1. Description
When springboot is packaging, you must configure the packaging plug-in, as shown below:
Packaged into a jar package, you need to add maven dependency
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId >spring-boot-maven-plugin< /artifactId>
</plugin>
</ plugins>
</build>
If you do not add related dependencies, execute maven packaging, and you will get an error after running: no main manifest attribute, in XXX.ja