<build>
		<plugins>
			<!--<plugin>-->
				<!--<groupId>org.springframework.boot</groupId>-->
				<!--<artifactId>spring-boot-maven-plugin</artifactId>-->
			<!--</plugin>-->

            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.1</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
		</plugins>
	</build>
 

mvn clean install