); 19 try { 20 Bootstrap bootstrap = new Bootstrap(); 21 bootstrap.group(group) 22 .channel(NioSocketChannel.class) 23 .option(ChannelOption.TCP_NODELAY,true) 24 .handler(new ChannelInitializer<SocketChannel>() { 25 @Override 26 protected void initChannel(SocketChannel socketChannel) throws Exception { 27 socketChannel.pipeline().addLast(new TimeClientHandler()); 28 } 29 }); 30 // 发起异步连接操作 31 ChannelFuture f = bootstrap.connect(host,port).sync(); 32 // 等待客户端链路关闭 33 f.channel().closeFuture().sync(); 34 } catch (InterruptedException e) { 35 e.printStackTrace(); 36 }finally{ 37 group.shutdownGracefully(); 38 } 39 40 } 41 public static void main(String[] args){ 42 int port = 8080; 43 if(args.length>0&&args!=null){ 44 port = Integer.valueOf(args[0]); 45 } 46 new TimeClient().connection("127.0.0.1",port); 47 } 48 }
TimeClientHandler
1 package com.netty.example; 2 3 import io.netty.buffer.ByteBuf; 4 import io.netty.buffer.Unpooled; 5 import io.netty.channel.ChannelHandlerContext; 6 import io.netty.channel.ChannelInboundHandlerAdapter; 7 8 public class TimeClientHandler extends ChannelInboundHandlerAdapter { 9 private final ByteBuf firstMsg; 10 11 public TimeClientHandler() { 12 byte[] req = "QUERY TIME ORDER".getBytes(); 13 firstMsg = Unpooled.buffer(req.length); 14 firstMsg.writeBytes(req); 15 } 16 17 @Override 18 public void channelActive(ChannelHandlerContext ctx) throws Exception { 19 /* 当客户端和服务端TCP链路建立成功之后，Netty的NIO线程会调用channelActive方法，发送查询时间的指令给服务端， 20 调用ChannelHandlerContext的writeAndFlush方法将请求消息发送给服务端 21 当服务端返回应答消息时，channelRead()方法被调用*/ 22 ctx.writeAndFlush(firstMsg); 23 } 24 25 @Override 26 public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception { 27 ByteBuf buf = (ByteBuf) msg; 28 byte[] req = new byte[buf.readableBytes()]; 29 buf.readBytes(req); 30 String body = new String(req,"utf-8"); 31 System.out.println("Now is"+body); 32 } 33 34 @Override 35 public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception { 36 ctx.close(); 37 } 38 }
四、启动运行
开启服务端
1 D:javajava1.8jdk1.8injava.exe "-javaagent:D:我的软件itSoftIntelliJ IDEAIntelliJ IDEA 2018.1.5libidea_rt.jar=59255:D:我的软件itSoftIntelliJ IDEAIntelliJ IDEA 2018.1.5in" -Dfile.encoding=UTF-8 -classpath D:javajava1.8jdk1.8jrelibcharsets.jar;D:javajava1.8jdk1.8jrelibdeploy.jar;D:javajava1.8jdk1.8jrelibextaccess-bridge-64.jar;D:javajava1.8jdk1.8jrelibextcldrdata.jar;D:javajava1.8jdk1.8jrelibextdnsns.jar;D:javajava1.8jdk1.8jrelibextjaccess.jar;D:javajava1.8jdk1.8jrelibextjfxrt.jar;D:javajava1.8jdk1.8jrelibextlocaledata.jar;D:javajava1.8jdk1.8jrelibext ashorn.jar;D:javajava1.8jdk1.8jrelibextsunec.jar;D:javajava1.8jdk1.8jrelibextsunjce_provider.jar;D:javajava1.8jdk1.8jrelibextsunmscapi.jar;D:javajava1.8jdk1.8jrelibextsunpkcs11.jar;D:javajava1.8jdk1.8jrelibextzipfs.jar;D:javajava1.8jdk1.8jrelibjavaws.jar;D:javajava1.8jdk1.8jrelibjce.jar;D:javajava1.8jdk1.8jrelibjfr.jar;D:javajava1.8jdk1.8jrelibjfxswt.jar;D:javajava1.8jdk1.8jrelibjsse.jar;D:javajava1.8jdk1.8jrelibmanagement-agent.jar;D:javajava1.8jdk1.8jrelibplugin.jar;D:javajava1.8jdk1.8jrelib esources.jar;D:javajava1.8jdk1.8jrelib t.jar;D: etty argetclasses;C:Userslitan.m2 epositoryorgspringframeworkootspring-boot-starter-data-redis2.0.3.RELEASEspring-boot-starter-data-redis-2.0.3.RELEASE.jar;C:Userslitan.m2 epositoryorgspringframeworkootspring-boot-starter2.0.3.RELEASEspring-boot-starter-2.0.3.RELEASE.jar;C:Userslitan.m2 