解决部署报错No main manifest attribute, in XXX.jar

将build中的入口改为如下即可解决：

 <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>

注意：

execution中内容很重要