javax.servlet.jsp.PageContext cannot be resolved

下载shopxx后开始build工作，出现：

The project was not built since its build path is incomplete. Cannot find the class file forjavax.servlet.jsp.PageContext. Fix the build path then try building this project 
The type javax.servlet.jsp.PageContext cannot be resolved. It is indirectly referenced from required .class
 files 的错误。

把servlet-api.jar和jsp-api.jar包加入libraries中即可。

转自：http://blog.chinaunix.net/uid-20681545-id-3412158.html