epositoryorgspringframeworkootspring-boot2.0.3.RELEASEspring-boot-2.0.3.RELEASE.jar;C:Userslitan.m2 epositoryorgspringframeworkootspring-boot-autoconfigure2.0.3.RELEASEspring-boot-autoconfigure-2.0.3.RELEASE.jar;C:Userslitan.m2 epositoryorgspringframeworkootspring-boot-starter-logging2.0.3.RELEASEspring-boot-starter-logging-2.0.3.RELEASE.jar;C:Userslitan.m2 epositorychqoslogbacklogback-classic1.2.3logback-classic-1.2.3.jar;C:Userslitan.m2 epositorychqoslogbacklogback-core1.2.3logback-core-1.2.3.jar;C:Userslitan.m2 epositoryorgapachelogginglog4jlog4j-to-slf4j2.10.0log4j-to-slf4j-2.10.0.jar;C:Userslitan.m2 epositoryorgapachelogginglog4jlog4j-api2.10.0log4j-api-2.10.0.jar;C:Userslitan.m2 epositoryorgslf4jjul-to-slf4j1.7.25jul-to-slf4j-1.7.25.jar;C:Userslitan.m2 epositoryjavaxannotationjavax.annotation-api1.3.2javax.annotation-api-1.3.2.jar;C:Userslitan.m2 epositoryorgyamlsnakeyaml1.19snakeyaml-1.19.jar;C:Userslitan.m2 epositoryorgspringframeworkdataspring-data-redis2.0.8.RELEASEspring-data-redis-2.0.8.RELEASE.jar;C:Userslitan.m2 epositoryorgspringframeworkdataspring-data-keyvalue2.0.8.RELEASEspring-data-keyvalue-2.0.8.RELEASE.jar;C:Userslitan.m2 epositoryorgspringframeworkdataspring-data-commons2.0.8.RELEASEspring-data-commons-2.0.8.RELEASE.jar;C:Userslitan.m2 epositoryorgspringframeworkspring-tx5.0.7.RELEASEspring-tx-5.0.7.RELEASE.jar;C:Userslitan.m2 epositoryorgspringframeworkspring-oxm5.0.7.RELEASEspring-oxm-5.0.7.RELEASE.jar;C:Userslitan.m2 epositoryorgspringframeworkspring-aop5.0.7.RELEASEspring-aop-5.0.7.RELEASE.jar;C:Userslitan.m2 epositoryorgspringframeworkspring-context-support5.0.7.RELEASEspring-context-support-5.0.7.RELEASE.jar;C:Userslitan.m2 epositoryorgslf4jslf4j-api1.7.25slf4j-api-1.7.25.jar;C:Userslitan.m2 epositoryiolettucelettuce-core5.0.4.RELEASElettuce-core-5.0.4.RELEASE.jar;C:Userslitan.m2 epositoryioprojectreactor eactor-core3.1.8.RELEASE eactor-core-3.1.8.RELEASE.jar;C:Userslitan.m2 epositoryorg eactivestreams eactive-streams1.0.2 eactive-streams-1.0.2.jar;C:Userslitan.m2 epositoryio etty etty-common4.1.25.Final etty-common-4.1.25.Final.jar;C:Userslitan.m2 epositoryio etty etty-transport4.1.25.Final etty-transport-4.1.25.Final.jar;C:Userslitan.m2 epositoryio etty etty-buffer4.1.25.Final etty-buffer-4.1.25.Final.jar;C:Userslitan.m2 epositoryio etty etty-resolver4.1.25.Final etty-resolver-4.1.25.Final.jar;C:Userslitan.m2 epositoryio etty etty-handler4.1.25.Final etty-handler-4.1.25.Final.jar;C:Userslitan.m2 epositoryio etty etty-codec4.1.25.Final etty-codec-4.1.25.Final.jar;C:Userslitan.m2 epositoryorgspringframeworkootspring-boot-starter-web2.0.3.RELEASEspring-boot-starter-web-2.0.3.RELEASE.jar;C:Userslitan.m2 epositoryorgspringframeworkootspring-boot-starter-json2.0.3.RELEASEspring-boot-starter-json-2.0.3.RELEASE.jar;C:Userslitan.m2 epositorycomfasterxmljacksoncorejackson-databind2.9.6jackson-databind-2.9.6.jar;C:Userslitan.m2 epositorycomfasterxmljacksoncorejackson-annotations2.9.0jackson-annotations-2.9.0.jar;C:Userslitan.m2 epositorycomfasterxmljacksoncorejackson-core2.9.6jackson-core-2.9.6.jar;C:Userslitan.m2 epositorycomfasterxmljacksondatatypejackson-datatype-jdk82.9.6jackson-datatype-jdk8-2.9.6.jar;C:Userslitan.m2 epositorycomfasterxmljacksondatatypejackson-datatype-jsr3102.9.6jackson-datatype-jsr310-2.9.6.jar;C:Userslitan.m2 epositorycomfasterxmljacksonmodulejackson-module-parameter-names2.9.6jackson-module-parameter-names-2.9.6.jar;C:Userslitan.m2 