Docker报 no main manifest attribute, in xxx.jar

在 pom 文件的 build 标签加上 spring-boot-maven-plugin 插件即可。

<plugin>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-maven-plugin</artifactId>=
  <executions>
       <execution>
           <phase>package</phase>
           <goals>
               <goal>repackage</goal>
           </goals>
       </execution>
  </executions>
  <configuration>
     <includeSystemScope>true</includeSystemScope>
      <mainClass>com.xxx.xxx.xxx</mainClass>
  </configuration>
</plugin>