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Re: using generic collections in a JSP page (tomcat 5.5 OS X 10.4.2)

Title: Re: using generic collections in a JSP page (tomcat 5.5 OS X 10.4.2)
I tried on my setup (Tomcat 5.5.9 on Tiger) and I get the same. Quick Google threw up this page:

http://blog.taragana.com/index.php/archive/how-to-run-javac-15-or-beyond-compiler-for-jsp-compilation-in-tomcat-55-with-generics-enabled-and-other-15-only-features/

I’ve not had a chance to try it (scared of breaking my own config at the moment), but I can’t see any reason why that solution wouldn’t work.

Cheers

Alan


On 27/7/05 04:36, "Jonathan Cowperthwaite" <email@hidden> wrote:

Hi All,

 I cannot get my JSP page to run in Tomcat 5.5

I'm reasonably confident that i've isolated the problem to use of Generics, a new Java 5 feature, within java code embedded in the JSP page.

Although I have java 1.5 installed I'm assuming that Jasper, which compiles the JSP pages for tomcat is somehow using javac from 1.4 rather than 1.5.

Has anyone else had this problem?

I'm hoping the solution is as simple as making an adjustment to the configuration of Tomcat.


some further details

This works
    
    <%
        LinkedList list = new LinkedList();
        //do something
    %>

This doesn't

    <%
        LinkedList<String> list = new LinkedList<String>();
        //do something
    %>

Requesting the JSP page from Tomcat gives the following error:

Jul 27, 2005 3:32:55 PM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet jsp threw exception
org.apache.jasper.JasperException: Unable to compile class for JSP

An error occurred at line: 78 in the jsp file: /index.jsp
Generated servlet error:
Syntax error on token "<", invalid AssignmentOperator

An error occurred at line: 78 in the jsp file: /index.jsp
Generated servlet error:
Syntax error on token "=", != expected

An error occurred at line: 78 in the jsp file: /index.jsp
Generated servlet error:
Syntax error on token "<", ( expected

An error occurred at line: 78 in the jsp file: /index.jsp
Generated servlet error:
Syntax error on token "(", invalid _expression_


    at org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:84)
    at org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:328)
    at org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:397)
    at org.apache.jasper.compiler.Compiler.compile(Compiler.java:288)
    at org.apache.jasper.compiler.Compiler.compile(Compiler.java:267)
    at org.apache.jasper.compiler.Compiler.compile(Compiler.java:255)
    at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:556)
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:293)
    at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:291)
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856)
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:744)
    at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
    at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
    at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
    at java.lang.Thread.run(Thread.java:613)



many thanks in advance
Jonathan

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References: 
 >using generic collections in a JSP page (tomcat 5.5 OS X 10.4.2) (From: Jonathan Cowperthwaite <email@hidden>)



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