The method getJspApplicationContext(ServletContext) is undefined for the type JspFactory问题查找及解决

公司内部有一个项目,使用的git管理的版本,过了一段时间没有取代码,重新取代码后就报以下错误:

org.apache.jasper.JasperException: Unable to compileclass for JSP:

An error occurred at line: [31] in the generated javafile:[D:\developeProject\m\env\apache-tomcat-7.0.54\work\org\apache\jsp\index_jsp.java]

The method getJspApplicationContext(ServletContext) isundefined for the type JspFactory

Stacktrace: org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:103)

org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:366)

org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:476)

org.apache.jasper.compiler.Compiler.compile(Compiler.java:378)

org.apache.jasper.compiler.Compiler.compile(Compiler.java:353)

org.apache.jasper.compiler.Compiler.compile(Compiler.java:340)

org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:657)

org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:357)

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:727)

org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

com.alibaba.druid.support.http.WebStatFilter.doFilter(WebStatFilter.java:123)

note The full stack trace of theroot cause is available in the Apache Tomcat/7.0.54 logs.

从报错提醒和网上搜索结果看,都说是jar冲突了,但对比了一下jar包,没有发现名称有重复的.着实纠结了二个小时.

看来不能用简单的包名方式找问题,需要从java的jar包调用机制上来查找问题了.报错的位置是jsp生成的java代码上,明确地指出是jspFactory不明确,要不是少了这个类,要不是多个类重复了.直接在项目随便那个java文件中,打一个JspFactory jf=new JspFactoryImpl(); 看它能够调用的哪个包中的jspFactory类就可以了.

这个包一般需要调用jsp-api.jar包中的类.我的是openfire.jar中也带了整个javax.servlet.jsp包. 直接把这个openfire.jar包中的javax.servlet.jsp全删除就可以了.