epositoryorgspringframeworkootspring-boot-starter-tomcat2.0.3.RELEASEspring-boot-starter-tomcat-2.0.3.RELEASE.jar;C:Userslitan.m2 epositoryorgapache omcatembed omcat-embed-core8.5.31 omcat-embed-core-8.5.31.jar;C:Userslitan.m2 epositoryorgapache omcatembed omcat-embed-el8.5.31 omcat-embed-el-8.5.31.jar;C:Userslitan.m2 epositoryorgapache omcatembed omcat-embed-websocket8.5.31 omcat-embed-websocket-8.5.31.jar;C:Userslitan.m2 epositoryorghibernatevalidatorhibernate-validator6.0.10.Finalhibernate-validator-6.0.10.Final.jar;C:Userslitan.m2 epositoryjavaxvalidationvalidation-api2.0.1.Finalvalidation-api-2.0.1.Final.jar;C:Userslitan.m2 epositoryorgjbossloggingjboss-logging3.3.2.Finaljboss-logging-3.3.2.Final.jar;C:Userslitan.m2 epositorycomfasterxmlclassmate1.3.4classmate-1.3.4.jar;C:Userslitan.m2 epositoryorgspringframeworkspring-web5.0.7.RELEASEspring-web-5.0.7.RELEASE.jar;C:Userslitan.m2 epositoryorgspringframeworkspring-beans5.0.7.RELEASEspring-beans-5.0.7.RELEASE.jar;C:Userslitan.m2 epositoryorgspringframeworkspring-webmvc5.0.7.RELEASEspring-webmvc-5.0.7.RELEASE.jar;C:Userslitan.m2 epositoryorgspringframeworkspring-context5.0.7.RELEASEspring-context-5.0.7.RELEASE.jar;C:Userslitan.m2 epositoryorgspringframeworkspring-expression5.0.7.RELEASEspring-expression-5.0.7.RELEASE.jar;C:Userslitan.m2 epositorymysqlmysql-connector-java5.1.46mysql-connector-java-5.1.46.jar;C:Userslitan.m2 epositoryorgspringframeworkspring-core5.0.7.RELEASEspring-core-5.0.7.RELEASE.jar;C:Userslitan.m2 epositoryorgspringframeworkspring-jcl5.0.7.RELEASEspring-jcl-5.0.7.RELEASE.jar;C:Userslitan.m2 epositoryio etty etty-all4.1.25.Final etty-all-4.1.25.Final.jar com.netty.example.TimeServer 2 22:06:36.427 [main] DEBUG io.netty.util.internal.logging.InternalLoggerFactory - Using SLF4J as the default logging framework 3 22:06:36.462 [main] DEBUG io.netty.channel.MultithreadEventLoopGroup - -Dio.netty.eventLoopThreads: 8 4 22:06:36.509 [main] DEBUG io.netty.channel.nio.NioEventLoop - -Dio.netty.noKeySetOptimization: false 5 22:06:36.509 [main] DEBUG io.netty.channel.nio.NioEventLoop - -Dio.netty.selectorAutoRebuildThreshold: 512 6 22:06:36.556 [main] DEBUG io.netty.util.internal.PlatformDependent - Platform: Windows 7 22:06:36.562 [main] DEBUG io.netty.util.internal.PlatformDependent0 - -Dio.netty.noUnsafe: false 8 22:06:36.563 [main] DEBUG io.netty.util.internal.PlatformDependent0 - Java version: 8 9 22:06:36.567 [main] DEBUG io.netty.util.internal.PlatformDependent0 - sun.misc.Unsafe.theUnsafe: available 10 22:06:36.568 [main] DEBUG io.netty.util.internal.PlatformDependent0 - sun.misc.Unsafe.copyMemory: available 11 22:06:36.569 [main] DEBUG io.netty.util.internal.PlatformDependent0 - java.nio.Buffer.address: available 12 22:06:36.570 [main] DEBUG io.netty.util.internal.PlatformDependent0 - direct buffer constructor: available 13 22:06:36.571 [main] DEBUG io.netty.util.internal.PlatformDependent0 - java.nio.Bits.unaligned: available, true 14 22:06:36.571 [main] DEBUG io.netty.util.internal.PlatformDependent0 - jdk.internal.misc.Unsafe.allocateUninitializedArray(int): unavailable prior to Java9 15 22:06:36.571 [main] DEBUG io.netty.util.internal.PlatformDependent0 - java.nio.DirectByteBuffer.