Jasper Reports “package net.sf.jasperreports.engine does not exist” exception in JDeveloper 11.1 using WebLogic only in EAR Web Page

问题

I'm using JDeveloper 11.1, Oracle 11 and TIBCO JasperReports 6.0.1.

I'm having problems trying to generate Jasper Reports from my web page (ViewController) while using an ApplicationModule (Model - EJB) for doing that. At the end the PDF file has to be sent via email, that's why I let it into the Model project.

If I execute the ApplicationModule, it works fine, no exceptions, the PDF is very well generated and sent.

However, if I execute the client method since a web page I got this exception :

net.sf.jasperreports.engine.JRException: Errors were encountered when compiling report expressions class file:
C:\Users\rodmar\AppData\Roaming\JDeveloper\system11.1.1.7.40.64.93\DefaultDomain\Simple_Blue_1429546047623_56582.java:4: package net.sf.jasperreports.engine does not exist
import net.sf.jasperreports.engine.*;
^
C:\Users\rodmar\AppData\Roaming\JDeveloper\system11.1.1.7.40.64.93\DefaultDomain\Simple_Blue_1429546047623_56582.java:5: package net.sf.jasperreports.engine.fill does not exist
import net.sf.jasperreports.engine.fill.*;
^
C:\Users\rodmar\AppData\Roaming\JDeveloper\system11.1.1.7.40.64.93\DefaultDomain\Simple_Blue_1429546047623_56582.java:18: cannot find symbol
symbol: class JREvaluator
public class Simple_Blue_1429546047623_56582 extends JREvaluator
                                                     ^
C:\Users\rodmar\AppData\Roaming\JDeveloper\system11.1.1.7.40.64.93\DefaultDomain\Simple_Blue_1429546047623_56582.java:25: cannot find symbol
symbol  : class JRFillParameter
location: class Simple_Blue_1429546047623_56582
    private JRFillParameter parameter_REPORT_LOCALE = null;
            ^
C:\Users\rodmar\AppData\Roaming\JDeveloper\system11.1.1.7.40.64.93\DefaultDomain\Simple_Blue_1429546047623_56582.java:26: cannot find symbol
symbol  : class JRFillParameter
location: class Simple_Blue_1429546047623_56582
    private JRFillParameter parameter_Description = null;
            ^
C:\Users\rodmar\AppData\Roaming\JDeveloper\system11.1.1.7.40.64.93\DefaultDomain\Simple_Blue_1429546047623_56582.java:27: cannot find symbol
symbol  : class JRFillParameter
location: class Simple_Blue_1429546047623_56582
    private JRFillParameter parameter_JASPER_REPORT = null;
            ^
C:\Users\rodmar\AppData\Roaming\JDeveloper\system11.1.1.7.40.64.93\DefaultDomain\Simple_Blue_1429546047623_56582.java:28: cannot find symbol
symbol  : class JRFillParameter
location: class Simple_Blue_1429546047623_56582
    private JRFillParameter parameter_REPORT_VIRTUALIZER = null;
            ^

I'm just pasting a fragment.

I'm using other .jars as POI, for reading .xlsx files and inserting then into database so I don't know why I can access POI without any problem but at the same time I don't have Jasper Reports available.

I have already searched some solutions in the web but nothing solves my problems. I get some information about jdt-compiler but I don't find it into JasperReports suite. My project is really a mess with all these libraries, maybe I'm missing or adding too many ?

My EAR project at the moment is like this :

The EAR\lib:

This is a kind of a problem for jars settings, or something like that. I had already found this page but it is really strange, I don't think that my issue is something so complicated.

http://docs.oracle.com/cd/E25178_01/fusionapps.1111/e15524/adv_wls_e.htm

EDIT 1 :

I tried to look to my classpath using this code :

ClassLoader cl = ClassLoader.getSystemClassLoader();
URL[] urls = ((URLClassLoader)cl).getURLs();
for (URL url: urls) {
    logger.info(String.format("Classpath: %s.", url.toString()));
}

And I get this output. POI is not here but why, I'm using it without any problems while I'm not been capable of using JasperReports ?

1 ) Is POI.jar by default used in WebLogic 10.3 basic installation ? NO

EDIT 2 :

I've discovered that in WebLogic is necessary to access weblogic.utils.classloaders.GenericClassLoader which sends me all the libraries that belong to this EAR application. Using it, Jasper Reports are available however I don't know what to do to access them successfully...

GenericClassLoader jre = (GenericClassLoader) JREvaluator.class.getClassLoader();
logger.info(String.format("jre: %s, s.", jre, jre.getClassPath()));

Thanks you very much,

回答1:

Well, as somebody says it was necessary to use jdt-compiler-3.1.1.jar. I added it to /lib folder and now it is working.

It's really strange that this .jar is not in the installation product for TIBCO Jasper Reports 6.0.0 actually I descend until JR 3.7.6 which is the lowest version. The file is from 28/12/2008...

Nice...

回答2:

I used eclipse ecj-4.3.1.jar and it works.

回答3:

First checks the dependencies of jasperReports - for example version 6.1.0 - https://mvnrepository.com/artifact/net.sf.jasperreports/jasperreports/6.1.0

With this you can see if there is any dependency that is missing in your lib directory (webApp) or inside your .jar (if it is a main application of java).

That mistake also happened to me, and I solved it by adding dependence

<groupId>org.eclipse.jdt.core.compiler</groupId>
<artifactId>ecj</artifactId>
<version>4.3.1</version>

I hope it supports you

来源：https://stackoverflow.com/questions/29753457/jasper-reports-package-net-sf-jasperreports-engine-does-not-exist-exception-in

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