当我从Eclipse运行我的应用程序时,它运行时没有任何错误的servlet api 3.1.0和3.0.1.

    javax.servlet
    javax.servlet-api
    3.1.0

我使用tomcat 8.0.21进行eclipse.我在ubuntu机器上设置了tomcat8,它运行在tomcat 8.0.14稳定版本上.

不幸的是,如果我使用servlet api 3.1.0,我会收到以下错误消息.但它适用于旧版本3.0.1.

root cause

org.apache.jasper.JasperException: Unable to compile class for JSP: 

An error occurred at line: [50] in the generated java file: [/var/lib/tomcat8/work/Catalina/localhost/ROOT/org/apache/jsp/WEB_002dINF/view/templates/login_002dtemplate_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)

为什么我会收到此错误？如何解决这个问题？