Unable to compile class for JSP

Question

I am working in a JSP project  While runnning the project using Netbeans with Tomcat 6 server  I got the following exception   org apache jasper JasperException  Unable to compile class for JSP    An error occurred at line  8 in the generated java file Only a type can be imported   com TransportPortal MyFunctions resolves to a package  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 349      org apache jasper compiler Compiler compile Compiler java 327      org apache jasper compiler Compiler compile Compiler java 314      org apache jasper JspCompilationContext compile JspCompilationContext java 589      org apache jasper servlet JspServletWrapper service JspServletWrapper java 317      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      org netbeans modules web monitor server MonitorFilter doFilter MonitorFilter java 393    It has servelet-api jar in Apache Tomcat s lib directory   Please help me to resolve it

User · Answer

Either you can Downgrade to JRE 1 7 49  or if you want to run on JRE 8  Step to fix -   Go to Lib folder of Liferay Tomcat    Replace  - ecj-3 7 2 jar with ecj-4 4 2   Restart the Server

User · Answer

I faced same exception in eclipse neon version exception is like below  org apache jasper JasperException  Unable to compile class for JSP    An error occurred at line  1 in the generated java file The type java io ObjectInputStream cannot be resolved  It is indirectly referenced from required  class files  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 349      org apache jasper compiler Compiler compile Compiler java 327      org apache jasper compiler Compiler compile Compiler java 314      org apache jasper JspCompilationContext compile JspCompilationContext java 592      org apache jasper servlet JspServletWrapper service JspServletWrapper java 317      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    I using Apache tomcat 8 of maven plugin and i tried to update that but face same issue   After i download new external apache tomcat version 8 5 14 and run project using this its will success for me  I hope some one to useful this for resolve above exception

User · Answer

org apache jasper JasperException  Unable to compile class for JSP

User · Answer

In my case  I was using the 6 0 24 Tomcat version  with JDK 1 8  and resolved the problem by upgrading to the 6 0 37 version  Also  if you install the new tomcat version in a different folder  do not forget to copy your previous version  conf folder to the new installation folder

User · Answer

From the error it seems that you are trying to import something which is not a class   If your MyFunctions is a class  you should import it like this    lt   page import  com TransportPortal MyFunctions   gt    If it is a package and you want to import everything in the package you should do like this    lt   page import  com TransportPortal MyFunctions      gt    Edit   There are two cases which will give you this error  edited to cover both

User · Answer

lt pluginManagement gt           lt plugins gt               lt plugin gt                   lt groupId gt org apache tomcat maven lt  groupId gt                   lt artifactId gt tomcat7-maven-plugin lt  artifactId gt                          lt version gt 2 2 lt  version gt               lt  plugin gt           lt  plugins gt

User · Answer

It may be related to Java JRE version   In my case I need Tomcat 6 0 26 which presented same error with JRE 1 8 0 91  A downgrade to JRE 1 7 49 solved it   You might find more information in  http   www howopensource com 2015 07 unable-to-compile-class-for-jsp-the-type-java-util-mapentry-cannot-be-resolved

User · Answer

Try adding this to your web xml    lt context-param gt       lt param-name gt contextConfigLocation lt  param-name gt       lt param-value gt           WEB-INF your-servlet-name xml      lt  param-value gt

[jsp] Unable to compile class for JSP

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