Transactional cannot be resolved to a type

SpringBoot整合Mybatis时遇到“ Transactional cannot be resolved to a type ” ，以为是没有导入相应的包 “ import org.springframework.transaction.annotation.Transactional; ” ，导入发现还是报错，在Stack Overflow上找到解决办法。在pom.xml中加入

<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-tx</artifactId>
    <version>4.2.6.RELEASE</version>
</dependency>