DescriptionResourcePathLocationType The project was not built since its build path is incomplete. Cannot find the class file for javax.servlet.http.HttpServletRequest. Fix the build path then try building this projectdatacenterUnknownJava Problem

=============================

解決方法：

1：是未匯入tomcat，引入tomcat解決

2：上網查了下，說是servlet包沒有匯入的問題，我找到C:/Tomcat 5.5/common/lib下，將servlet-api.jar這個jar包引進，問題解決。