基于Springboot和Netty实现自定义协议开发教程

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Netty学习笔记_Springboot实现自定义协议 Netty是一个基于Java的异步事件驱动的网络编程框架,它提供了一个简单的方式来开发高性能的网络应用程序。在Spring Boot项目中,Netty可以用于实现自定义协议的服务端和客户端程序。 在Spring Boot项目中,添加Netty依赖需要在pom.xml文件中添加以下依赖项: ``` <dependency> <groupId>io.netty</groupId> <artifactId>netty-all</artifactId> <version>4.1.31.Final</version> </dependency> ``` 在添加Netty依赖项后,需要排除Tomcat依赖项,以免与Netty冲突: ``` <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> <exclusions> <exclusion> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-tomcat</artifactId> </exclusion> </exclusions> </dependency> ``` 在实现自定义协议时,需要定义一个协议类,例如PersonProtocal类: ``` public class PersonProtocal { private int length; private byte[] content; public int getLength() { return length; } public void setLength(int length) { this.length = length; } public byte[] getContent() { return content; } public void setContent(byte[] content) { this.content = content; } } ``` 在定义了协议类后,需要编写一个编码器类,例如MyPersonEncoder类,以便将协议类转换为字节流: ``` public class MyPersonEncoder extends MessageToByteEncoder<PersonProtocal> { @Override protected void encode(ChannelHandlerContext ctx, PersonProtocal msg, ByteBuf out) throws Exception { // 编码逻辑 } } ``` 在实现了编码器类后,需要在Netty的ChannelPipeline中添加该编码器,以便在发送数据时将协议类转换为字节流。 在Netty中,ChannelPipeline是处理数据的链式结构,每个处理器(Handler)都可以对数据进行处理。在添加编码器时,需要将其添加到ChannelPipeline中,以便在发送数据时将协议类转换为字节流。 Netty是一个功能强大且灵活的网络编程框架,通过实现自定义协议,可以满足特定的业务需求。在Spring Boot项目中,使用Netty可以实现高性能的网络应用程序。 相关知识点: * Netty框架 * Spring Boot项目 * 自定义协议 * Netty依赖项 * Tomcat依赖项 * 协议类 * 编码器类 * ChannelPipeline * Handler 资源链接: * Netty官方文档:https://netty.io/ * Spring Boot官方文档:https://spring.io/projects/spring-boot * Netty中文文档:https://netty.io/wiki/user-guide.html

2023-07-13 09:15:56,872 WARN org.apache.flink.runtime.dispatcher.DispatcherRestEndpoint [] - Unhandled exception java.io.IOException: Connection reset by peer at sun.nio.ch.FileDispatcherImpl.read0(Native Method) ~[?:1.8.0_372] at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:39) ~[?:1.8.0_372] at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:223) ~[?:1.8.0_372] at sun.nio.ch.IOUtil.read(IOUtil.java:192) ~[?:1.8.0_372] at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:379) ~[?:1.8.0_372] at org.apache.flink.shaded.netty4.io.netty.buffer.PooledByteBuf.setBytes(PooledByteBuf.java:253) ~[flink-dist-1.15.3.jar:1.15.3] at org.apache.flink.shaded.netty4.io.netty.buffer.AbstractByteBuf.writeBytes(AbstractByteBuf.java:1132) ~[flink-dist-1.15.3.jar:1.15.3] at org.apache.flink.shaded.netty4.io.netty.channel.socket.nio.NioSocketChannel.doReadBytes(NioSocketChannel.java:350) ~[flink-dist-1.15.3.jar:1.15.3] at org.apache.flink.shaded.netty4.io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:151) [flink-dist-1.15.3.jar:1.15.3] at org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:719) [flink-dist-1.15.3.jar:1.15.3] at org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:655) [flink-dist-1.15.3.jar:1.15.3] at org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:581) [flink-dist-1.15.3.jar:1.15.3] at org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:493) [flink-dist-1.15.3.jar:1.15.3] at org.apache.flink.shaded.netty4.io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:986) [flink-dist-1.15.3.jar:1.15.3] at org.apache.flink.shaded.netty4.io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) [flink-dist-1.15.3.jar:1.15.3] at java.lang.Thread.run(Thread.java:750) [?:1.8.0_372]

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