配置 web.xml 引用数据源的错误信息如下:
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2011-6-27 21:28:34 org.apache.tomcat.util.digester.Digester endElement
严重: End event threw exception
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:592)
?at org.apache.tomcat.util.IntrospectionUtils.callMethod1(IntrospectionUtils.java:928)
?at org.apache.catalina.startup.SetNextNamingRule.end(SetNextNamingRule.java:98)
?at org.apache.tomcat.util.digester.Rule.end(Rule.java:229)
?at org.apache.tomcat.util.digester.Digester.endElement(Digester.java:1138)
?at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endElement(AbstractSAXParser.java:633)
?at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanEndElement(XMLDocumentFragmentScannerImpl.java:1241)
?at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(XMLDocumentFragmentScannerImpl.java:1685)
?at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:368)
?at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:834)
?at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:764)
?at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:148)
?at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1242)
?at org.apache.tomcat.util.digester.Digester.parse(Digester.java:1642)
?at org.apache.catalina.startup.ContextConfig.applicationWebConfig(ContextConfig.java:365)
?at org.apache.catalina.startup.ContextConfig.start(ContextConfig.java:1076)
?at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:261)
?at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
?at org.apache.catalina.core.StandardContext.start(StandardContext.java:4540)
?at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
?at org.apache.catalina.core.StandardHost.start(StandardHost.java:785)
?at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
?at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:445)
?at org.apache.catalina.core.StandardService.start(StandardService.java:519)
?at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
?at org.apache.catalina.startup.Catalina.start(Catalina.java:581)
?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:592)
?at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
?at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
Caused by: java.lang.NullPointerException
?at java.util.Hashtable.put(Hashtable.java:396)
?at org.apache.catalina.deploy.NamingResources.addResource(NamingResources.java:298)
?... 35 more
2011-6-27 21:28:34 org.apache.catalina.startup.ContextConfig applicationWebConfig
严重: Parse error in application web.xml file at jndi:/localhost/MyDataSource/WEB-INF/web.xml
java.lang.NullPointerException
?at org.apache.tomcat.util.digester.Digester.createSAXException(Digester.java:2806)
?at org.apache.tomcat.util.digester.Digester.createSAXException(Digester.java:2832)
?at org.apache.tomcat.util.digester.Digester.endElement(Digester.java:1141)
?at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endElement(AbstractSAXParser.java:633)
?at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanEndElement(XMLDocumentFragmentScannerImpl.java:1241)
?at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(XMLDocumentFragmentScannerImpl.java:1685)
?at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:368)
?at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:834)
?at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:764)
?at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:148)
?at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1242)
?at org.apache.tomcat.util.digester.Digester.parse(Digester.java:1642)
?at org.apache.catalina.startup.ContextConfig.applicationWebConfig(ContextConfig.java:365)
?at org.apache.catalina.startup.ContextConfig.start(ContextConfig.java:1076)
?at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:261)
?at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
?at org.apache.catalina.core.StandardContext.start(StandardContext.java:4540)
?at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
?at org.apache.catalina.core.StandardHost.start(StandardHost.java:785)
?at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
?at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:445)
?at org.apache.catalina.core.StandardService.start(StandardService.java:519)
?at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
?at org.apache.catalina.startup.Catalina.start(Catalina.java:581)
?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:592)
?at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
?at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
Caused by: java.lang.NullPointerException
?at java.util.Hashtable.put(Hashtable.java:396)
?at org.apache.catalina.deploy.NamingResources.addResource(NamingResources.java:298)
?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:592)
?at org.apache.tomcat.util.IntrospectionUtils.callMethod1(IntrospectionUtils.java:928)
?at org.apache.catalina.startup.SetNextNamingRule.end(SetNextNamingRule.java:98)
?at org.apache.tomcat.util.digester.Rule.end(Rule.java:229)
?at org.apache.tomcat.util.digester.Digester.endElement(Digester.java:1138)
?... 27 more
2011-6-27 21:28:34 org.apache.catalina.startup.ContextConfig applicationWebConfig
严重: Occurred at line 12 column 18
2011-6-27 21:28:34 org.apache.catalina.startup.ContextConfig start
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解决方案:
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我出现此错误的原因是因为,在web.xml中配置引用数据源的时候,少配置了
<res-type>javax.sql.DataSource</res-type>
这个,所以，启动的Tomcat的时候,出现了空指针异常NullPotionException.
加上去就没事了..
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启动成功!
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<!-- 引用数据源; --> <resource-ref> <description>Oracle dataSource</description> <res-ref-name>jdbc/DBSource</res-ref-name> <res-type>javax.sql.DataSource</res-type> <res-auth>Container</res-auth> <res-sharing-scope>Shareable</res-sharing-scope> </resource-ref>
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