java.lang.ClassCastException-org.apache.jasper.Jas-优快云博客

本文记录了一次解决HTTP状态码500错误的过程，详细分析了错误原因，并给出了具体的解决方案。错误源于系统中存在两个版本的UserInfo BEAN导致的冲突。

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HTTP Status 500 -

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type Exception report

message

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

exception

org.apache.jasper.JasperException: www.my.model.UserInfo
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:510)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:393)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
www.my.filter.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:122)

root cause

java.lang.ClassCastException: www.my.model.UserInfo
www.my.web.gerRel.getResultList(gerRel.java:66)
org.apache.jsp.web.gets.gerRel_jsp._jspService(org.apache.jsp.web.gets.gerRel_jsp:114)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:332)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
www.my.filter.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:122)

note The full stack trace of the root cause is available in the Apache Tomcat/5.5.15 logs.

找了好久的错误，后来发现系统中有两个版本的UserInfo，是这个BEAN在系统中造成冲突的原因。知道原因了就很好解决了啊！呵呵，