The superclass “javax.servlet.http.HttpServlet“ was not found on the Java Build Path
项目场景：
jsp文件报错 错误为The superclass “javax.servlet.http.HttpServlet” was not found on the Java Build Path
此处遇到的原因是因为将tomcat8.5版本换为了10.0 所以就需要重新配置
而且我重新配置后还是出现了第二排报错 还是同样的The superclass “javax.servlet.http.HttpServlet” was not found on the Java Build Path
这个是软件的问题 重启启动后恢复正常 报错消失
问题描述
The superclass “javax.servlet.http.HttpServlet” was not found on the Java Build Path
<%@。。。%>表示是指令，主要用来提供整个JSP 网页相关的信息，并且用来设定JSP网页的相关属性
<%@ page language="java" contentType="text/html; charset=UTF-8"pageEncoding="UTF-8"%>
原因分析：
The superclass “javax.servlet.http.HttpServlet” was not found on the Java Build Path
解决方案：
1.首先右键项目包 找到Build Path里面的Configure Build Path 点击打开
2.点击Add Library 找到里面的Server Runtime 之后点击下一步
3.找到下载好的tomcat 点击finish完成
注意：有的可能会出现改完还是有报错的情况 可以重启一下试试 也许报错就已经解决了！！！
tomcat的配置
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