java.lang.ClassNotFoundException: org.apache.jsp.index_jsp

一、出现的问题

在使用IntelliJ IDEA 运行JSP页面时报以下错误：

HTTP Status 500 - java.lang.ClassNotFoundException: org.apache.jsp.index_jsp

type Exception report

message java.lang.ClassNotFoundException: org.apache.jsp.index_jsp

description The server encountered an internal error that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException: java.lang.ClassNotFoundException: org.apache.jsp.index_jsp
	org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:177)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:376)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:395)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:339)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
root cause

java.lang.ClassNotFoundException: org.apache.jsp.index_jsp
	java.net.URLClassLoader$1.run(URLClassLoader.java:366)
	java.net.URLClassLoader$1.run(URLClassLoader.java:355)
	java.security.AccessController.doPrivileged(Native Method)
	java.net.URLClassLoader.findClass(URLClassLoader.java:354)
	org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:132)
	org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:63)
	org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:172)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:376)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:395)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:339)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
note The full stack trace of the root cause is available in the Apache Tomcat/7.0.67 logs.

Apache Tomcat/7.0.67

二、问题原因

出现此问题的原因在于我们在jsp页面中使用了jstl标签，但是没有引入jstl相关的jar包。

<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>

三、解决办法

引入jstl.jar和standard.jar即可解决。jar包下载链接：
https://yunpan.cn/cRQS5UZKg5RNU （提取码：b33a）