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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:

1. <dependency> 
2.    <groupId>javax.servlet</groupId> 
3.    <artifactId>servlet-api</artifactId> 
4.    <version>2.5</version> 
5.    <scope>provided</scope> 
6. </dependency> 

Maven项目下HttpServletRequest 或 HttpServletResponse需引用的依赖包