一用log4j就报错。
不添加dbcpconfig.properties这个配置文件，就不报错。一添加这个配置文件，访问一个jsp页面的时候，就报如下错误。不清楚到底是什么问题。提示找不到JsonAction。可是jsp没有访问这个action啊。。。

There is no Action mapped for action name jsonAction. - [unknown location]

	at com.opensymphony.xwork2.DefaultActionProxy.prepare(DefaultActionProxy.java:177)

	at org.apache.struts2.impl.StrutsActionProxy.prepare(StrutsActionProxy.java:61)

	at org.apache.struts2.impl.StrutsActionProxyFactory.createActionProxy(StrutsActionProxyFactory.java:39)

	at com.opensymphony.xwork2.DefaultActionProxyFactory.createActionProxy(DefaultActionProxyFactory.java:47)

	at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:458)

	at org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)

	at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:76)

	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)

	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)

	at org.apache.struts2.dispatcher.ActionContextCleanUp.doFilter(ActionContextCleanUp.java:102)

	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)

	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)

	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)

	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)

	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)

	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)

	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)

	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:261)

	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)

	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:581)

	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)

	at java.lang.Thread.run(Thread.java:619)

------解决方案--------------------
那就把配置文件中的配置一行一行删了之后测
看是加了什么之后报的错