<init>(long, int): available 16 22:06:36.571 [main] DEBUG io.netty.util.internal.PlatformDependent - sun.misc.Unsafe: available 17 22:06:36.573 [main] DEBUG io.netty.util.internal.PlatformDependent - -Dio.netty.tmpdir: C:UserslitanAppDataLocalTemp (java.io.tmpdir) 18 22:06:36.575 [main] DEBUG io.netty.util.internal.PlatformDependent - -Dio.netty.bitMode: 64 (sun.arch.data.model) 19 22:06:36.577 [main] DEBUG io.netty.util.internal.PlatformDependent - -Dio.netty.noPreferDirect: false 20 22:06:36.577 [main] DEBUG io.netty.util.internal.PlatformDependent - -Dio.netty.maxDirectMemory: 1890582528 bytes 21 22:06:36.577 [main] DEBUG io.netty.util.internal.PlatformDependent - -Dio.netty.uninitializedArrayAllocationThreshold: -1 22 22:06:36.581 [main] DEBUG io.netty.util.internal.CleanerJava6 - java.nio.ByteBuffer.cleaner(): available 23 22:06:36.595 [main] DEBUG io.netty.util.internal.PlatformDependent - org.jctools-core.MpscChunkedArrayQueue: available 24 22:06:37.179 [main] DEBUG io.netty.channel.DefaultChannelId - -Dio.netty.processId: 14124 (auto-detected) 25 22:06:37.186 [main] DEBUG io.netty.util.NetUtil - -Djava.net.preferIPv4Stack: false 26 22:06:37.186 [main] DEBUG io.netty.util.NetUtil - -Djava.net.preferIPv6Addresses: false 27 22:06:37.538 [main] DEBUG io.netty.util.NetUtil - Loopback interface: lo (Software Loopback Interface 1, 127.0.0.1) 28 22:06:37.540 [main] DEBUG io.netty.util.NetUtil - Failed to get SOMAXCONN from sysctl and file procsys etcoresomaxconn. Default: 200 29 22:06:38.027 [main] DEBUG io.netty.channel.DefaultChannelId - -Dio.netty.machineId: 00:50:56:ff:fe:c0:00:01 (auto-detected) 30 22:06:38.038 [main] DEBUG io.netty.util.internal.InternalThreadLocalMap - -Dio.netty.threadLocalMap.stringBuilder.initialSize: 1024 31 22:06:38.038 [main] DEBUG io.netty.util.internal.InternalThreadLocalMap - -Dio.netty.threadLocalMap.stringBuilder.maxSize: 4096 32 22:06:38.090 [main] DEBUG io.netty.util.ResourceLeakDetector - -Dio.netty.leakDetection.level: simple 33 22:06:38.091 [main] DEBUG io.netty.util.ResourceLeakDetector - -Dio.netty.leakDetection.targetRecords: 4 34 22:06:38.144 [main] DEBUG io.netty.buffer.PooledByteBufAllocator - -Dio.netty.allocator.numHeapArenas: 8 35 22:06:38.145 [main] DEBUG io.netty.buffer.PooledByteBufAllocator - -Dio.netty.allocator.numDirectArenas: 8 36 22:06:38.145 [main] DEBUG io.netty.buffer.PooledByteBufAllocator - -Dio.netty.allocator.pageSize: 8192 37 22:06:38.145 [main] DEBUG io.netty.buffer.PooledByteBufAllocator - -Dio.netty.allocator.maxOrder: 11 38 22:06:38.145 [main] DEBUG io.netty.buffer.PooledByteBufAllocator - -Dio.netty.allocator.chunkSize: 16777216 39 22:06:38.145 [main] DEBUG io.netty.buffer.PooledByteBufAllocator - -Dio.netty.allocator.tinyCacheSize: 512 40 22:06:38.145 [main] DEBUG io.netty.buffer.PooledByteBufAllocator - -Dio.netty.allocator.smallCacheSize: 256 41 22:06:38.145 [main] DEBUG io.netty.buffer.PooledByteBufAllocator - -Dio.netty.allocator.normalCacheSize: 64 42 22:06:38.145 [main] DEBUG io.netty.buffer.PooledByteBufAllocator - -Dio.netty.allocator.maxCachedBufferCapacity: 32768 43 22:06:38.145 [main] DEBUG io.netty.buffer.PooledByteBufAllocator - -Dio.netty.allocator.cacheTrimInterval: 8192 44 22:06:38.145 [main] DEBUG io.netty.buffer.PooledByteBufAllocator - -Dio.netty.allocator.useCacheForAllThreads: true 45 22:06:38.159 [main] DEBUG io.netty.buffer.ByteBufUtil - -Dio.netty.allocator.type: pooled 46 22:06:38.159 [main] DEBUG io.netty.buffer.ByteBufUtil - -Dio.netty.threadLocalDirectBufferSize: 0 47 22:06:38.159 [main] DEBUG io.netty.buffer.ByteBufUtil - -Dio.netty.maxThreadLocalCharBufferSize: 16384
