BUG背景：
今天在构建一个maven父子工程，但是在使用mvn clean install -DskipTests打包命令之后，就出现了一个BUG
[ERROR] Failed to execute goal org.springframework.boot:spring-boot-maven-plugin:2.3.5.RELEASE:repackage (repackage) on project dubbo-spring-cloud-api: Execution repackage of goal org.springframework.boot:spring-boot-maven-plugin:2.3.5.RELEASE:repackage failed: Unable to find main class -> [Help 1]
看bug的提示信息中意思是：没有找到主方法类
