tomcat错误

我用JBuilder建立了一个项目,里面只有一个jsp页面,运行时出现如下错误,在eclipse中一样,谁遇见过同样的问题帮忙解决下,谢谢
log4j:WARN No appenders could be found for logger (org.apache.catalina.startup.Embedded).log4j:WARN Please initialize the log4j system properly.java.lang.reflect.InvocationTargetException at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:324) at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:284) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:422)Caused by: javax.xml.parsers.FactoryConfigurationError: Provider org.apache.xerces.jaxp.DocumentBuilderFactoryImpl not found at javax.xml.parsers.DocumentBuilderFactory.newInstance(DocumentBuilderFactory.java:99) at org.apache.commons.modeler.util.DomUtil.readXml(DomUtil.java:284) at org.apache.commons.modeler.modules.MbeansDescriptorsDOMSource.execute(MbeansDescriptorsDOMSource.java:130) at org.apache.commons.modeler.modules.MbeansDescriptorsDOMSource.loadDescriptors(MbeansDescriptorsDOMSource.java:120) at org.apache.commons.modeler.Registry.load(Registry.java:819) at org.apache.commons.modeler.Registry.loadDescriptors(Registry.java:931) at org.apache.commons.modeler.Registry.loadDescriptors(Registry.java:909) at org.apache.commons.modeler.Registry.findDescriptor(Registry.java:992) at org.apache.commons.modeler.Registry.findManagedBean(Registry.java:696) at org.apache.commons.modeler.Registry.findManagedBean(Registry.java:1047) at org.apache.commons.modeler.Registry.registerComponent(Registry.java:859) at org.apache.catalina.loader.WebappLoader.init(WebappLoader.java:612) at org.apache.catalina.loader.WebappLoader.start(WebappLoader.java:644) at org.apache.catalina.core.StandardContext.start(StandardContext.java:4231) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1083) at org.apache.catalina.core.StandardHost.start(StandardHost.java:789) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1083) at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:478) at org.apache.catalina.core.StandardService.start(StandardService.java:480) at org.apache.catalina.core.StandardServer.start(StandardServer.java:2313) at org.apache.catalina.startup.Catalina.start(Catalina.java:556) ... 6 more