Eclipse匯入新工程錯誤-The project was not built since its build path is incomplete.

Eclipse匯入新工程錯誤如下： --Description Resource Path Location Type：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 project iplat  Unknown Java Problem --Description Resource Path Location Type：The type javax.servlet.http.HttpServletRequest cannot be resolved. It is indirectly referenced from required .class files CompressionFilter.java /iplat/src/com/ken/finance/gzip line 1 Java Problem 修複：Eclipse增加Http伺服器Tomcat