Jsp页面报错The superclass "javax.servlet.http.HttpServlet" was not found on the Java

Eclipse创建jsp后报错
Multiple annotations found at this line:
- The superclass “javax.servlet.http.HttpServlet” was not found on the Java
Build Path
- The superclass “javax.servlet.http.HttpServlet” was not found on the Java
Build Path

是因为缺少servlet-api.jar
右击项目文件，选择Build Path–>Configure Build Path…–>Libraries
如果没有Apache Tomcat，就点击Add Library–>Server Runtime–>Next–>选择Apache–>Finish，刷新项目看看错误是否消失。
如果有Apache Tomcat就点击Add Library…–>User Library–>Next–>User Libraries–>New…–>名字随便写–>ok–>Add External JARs…–>找到你Apache安装路径下的lib目录，选择servlet-api.jar–打开–>ok–>Finish–>ok，
好了，问题解决

转载自：http://blog.youkuaiyun.com/wu_wxc/article/details/51836297