~~~ <!-- 引入springboot技术 --> <!--在依赖之外--> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.3.1.RELEASE</version> </parent> ~~~ springmvc技术 ~~~ <dependencies> <!-- 引入springMVC相关依赖(配置) --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> </dependencies> ~~~