trying

[gchavarr]

Help

i´m trying the JasperReports for Java Developers Book source code it has a MapCollectionDSReportServlet example but it says that you had to use version 1.0.1 of jasperreports, I try to update the example for using jasperreports-1.2.5 jar and an error comes out. I also try putting commons-javaflow-20060411 jar in the classpath but the error remains.

 

GRAVE: Servlet.service() para servlet MapCollectionDSReportServlet lanzó excepción

java.lang.NoClassDefFoundError: org/apache/commons/javaflow/bytecode/Continuable

at java.lang.ClassLoader.defineClass1(Native Method)

at java.lang.ClassLoader.defineClass(Unknown Source)

at java.security.SecureClassLoader.defineClass(Unknown Source)

at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:1812)

at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:866)

at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1319)

at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1198)

at java.lang.ClassLoader.loadClassInternal(Unknown Source)

at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:601)

at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:582)

at net.sf.jasperreports.engine.JasperRunManager.runReportToPdfStream(JasperRunManager.java:368)

at net.ensode.jasperbook.MapCollectionDSReportServlet.doGet(MapCollectionDSReportServlet.java:81)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:689)

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:869)

at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)

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(Unknown Source) [file name=MapCollectionDSReportServlet.txt size=3068]http://www.jasperforge.org/components/com_joomlaboard/uploaded/files/MapCollectionDSReportServlet.txt[/file]

Post edited by: gchavarr, at: 2006/09/05 22:48

[lucianc]

Hello

 

This error is caused by the classloader not being able to load Javaflow classes. Are you sure this error still occurs when the Javaflow jar is on your application's classpath?

 

Regards,

Lucian