Hi experts , I am looking for a working example that explains generating simple report in excel or pdf
all examples I found , when I use them it gives me this error !!!
log4j:WARN No appenders could be found for logger (net.sf.jasperreports.engine.xml.JRXmlDigesterFactory).
log4j:WARN Please initialize the log4j system properly.
Exception in thread "main" java.lang.NoClassDefFoundError: org/codehaus/groovy/control/CompilationFailedException