JAVA零碎要点008---tomcat启动的时候报错了严重: End event threw exception java.lang.reflect.InvocationTargetExcepti

tomcat启动的时候报错了:
严重: End event threw exception
java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:601)
        at org.apache.tomcat.util.IntrospectionUtils.callMethodN(IntrospectionUt
ils.java:930)
        at org.apache.catalina.startup.CallMethodMultiRule.end(WebRuleSet.java:7
60)
        at org.apache.tomcat.util.digester.Rule.end(Rule.java:229)
        at org.apache.tomcat.util.digester.Digester.endElement(Digester.java:105
8)
        at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endEleme
nt(AbstractSAXParser.java:606)
        at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.endNamesp
aceScope(XMLDTDValidator.java:2054)
        at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.handleEnd
Element(XMLDTDValidator.java:2005)
        at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.endElemen
t(XMLDTDValidator.java:879)
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImp
l.scanEndElement(XMLDocumentFragmentScannerImpl.java:1741)
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImp
l$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2898)
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(X
MLDocumentScannerImpl.java:607)
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImp
l.scanDocument(XMLDocumentFragmentScannerImpl.java:488)
        at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(X
ML11Configuration.java:835)
        at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(X
ML11Configuration.java:764)
        at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.
java:123)
        at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Ab
stractSAXParser.java:1210)
        at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.p
arse(SAXParserImpl.java:568)
        at org.apache.tomcat.util.digester.Digester.parse(Digester.java:1562)
        at org.apache.catalina.startup.ContextConfig.applicationWebConfig(Contex
tConfig.java:369)
        at org.apache.catalina.startup.ContextConfig.start(ContextConfig.java:10
62)
        at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfi
g.java:261)
        at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(Lifecycl
eSupport.java:120)
        at org.apache.catalina.core.StandardContext.start(StandardContext.java:4
238)
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase
.java:761)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:74
1)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:525)


        at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:825)


        at org.apache.catalina.startup.HostConfig.deployWARs(HostConfig.java:714
)
        at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:490
)
        at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1138)
        at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java
:311)
        at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(Lifecycl
eSupport.java:120)
        at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1023)


        at org.apache.catalina.core.StandardHost.start(StandardHost.java:719)
        at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1015)


        at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443
)
        at org.apache.catalina.core.StandardService.start(StandardService.java:4
48)
        at org.apache.catalina.core.StandardServer.start(StandardServer.java:710
)
        at org.apache.catalina.startup.Catalina.start(Catalina.java:552)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:601)
        at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288)
        at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)
Caused by: java.lang.IllegalArgumentException: Invalid <url-pattern> hello.do in
 servlet mapping
        at org.apache.catalina.core.StandardContext.addServletMapping(StandardCo
ntext.java:2385)
        at org.apache.catalina.core.StandardContext.addServletMapping(StandardCo
ntext.java:2361)
        ... 49 more


四月 10, 2017 10:22:16 下午 org.apache.catalina.startup.ContextConfig applicatio
nWebConfig
严重: Parse error in application web.xml file at jndi:/localhost/hello/WEB-INF/w
eb.xml
org.xml.sax.SAXParseException; systemId: jndi:/localhost/hello/WEB-INF/web.xml;
lineNumber: 15; columnNumber: 21; Error at (15, 21: Invalid <url-pattern> hello.
do in servlet mapping
        at org.apache.tomcat.util.digester.Digester.createSAXException(Digester.
java:2726)
        at org.apache.tomcat.util.digester.Digester.createSAXException(Digester.
java:2752)
        at org.apache.tomcat.util.digester.Digester.endElement(Digester.java:106
1)
        at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endEleme
nt(AbstractSAXParser.java:606)
        at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.endNamesp
aceScope(XMLDTDValidator.java:2054)
        at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.handleEnd
Element(XMLDTDValidator.java:2005)
        at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.endElemen
t(XMLDTDValidator.java:879)
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImp
l.scanEndElement(XMLDocumentFragmentScannerImpl.java:1741)
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImp
l$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2898)
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(X
MLDocumentScannerImpl.java:607)
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImp
l.scanDocument(XMLDocumentFragmentScannerImpl.java:488)
        at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(X
ML11Configuration.java:835)
        at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(X
ML11Configuration.java:764)
        at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.
java:123)
        at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Ab
stractSAXParser.java:1210)
        at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.p
arse(SAXParserImpl.java:568)
        at org.apache.tomcat.util.digester.Digester.parse(Digester.java:1562)
        at org.apache.catalina.startup.ContextConfig.applicationWebConfig(Contex
tConfig.java:369)
        at org.apache.catalina.startup.ContextConfig.start(ContextConfig.java:10
62)
        at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfi
g.java:261)
        at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(Lifecycl
eSupport.java:120)
        at org.apache.catalina.core.StandardContext.start(StandardContext.java:4
238)
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase
.java:761)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:74
1)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:525)


