org.apache.jasper.JasperException: Unable to compile class for JSP: An error occurred at line: 23 in the generated java file The method getJspApplicationContext(ServletContext) is undefined for the type JspFactory Stacktrace: org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:92) org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:330) org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:439) org.apache.jasper.compiler.Compiler.compile(Compiler.java:356) org.apache.jasper.compiler.Compiler.compile(Compiler.java:334) org.apache.jasper.compiler.Compiler.compile(Compiler.java:321) org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:592) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:328) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260) javax.servlet.http.HttpServlet.service(HttpServlet.java:717) com.cienet.framework.popedom.web.filter.RequestFilter.doFilter(RequestFilter.java:46)
原因：
应用中添加的servlet-jsp.jar包(一般为myclipse添加）与tomcat的servlet-jsp.jar包冲突。这个包中主要为jsp引擎相关class。
解决：
将应用中servlet-jsp.jar删除