Jun 3, 2020

Exception analysis of jsp pages using jstl

1. Add jstl support in jsp page using the following code


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

2. If the jsp page reports the following exception

org.apache.jasper.JasperException: java.lang.ClassNotFoundException: org.apache.jsp.Customer.addCustomerInfo_jsp org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:177) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:369) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334) javax.servlet.http.HttpServlet.service(HttpServlet.java:722) org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:198) org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76) org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:96) org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)

root cause

java.lang.ClassNotFoundException: org.apache.jsp.Customer.addCustomerInfo_jsp java.net.URLClassLoader$1.run(URLClassLoader.java:200) java.security.AccessController.doPrivileged(Native Method) java.net.URLClassLoader.findClass(URLClassLoader.java:188) 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:369) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334) javax.servlet.http.HttpServlet.service(HttpServlet.java:722) org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:198) org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76) org.springfr

amework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:96)

org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)

It is likely that your Tomcat lib directory does not have jstl’s jar package, so tomcat cannot parse jstl

Solution: Add jstl’s jar package to lib’s lib directory.

jstljar package Download Address: Download jstl