        at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:825)


        at org.apache.catalina.startup.HostConfig.deployWARs(HostConfig.java:714
)
        at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:490
)
        at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1138)
        at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java
:311)
        at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(Lifecycl
eSupport.java:120)
        at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1023)


        at org.apache.catalina.core.StandardHost.start(StandardHost.java:719)
        at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1015)


        at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443
)
        at org.apache.catalina.core.StandardService.start(StandardService.java:4
48)
        at org.apache.catalina.core.StandardServer.start(StandardServer.java:710
)
        at org.apache.catalina.startup.Catalina.start(Catalina.java:552)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:601)
        at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288)
        at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)
Caused by: java.lang.IllegalArgumentException: Invalid <url-pattern> hello.do in
 servlet mapping
        at org.apache.catalina.core.StandardContext.addServletMapping(StandardCo
ntext.java:2385)
        at org.apache.catalina.core.StandardContext.addServletMapping(StandardCo
ntext.java:2361)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:601)
        at org.apache.tomcat.util.IntrospectionUtils.callMethodN(IntrospectionUt
ils.java:930)
        at org.apache.catalina.startup.CallMethodMultiRule.end(WebRuleSet.java:7
60)
        at org.apache.tomcat.util.digester.Rule.end(Rule.java:229)
        at org.apache.tomcat.util.digester.Digester.endElement(Digester.java:105
8)
        ... 41 more


四月 10, 2017 10:22:16 下午 org.apache.catalina.startup.ContextConfig applicatio
nWebConfig
严重: Occurred at line 15 column 21
四月 10, 2017 10:22:16 下午 org.apache.catalina.startup.ContextConfig start
严重: Marking this application unavailable due to previous error(s)
四月 10, 2017 10:22:16 下午 org.apache.catalina.core.StandardContext start
严重: Error getConfigured
四月 10, 2017 10:22:16 下午 org.apache.catalina.core.StandardContext start
严重: Context [/hello] startup failed due to previous errors
四月 10, 2017 10:22:16 下午 org.apache.coyote.http11.Http11Protocol start
信息: Starting Coyote HTTP/1.1 on http-8080
四月 10, 2017 10:22:16 下午 org.apache.jk.common.ChannelSocket init
信息: JK: ajp13 listening on /0.0.0.0:8009
四月 10, 2017 10:22:16 下午 org.apache.jk.server.JkMain start
信息: Jk running ID=0 time=0/18  config=null
四月 10, 2017 10:22:16 下午 org.apache.catalina.startup.Catalina start
信息: Server startup in 273 ms




咱们看看,怎么解决这个问题:
检查一下,发现:
E:\apache-tomcat-6.0.10\webapps\hello\WEB-INF\web.xml
里面:
  <servlet-mapping>
    <servlet-name>HelloServlet</servlet-name>
    <url-pattern>hello.do</url-pattern>
  </servlet-mapping>
</web-app>
这里的配置:
  <servlet-mapping>
    <servlet-name>HelloServlet</servlet-name>
    //1.注意应该把hello.do改成/hello.do
    <url-pattern>/hello.do</url-pattern>
  </servlet-mapping>
</web-app>


这样就可以了.
-----------------------------------------------