客户端运行后
1 D:javajava1.8jdk1.8injava.exe "-javaagent:D:我的软件itSoftIntelliJ IDEAIntelliJ IDEA 2018.1.5libidea_rt.jar=59302:D:我的软件itSoftIntelliJ IDEAIntelliJ IDEA 2018.1.5in" -Dfile.encoding=UTF-8 -classpath D:javajava1.8jdk1.8jrelibcharsets.jar;D:javajava1.8jdk1.8jrelibdeploy.jar;D:javajava1.8jdk1.8jrelibextaccess-bridge-64.jar;D:javajava1.8jdk1.8jrelibextcldrdata.jar;D:javajava1.8jdk1.8jrelibextdnsns.jar;D:javajava1.8jdk1.8jrelibextjaccess.jar;D:javajava1.8jdk1.8jrelibextjfxrt.jar;D:javajava1.8jdk1.8jrelibextlocaledata.jar;D:javajava1.8jdk1.8jrelibext ashorn.jar;D:javajava1.8jdk1.8jrelibextsunec.jar;D:javajava1.8jdk1.8jrelibextsunjce_provider.jar;D:javajava1.8jdk1.8jrelibextsunmscapi.jar;D:javajava1.8jdk1.8jrelibextsunpkcs11.jar;D:javajava1.8jdk1.8jrelibextzipfs.jar;D:javajava1.8jdk1.8jrelibjavaws.jar;D:javajava1.8jdk1.8jrelibjce.jar;D:javajava1.8jdk1.8jrelibjfr.jar;D:javajava1.8jdk1.8jrelibjfxswt.jar;D:javajava1.8jdk1.8jrelibjsse.jar;D:javajava1.8jdk1.8jrelibmanagement-agent.jar;D:javajava1.8jdk1.8jrelibplugin.jar;D:javajava1.8jdk1.8jrelib esources.jar;D:javajava1.8jdk1.8jrelib t.jar;D: etty argetclasses;C:Userslitan.m2 epositoryorgspringframeworkootspring-boot-starter-data-redis2.0.3.RELEASEspring-boot-starter-data-redis-2.0.3.RELEASE.jar;C:Userslitan.m2 epositoryorgspringframeworkootspring-boot-starter2.0.3.RELEASEspring-boot-starter-2.0.3.RELEASE.jar;C:Userslitan.m2 epositoryorgspringframeworkootspring-boot2.0.3.RELEASEspring-boot-2.0.3.RELEASE.jar;C:Userslitan.m2 epositoryorgspringframeworkootspring-boot-autoconfigure2.0.3.RELEASEspring-boot-autoconfigure-2.0.3.RELEASE.jar;C:Userslitan.m2 epositoryorgspringframeworkootspring-boot-starter-logging2.0.3.RELEASEspring-boot-starter-logging-2.0.3.RELEASE.jar;C:Userslitan.m2 epositorychqoslogbacklogback-classic1.2.3logback-classic-1.2.3.jar;C:Userslitan.m2 epositorychqoslogbacklogback-core1.2.3logback-core-1.2.3.jar;C:Userslitan.m2 epositoryorgapachelogginglog4jlog4j-to-slf4j2.10.0log4j-to-slf4j-2.10.0.jar;C:Userslitan.m2 epositoryorgapachelogginglog4jlog4j-api2.10.0log4j-api-2.10.0.jar;C:Userslitan.m2 epositoryorgslf4jjul-to-slf4j1.7.25jul-to-slf4j-1.7.25.jar;C:Userslitan.m2 epositoryjavaxannotationjavax.annotation-api1.3.2javax.annotation-api-1.3.2.jar;C:Userslitan.m2 epositoryorgyamlsnakeyaml1.19snakeyaml-1.19.jar;C:Userslitan.m2 epositoryorgspringframeworkdataspring-data-redis2.0.8.RELEASEspring-data-redis-2.0.8.RELEASE.jar;C:Userslitan.m2 epositoryorgspringframeworkdataspring-data-keyvalue2.0.8.RELEASEspring-data-keyvalue-2.0.8.RELEASE.jar;C:Userslitan.m2 epositoryorgspringframeworkdataspring-data-commons2.0.8.RELEASEspring-data-commons-2.0.8.RELEASE.jar;C:Userslitan.m2 epositoryorgspringframeworkspring-tx5.0.7.RELEASEspring-tx-5.0.7.RELEASE.jar;C:Userslitan.m2 epositoryorgspringframeworkspring-oxm5.0.7.RELEASEspring-oxm-5.0.7.RELEASE.jar;C:Userslitan.m2 epositoryorgspringframeworkspring-aop5.0.7.RELEASEspring-aop-5.0.7.RELEASE.jar;C:Userslitan.m2 epositoryorgspringframeworkspring-context-support5.0.7.RELEASEspring-context-support-5.0.7.RELEASE.jar;C:Userslitan.m2 epositoryorgslf4jslf4j-api1.7.25slf4j-api-1.7.25.jar;C:Userslitan.m2 epositoryiolettucelettuce-core5.0.4.RELEASElettuce-core-5.0.4.RELEASE.jar;C:Userslitan.m2 epositoryioprojectreactor