The type javax.servlet.http.HttpServletRequest cannot be resolved. It is indirectly referenced from required .class files. 这个错误表示的意思还不太清楚，
解决办法：/WebRoot/WEB-INF/lib导入 servelet-api.jar
The type javax.servlet.http.HttpServletRequest cannot be resolved. It is indirectly referenced from required .class files. 这个错误表示的意思还不太清楚，
解决办法：/WebRoot/WEB-INF/lib导入 servelet-api.jar