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HTTP Status 500 - Unable to compile class for JSP:
type Exception report
message Unable to compile class for JSP:
description The server encountered an internal error that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: Unable to compile class for JSP:
An error occurred at line: [43] in the generated java file: [D:\tomcat8.0\apache-tomcat-8.0.14\work\Catalina\localhost\test_project\org\apache\jsp\index_jsp.java]
The method getDispatcherType() is undefined for the type HttpServletRequest
Stacktrace:
org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:103)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:199)
org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:450)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:361)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:336)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:323)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:564)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:357)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340)
javax.servlet.http.HttpServlet.service(HttpServlet.java:725)
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/8.0.14 logs.
Apache Tomcat/8.0.14
访问不到主页index.jsp的原因是servlet-api.jar包有冲突，删除lib的servlet-api.jar，如果报错则添加Apache Tomcat下的 servlet-api.jar 即可。
访问不到主页index.jsp的原因是servlet-api.jar包有冲突，删除lib的servlet-api.jar，如果报错则添加Apache Tomcat下的 servlet-api.jar 即可。
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原文地址：http://www.cnblogs.com/yuzhoulangzi/p/5202945.html
