Spring Boot工程中如果有多个main()函数，需要指定启动类

Xml代码

<properties>  

    <!-- The main class to start by executing java -jar -->  

    <start-class>com.rensanning.springboot.SpringBootDemoApplication</start-class>  

</properties> 
或者

<build>  

    <plugins>  

        <plugin>  

            <groupId>org.springframework.boot</groupId>  

            <artifactId>spring-boot-maven-plugin</artifactId>  

            <configuration>  

                <mainClass>com.rensanning.springboot.SpringBootDemoApplication</mainClass>  

            </configuration>  

        </plugin>  

    </plugins>  

</build>