Description Resource Path Location Type The superclass "javax.servlet.http.HttpServlet" was not found on the Java Build Path demo2.jsp /poiDemo1/WebContent line 1 JSP Problem
报错的原因是:项目所在的编辑器,如eclipse,没有配置相应的jar包;
解决方式为,配置tomcat的jar包,即有关httpservlet的jar包。
若不导入jar包,就配置下,下面是别的博客的链接:
https://blog.youkuaiyun.com/testcs_dn/article/details/36455669