Struts数据源的配置问题
我配好DataSouce,从新启动Tomcat,显示出下面的错误:
严重: Initializing application data source org.apache.struts.action.DATA_SOURCE
java.lang.NullPointerException
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoa
der.java:1220)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoa
der.java:1156)
at org.apache.struts.util.RequestUtils.applicationClass(RequestUtils.jav
a:163)
at org.apache.struts.util.RequestUtils.applicationInstance(RequestUtils.
java:187)
at org.apache.struts.action.ActionServlet.initModuleDataSources(ActionSe
rvlet.java:813)
at org.apache.struts.action.ActionServlet.init(ActionServlet.java:389)
at javax.servlet.GenericServlet.init(GenericServlet.java:258)
at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:85
2)
at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContex
t.java:3267)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:3
384)
我的DataSource的配置如下:
<data-sources>
<data-source>
<set-property property="autoCommit" value="true"/>
<set-property property="description" value="Example Data Source Configuration"/>
<set-property property="driverClass" value="org.gjt.mm.mysql.Driver"/>
<set-property property="maxCount" value="4"/>
<set-property property="minCount" value="2"/>
<set-property property="password" value="" />
<set-property property="url" value="jdbc:mysql://127.0.0.1:3306/demo"/>
<set-property property="user" value="root"/>
</data-source>
</data-sources>
请问是错误的原因是什么,