The type javax.servlet.http.HttpServletRequest cannot be resolved. It is indirectly referenced fro

今天将一个web项目导入Eclipse的时候，项目报错如下：

The type javax.servlet.http.HttpServletRequest cannot be resolved. It is

indirectly referenced from required .class files

解决办法是：将tomcat的运行环境添加到项目中。

在项目上右键--build path---add libraries --server runtime