how to use ant tool to build my application?

[JeanX]

Hi struts-user,

I apologize  in advance for this kind of problem ,but I think it is the best 
mailing-list I am aware of :)
So when I use the ant to build my application, there are some error:

Buildfile: build.xml
BUILD FAILED
javax.xml.parsers.FactoryConfigurationError: org.apache.crimson.jaxp.SAXParserFa
ctoryImpl
        at javax.xml.parsers.SAXParserFactory.newInstance(SAXParserFactory.java:
95)
        at org.apache.tools.ant.ProjectHelper.getParserFactory(ProjectHelper.jav
a:706)
        at org.apache.tools.ant.ProjectHelper.parse(ProjectHelper.java:105)
        at org.apache.tools.ant.ProjectHelper.configureProject(ProjectHelper.jav
a:85)
        at org.apache.tools.ant.Main.runBuild(Main.java:403)
        at org.apache.tools.ant.Main.main(Main.java:149)

Total time: 0 seconds
org.apache.crimson.jaxp.SAXParserFactoryImpl

And I have put ant.jar, jaxp.jar, servlet.jar, and parser.jar these archives under 
$TOMCAT_HOME/lib directory . 

please help me .thx


:=)
Best regards,
JeanX
pacificnet.com(GZ)