Spring Boot 项目编译时提示错误 cannot access WebApplicationInitializer 错误

Error:(21, 8) java: cannot access org.springframework.web.WebApplicationInitializer
  class file for org.springframework.web.WebApplicationInitializer not found

public class Application extends SpringBootServletInitializer{
}

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
    <version>2.2.6.RELEASE</version>
</dependency>