这边用的maven的jar包是 ~~~ <!-- https://mvnrepository.com/artifact/io.netty/netty-all --> <dependency> <groupId>io.netty</groupId> <artifactId>netty-all</artifactId> <!--<version>5.0.0.Alpha1</version>--> <version>4.1.6.Final</version> </dependency> ~~~