报错
Could not transfer artifact org.xolstice.maven.plugins:protobuf-maven-plugin:jar:0.5.0 from/to central (https://repo.maven.apache.org/maven2): GET request of: org/xolstice/maven/plugins/protobuf-maven-plugin/0.5.0/protobuf-maven-plugin-0.5.0.jar from central failed
是部分jar包没有下载下来，在本地仓库删除重新下载就行
