Hi ,
I am using POI to create the reports in Excel format. But I am getting
Exception when while using the POI with my application. I am using
log4j.jar, log4j-core.jar in my application.
The problem is if I include commons-logging-1.0.jar in my classpath My
application is not working properly. It's throwing the following Exception.
*******************************************************
log4j:ERROR Could not instantiate class [org.apache.log4j.ConsoleAppender].
java.lang.ClassNotFoundException: org.apache.log4j.ConsoleAppender at
java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:297)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:286)
at java.lang.ClassLoader.loadClass(ClassLoader.java:253)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:313)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:120) at
org.apache.log4j.helpers.OptionConverter.instantiateByClassName(OptionConver
ter.java:195)
at
org.apache.log4j.helpers.OptionConverter.instantiateByKey(OptionConverter.ja
va:89)
at
org.apache.log4j.PropertyConfigurator.parseAppender(PropertyConfigurator.jav
a:574)
at
org.apache.log4j.PropertyConfigurator.parseCategory(PropertyConfigurator.jav
a:555)
at
org.apache.log4j.PropertyConfigurator.parseCatsAndRenderers(PropertyConfigur
ator.java:482)
at
org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:
390)
at
org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:
414)
at
org.apache.log4j.helpers.OptionConverter.selectAndConfigure(OptionConverter.
java:345)
at org.apache.log4j.Category.<clinit>(Category.java:160)
at
org.apache.commons.logging.impl.Log4JCategoryLog.<init>(Log4JCategoryLog.jav
a:97)
at java.lang.reflect.Constructor.newInstance(Native Method)
at
org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.ja
va:487)
at
org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.ja
va:285)
at
org.apache.poi.util.POILogFactory.getLogger(POILogFactory.java:121)
at
org.apache.poi.util.POILogFactory.getLogger(POILogFactory.java:100)
at
org.apache.poi.hssf.usermodel.HSSFWorkbook.<clinit>(HSSFWorkbook.java:113)
at test.ExcelSheet2.main(ExcelSheet2.java:27) log4j:ERROR Could not
instantiate appender named "stdout".
*******************************************************
Is the problem with log4j.jar, log4j-core.jar ? How can I resolve this
problem?
Thank you
Srinivas Medukonduru
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