struts 配数据源的错误，谁能帮帮我？

Question

Struts开发数据方面，可参考这里：
http://www.javawebstudio.com/html/  9、如何实现Struts 数据库应用程序    10、如何在Struts 数据库应用程序中实现分页显示    11、如何在Struts 数据库应用程序中实现记录的删除、更新及链接    12、如何在Struts 数据库应用程序中实现记录的添加    13、如何建立一个带登陆页面的Struts数据库应用程序    14、如何建立一个带登陆页面及角色的Struts数据库应用程序

Answer 1

在struts-config.xml中配置：
  <data-sources>
    <data-source>
      <set-property property="autoCommit" value="false" />
      <set-property property="description" value="Database for Personal of System" />
      <set-property property="driverClass" value="oracle.jdbc.driver.OracleDriver" />
      <set-property property="maxCount" value="5" />
      <set-property property="minCount" value="1" />
      <set-property property="url" value="jdbc:oracle:thin:@ytb:1521:ORCL" />
      <set-property property="user" value="crm" />
      <set-property property="password" value="crm" />
    </data-source>
  </data-sources>

Answer 2

mysql的配置：
data-sources>
<data-source>
<set-property property="autoCommit" value="true"/><set-property property="description" value="MySql Data Source"/>
<set-property property="driverClass" value="com.caucho.jdbc.mysql.Driver"/>
<set-property property="maxCount" value="10"/>
<set-property property="minCount" value="2"/>
<set-property property="user" value="admin"/>
<set-property property="password" value="admin"/>
<set-property property="url"
value="jdbc:mysql-caucho://localhost:3306/storefront"/>
</data-source>
</data-sources>

Answer 3

我也有错误！但是错误信息不一致！　大家帮忙看看！　谢谢！
_______________________________________________________2004-12-31 12:17:30 org.apache.struts.action.ActionServlet initModuleDataSources
严重: Initializing application data source QuerySystem
java.lang.NullPointerException
        at java.net.URLClassLoader$1.run(URLClassLoader.java:190)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:187)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:289)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:282)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:274)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:235)
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1255)
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1189)
        at org.apache.struts.util.RequestUtils.applicationClass(RequestUtils.java:119)
        at org.apache.struts.util.RequestUtils.applicationInstance(RequestUtils.java:145)
        at org.apache.struts.action.ActionServlet.initModuleDataSources(ActionServlet.java:775)
        at org.apache.struts.action.ActionServlet.init(ActionServlet.java:331)
        at javax.servlet.GenericServlet.init(GenericServlet.java:211)
        at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1029)
        at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:862)
        at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4017)
        at org.apache.catalina.core.StandardContext.start(StandardContext.java:4337)
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:823)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:807)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:595)
        at org.apache.catalina.core.StandardHostDeployer.addChild(StandardHostDeployer.java:903)
        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.commons.beanutils.MethodUtils.invokeMethod(MethodUtils.java:216)
        at org.apache.commons.digester.SetNextRule.end(SetNextRule.java:256)
        at org.apache.commons.digester.Rule.end(Rule.java:276)
        at org.apache.commons.digester.Digester.endElement(Digester.java:1058)
        at org.apache.catalina.util.CatalinaDigester.endElement(CatalinaDigester.java:76)
        at org.apache.xerces.parsers.AbstractSAXParser.endElement(Unknown Source)
        at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanEndElement(Unknown Source)
        at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(
Unknown Source)
        at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
        at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
        at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
        at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
        at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
        at org.apache.commons.digester.Digester.parse(Digester.java:1567)
        at org.apache.catalina.core.StandardHostDeployer.install(StandardHostDeployer.java:488)
        at org.apache.catalina.core.StandardHost.install(StandardHost.java:863)
        at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:483)
        at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:427)
        at org.apache.catalina.startup.HostConfig.start(HostConfig.java:983)
        at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:349)
        at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
        at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1091)
        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)
        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:287)
        at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:425)