java Cannot find the class file for javax.servlet.http.HttpServletRequest.错误解决

转自：https://zhidao.baidu.com/question/1732545056139419947.html

错误提示是没有引入javax.servlet.http.HttpServletRequest所在的包，编译错误。

这么添加：

项目-->右键-->properties-->java build bath-->Libraries

这里要保有这两个包。

如果你的没有，那么：add Library-->user Library-->user Libraties-->new-->名字-->选中-->add External Libraries-->找到你的Tomcat目录\lib，里面选中这两个包.

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