18장 hearder.tag 태그 파일 사용하여 출력하는 예제를 해 보는데요...
다음과 같은 에러가 발생하는데 왜 그런지 ...
HTTP Status 500 - An exception occurred processing JSP page /use_header.jsp at line 8
type Exception report
message An exception occurred processing JSP page /use_header.jsp at line 8
description The server encountered an internal error that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: An exception occurred processing JSP page /use_header.jsp at line 8
5: <head><title>제목 출력</title></head>
6: <body>
7:
8: <tf:header title="'텍스트 제목'" level="2"/>
9:
10: <tf:header title="${'EL 제목'}" level="3"/>
11:
Stacktrace:
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:568)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:455)
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:728)
root cause
javax.servlet.ServletException: javax.servlet.jsp.JspException: java.lang.ClassCastException: org.apache.jasper.el.ELContextImpl cannot be cast to org.apache.jasper.el.ELContextImpl org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:908) org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:841) org.apache.jsp.use_005fheader_jsp._jspService(use_005fheader_jsp.java:101) org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) javax.servlet.http.HttpServlet.service(HttpServlet.java:728) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432) 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:728)
root cause
java.lang.ClassCastException: org.apache.jasper.el.ELContextImpl cannot be cast to org.apache.jasper.el.ELContextImpl org.apache.jasper.runtime.PageContextImpl.proprietaryEvaluate(PageContextImpl.java:1023) org.apache.jsp.tag.webheader_tag.doTag(webheader_tag.java:108) org.apache.jsp.use_005fheader_jsp._jspx_meth_tf_005fheader_005f0(use_005fheader_jsp.java:121) org.apache.jsp.use_005fheader_jsp._jspService(use_005fheader_jsp.java:74) org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) javax.servlet.http.HttpServlet.service(HttpServlet.java:728) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432) 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:728)
note The full stack trace of the root cause is available in the Apache Tomcat/7.0.39 logs.
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