eactor-core3.1.8.RELEASE eactor-core-3.1.8.RELEASE.jar;C:Userslitan.m2 epositoryorg eactivestreams eactive-streams1.0.2 eactive-streams-1.0.2.jar;C:Userslitan.m2 epositoryio etty etty-common4.1.25.Final etty-common-4.1.25.Final.jar;C:Userslitan.m2 epositoryio etty etty-transport4.1.25.Final etty-transport-4.1.25.Final.jar;C:Userslitan.m2 epositoryio etty etty-buffer4.1.25.Final etty-buffer-4.1.25.Final.jar;C:Userslitan.m2 epositoryio etty etty-resolver4.1.25.Final etty-resolver-4.1.25.Final.jar;C:Userslitan.m2 epositoryio etty etty-handler4.1.25.Final etty-handler-4.1.25.Final.jar;C:Userslitan.m2 epositoryio etty etty-codec4.1.25.Final etty-codec-4.1.25.Final.jar;C:Userslitan.m2 epositoryorgspringframeworkootspring-boot-starter-web2.0.3.RELEASEspring-boot-starter-web-2.0.3.RELEASE.jar;C:Userslitan.m2 epositoryorgspringframeworkootspring-boot-starter-json2.0.3.RELEASEspring-boot-starter-json-2.0.3.RELEASE.jar;C:Userslitan.m2 epositorycomfasterxmljacksoncorejackson-databind2.9.6jackson-databind-2.9.6.jar;C:Userslitan.m2 epositorycomfasterxmljacksoncorejackson-annotations2.9.0jackson-annotations-2.9.0.jar;C:Userslitan.m2 epositorycomfasterxmljacksoncorejackson-core2.9.6jackson-core-2.9.6.jar;C:Userslitan.m2 epositorycomfasterxmljacksondatatypejackson-datatype-jdk82.9.6jackson-datatype-jdk8-2.9.6.jar;C:Userslitan.m2 epositorycomfasterxmljacksondatatypejackson-datatype-jsr3102.9.6jackson-datatype-jsr310-2.9.6.jar;C:Userslitan.m2 epositorycomfasterxmljacksonmodulejackson-module-parameter-names2.9.6jackson-module-parameter-names-2.9.6.jar;C:Userslitan.m2 epositoryorgspringframeworkootspring-boot-starter-tomcat2.0.3.RELEASEspring-boot-starter-tomcat-2.0.3.RELEASE.jar;C:Userslitan.m2 epositoryorgapache omcatembed omcat-embed-core8.5.31 omcat-embed-core-8.5.31.jar;C:Userslitan.m2 epositoryorgapache omcatembed omcat-embed-el8.5.31 omcat-embed-el-8.5.31.jar;C:Userslitan.m2 epositoryorgapache omcatembed omcat-embed-websocket8.5.31 omcat-embed-websocket-8.5.31.jar;C:Userslitan.m2 epositoryorghibernatevalidatorhibernate-validator6.0.10.Finalhibernate-validator-6.0.10.Final.jar;C:Userslitan.m2 epositoryjavaxvalidationvalidation-api2.0.1.Finalvalidation-api-2.0.1.Final.jar;C:Userslitan.m2 epositoryorgjbossloggingjboss-logging3.3.2.Finaljboss-logging-3.3.2.Final.jar;C:Userslitan.m2 epositorycomfasterxmlclassmate1.3.4classmate-1.3.4.jar;C:Userslitan.m2 epositoryorgspringframeworkspring-web5.0.7.RELEASEspring-web-5.0.7.RELEASE.jar;C:Userslitan.m2 epositoryorgspringframeworkspring-beans5.0.7.RELEASEspring-beans-5.0.7.RELEASE.jar;C:Userslitan.m2 epositoryorgspringframeworkspring-webmvc5.0.7.RELEASEspring-webmvc-5.0.7.RELEASE.jar;C:Userslitan.m2 epositoryorgspringframeworkspring-context5.0.7.RELEASEspring-context-5.0.7.RELEASE.jar;C:Userslitan.m2 epositoryorgspringframeworkspring-expression5.0.7.RELEASEspring-expression-5.0.7.RELEASE.jar;C:Userslitan.m2 epositorymysqlmysql-connector-java5.1.46mysql-connector-java-5.1.46.jar;C:Userslitan.m2 epositoryorgspringframeworkspring-core5.0.7.RELEASEspring-core-5.0.7.RELEASE.jar;C:Userslitan.m2 epositoryorgspringframeworkspring-jcl5.0.7.RELEASEspring-jcl-5.0.7.RELEASE.jar;C:Userslitan.m2 epositoryio etty etty-all4.1.25.Final etty-all-4.1.25.Final.jar com.netty.example.TimeClient 2 22:07:35.228 [main] DEBUG io.netty.util.internal.logging.InternalLoggerFactory - Using SLF4J as the default logging framework 3 