4.0.0 com.shuhe commons pom 1.0-SNAPSHOT netty-mqtt common 1.8 UTF-8 UTF-8 4.1.49.Final 28.2-jre 1.16.18 1.7.7 1.1.7 LATEST 1.2.0 2.2.0 3.4 1.1.7 org.apache.maven.plugins maven-compiler-plugin 3.1 ${java.version} ${java.version} central aliyun maven http://maven.aliyun.com/nexus/content/groups/public/ default true false