jsp页面出现错误：
Multiple annotations found at this line:
- The superclass "javax.servlet.http.HttpServlet" was not found on the Java
Build Path
解决方案：
1.右键项目 build path
2.选择 configure build path
3.切换至 libraries 选项卡
4.点击 add external jars
5.找到tomcat安装路径（我的是C:\Program Files\Apache Software Foundation\Tomcat 9.0\）lib文件夹下
的servlet-api.jar，添加
6.确定 -> 完成
原文：https://blog.csdn.net/qq_26954773/article/details/53561092
Multiple annotations found at this line: - The superclass "javax.servlet.http.HttpServlet" was not
原文：https://www.cnblogs.com/hawk-li/p/10944987.html