22:07:35.273 [main] DEBUG io.netty.channel.MultithreadEventLoopGroup - -Dio.netty.eventLoopThreads: 8 4 22:07:35.329 [main] DEBUG io.netty.channel.nio.NioEventLoop - -Dio.netty.noKeySetOptimization: false 5 22:07:35.329 [main] DEBUG io.netty.channel.nio.NioEventLoop - -Dio.netty.selectorAutoRebuildThreshold: 512 6 22:07:35.387 [main] DEBUG io.netty.util.internal.PlatformDependent - Platform: Windows 7 22:07:35.390 [main] DEBUG io.netty.util.internal.PlatformDependent0 - -Dio.netty.noUnsafe: false 8 22:07:35.390 [main] DEBUG io.netty.util.internal.PlatformDependent0 - Java version: 8 9 22:07:35.393 [main] DEBUG io.netty.util.internal.PlatformDependent0 - sun.misc.Unsafe.theUnsafe: available 10 22:07:35.394 [main] DEBUG io.netty.util.internal.PlatformDependent0 - sun.misc.Unsafe.copyMemory: available 11 22:07:35.395 [main] DEBUG io.netty.util.internal.PlatformDependent0 - java.nio.Buffer.address: available 12 22:07:35.396 [main] DEBUG io.netty.util.internal.PlatformDependent0 - direct buffer constructor: available 13 22:07:35.397 [main] DEBUG io.netty.util.internal.PlatformDependent0 - java.nio.Bits.unaligned: available, true 14 22:07:35.397 [main] DEBUG io.netty.util.internal.PlatformDependent0 - jdk.internal.misc.Unsafe.allocateUninitializedArray(int): unavailable prior to Java9 15 22:07:35.397 [main] DEBUG io.netty.util.internal.PlatformDependent0 - java.nio.DirectByteBuffer.<init>(long, int): available 16 22:07:35.397 [main] DEBUG io.netty.util.internal.PlatformDependent - sun.misc.Unsafe: available 17 22:07:35.398 [main] DEBUG io.netty.util.internal.PlatformDependent - -Dio.netty.tmpdir: C:UserslitanAppDataLocalTemp (java.io.tmpdir) 18 22:07:35.398 [main] DEBUG io.netty.util.internal.PlatformDependent - -Dio.netty.bitMode: 64 (sun.arch.data.model) 19 22:07:35.400 [main] DEBUG io.netty.util.internal.PlatformDependent - -Dio.netty.noPreferDirect: false 20 22:07:35.400 [main] DEBUG io.netty.util.internal.PlatformDependent - -Dio.netty.maxDirectMemory: 1890582528 bytes 21 22:07:35.400 [main] DEBUG io.netty.util.internal.PlatformDependent - -Dio.netty.uninitializedArrayAllocationThreshold: -1 22 22:07:35.401 [main] DEBUG io.netty.util.internal.CleanerJava6 - java.nio.ByteBuffer.cleaner(): available 23 22:07:35.420 [main] DEBUG io.netty.util.internal.PlatformDependent - org.jctools-core.MpscChunkedArrayQueue: available 24 22:07:36.030 [main] DEBUG io.netty.channel.DefaultChannelId - -Dio.netty.processId: 18472 (auto-detected) 25 22:07:36.032 [main] DEBUG io.netty.util.NetUtil - -Djava.net.preferIPv4Stack: false 26 22:07:36.033 [main] DEBUG io.netty.util.NetUtil - -Djava.net.preferIPv6Addresses: false 27 22:07:36.324 [main] DEBUG io.netty.util.NetUtil - Loopback interface: lo (Software Loopback Interface 1, 127.0.0.1) 28 22:07:36.325 [main] DEBUG io.netty.util.NetUtil - Failed to get SOMAXCONN from sysctl and file procsys etcoresomaxconn. Default: 200 29 22:07:36.895 [main] DEBUG io.netty.channel.DefaultChannelId - -Dio.netty.machineId: 00:50:56:ff:fe:c0:00:01 (auto-detected) 30 22:07:36.905 [main] DEBUG io.netty.util.internal.InternalThreadLocalMap - -Dio.netty.threadLocalMap.stringBuilder.initialSize: 1024 31 22:07:36.905 [main] DEBUG io.netty.util.internal.InternalThreadLocalMap - -Dio.netty.threadLocalMap.stringBuilder.maxSize: 4096 32 22:07:36.938 [main] DEBUG io.netty.util.ResourceLeakDetector - -Dio.netty.leakDetection.level: