springmvc maven项目不识别HttpServletRequest

Maven项目下HttpServletRequest 或 HttpServletResponse需引用的依赖包:servlet-api.jar，并将scope设置为provided。

pom.xml:

<dependency>
   <groupId>javax.servlet</groupId>
   <artifactId>servlet-api</artifactId>
   <version>2.5</version>
   <scope>provided</scope>
</dependency>