common modules

Failed to execute goal org.springframework.boot:spring-boot-maven-plugin:2.1.8.RELEASE:repackage (repackage) on project online-common: Execution repackage of goal org.springframework.boot:spring-boot-maven-plugin:2.1.8.RELEASE:repackage failed: Unable to find a single main class from the following candidates [com.example.onlinecommon.valatiledemo.Main, com.example.onlinecommon.valatiledemo.MainDemo, com.example.onlinecommon.valatiledemo.MyRunnable]

According to the above tips, I deleted the main method in classes main, maindemo and myrunnable
2. Continue packing

Failed to execute goal org.springframework.boot:spring-boot-maven-plugin:2.1.8.RELEASE:repackage (repackage) on project online-common: Execution repackage of goal org.springframework.boot:spring-boot-maven-plugin:2.1.8.RELEASE:repackage failed: Unable to find main class

The above tip: my common module lacks the main class, because this is my tool module, so there is no need to start the class. I changed the package file to

 <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <skip>true</skip>
                </configuration>
            </plugin>
        </plugins>
    </build>

Skip the packaging of this module