simple 33 22:07:36.938 [main] DEBUG io.netty.util.ResourceLeakDetector - -Dio.netty.leakDetection.targetRecords: 4 34 22:07:36.992 [main] DEBUG io.netty.buffer.PooledByteBufAllocator - -Dio.netty.allocator.numHeapArenas: 8 35 22:07:36.992 [main] DEBUG io.netty.buffer.PooledByteBufAllocator - -Dio.netty.allocator.numDirectArenas: 8 36 22:07:36.992 [main] DEBUG io.netty.buffer.PooledByteBufAllocator - -Dio.netty.allocator.pageSize: 8192 37 22:07:36.992 [main] DEBUG io.netty.buffer.PooledByteBufAllocator - -Dio.netty.allocator.maxOrder: 11 38 22:07:36.992 [main] DEBUG io.netty.buffer.PooledByteBufAllocator - -Dio.netty.allocator.chunkSize: 16777216 39 22:07:36.992 [main] DEBUG io.netty.buffer.PooledByteBufAllocator - -Dio.netty.allocator.tinyCacheSize: 512 40 22:07:36.992 [main] DEBUG io.netty.buffer.PooledByteBufAllocator - -Dio.netty.allocator.smallCacheSize: 256 41 22:07:36.992 [main] DEBUG io.netty.buffer.PooledByteBufAllocator - -Dio.netty.allocator.normalCacheSize: 64 42 22:07:36.992 [main] DEBUG io.netty.buffer.PooledByteBufAllocator - -Dio.netty.allocator.maxCachedBufferCapacity: 32768 43 22:07:36.992 [main] DEBUG io.netty.buffer.PooledByteBufAllocator - -Dio.netty.allocator.cacheTrimInterval: 8192 44 22:07:36.992 [main] DEBUG io.netty.buffer.PooledByteBufAllocator - -Dio.netty.allocator.useCacheForAllThreads: true 45 22:07:37.029 [main] DEBUG io.netty.buffer.ByteBufUtil - -Dio.netty.allocator.type: pooled 46 22:07:37.029 [main] DEBUG io.netty.buffer.ByteBufUtil - -Dio.netty.threadLocalDirectBufferSize: 0 47 22:07:37.029 [main] DEBUG io.netty.buffer.ByteBufUtil - -Dio.netty.maxThreadLocalCharBufferSize: 16384 48 22:07:37.080 [nioEventLoopGroup-2-1] DEBUG io.netty.buffer.AbstractByteBuf - -Dio.netty.buffer.bytebuf.checkAccessible: true 49 22:07:37.084 [nioEventLoopGroup-2-1] DEBUG io.netty.util.ResourceLeakDetectorFactory - Loaded default ResourceLeakDetector: io.netty.util.ResourceLeakDetector@75655d17 50 22:07:37.126 [nioEventLoopGroup-2-1] DEBUG io.netty.util.Recycler - -Dio.netty.recycler.maxCapacityPerThread: 4096 51 22:07:37.126 [nioEventLoopGroup-2-1] DEBUG io.netty.util.Recycler - -Dio.netty.recycler.maxSharedCapacityFactor: 2 52 22:07:37.126 [nioEventLoopGroup-2-1] DEBUG io.netty.util.Recycler - -Dio.netty.recycler.linkCapacity: 16 53 22:07:37.126 [nioEventLoopGroup-2-1] DEBUG io.netty.util.Recycler - -Dio.netty.recycler.ratio: 8 54 Now isMon Jul 16 22:07:37 CST 2018
上面客户端最后一行是收到的服务端的应答，此时的服务端也出现了收到消息的语句，最后部分代码如下（重点是最后一行的请求消息）：
1 22:06:38.159 [main] DEBUG io.netty.buffer.ByteBufUtil - -Dio.netty.maxThreadLocalCharBufferSize: 16384 2 22:07:37.160 [nioEventLoopGroup-3-1] DEBUG io.netty.util.Recycler - -Dio.netty.recycler.maxCapacityPerThread: 4096 3 22:07:37.160 [nioEventLoopGroup-3-1] DEBUG io.netty.util.Recycler - -Dio.netty.recycler.maxSharedCapacityFactor: 2 4 22:07:37.160 [nioEventLoopGroup-3-1] DEBUG io.netty.util.Recycler - -Dio.netty.recycler.linkCapacity: 16 5 22:07:37.160 [nioEventLoopGroup-3-1] DEBUG io.netty.util.Recycler - -Dio.netty.recycler.ratio: 8 6 22:07:37.176 [nioEventLoopGroup-3-1] DEBUG io.netty.buffer.AbstractByteBuf - -Dio.netty.buffer.bytebuf.checkAccessible: true 7 22:07:37.179 [nioEventLoopGroup-3-1] DEBUG io.netty.util.ResourceLeakDetectorFactory - Loaded default ResourceLeakDetector: io.netty.util.ResourceLeakDetector@164ea267 8 The time server receive order:QUERY TIME ORDER
运行OK！