java.lang.IllegalArgumentException: Can't convert argument: null

tomcat6.0运行javaWeb程序时报出如下错误：

java.lang.IllegalArgumentException: Can't convert argument: null
	at org.apache.tomcat.util.IntrospectionUtils.convert(IntrospectionUtils.java:1005)
	at org.apache.tomcat.util.digester.CallMethodRule.end(CallMethodRule.java:523)
	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:601)
	at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanEndElement(XMLDocumentFragmentScannerImpl.java:1774)
	at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2930)
	at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:648)
	at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:510)
	at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:807)
	at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:737)
	at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:107)
	at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1205)
	at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:522)
	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.addChildInternal(ContainerBase.java:791)
	at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
	at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:546)
	at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1041)
	at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:964)
	at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:502)
	at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1277)
	at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:321)
	at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
	at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
	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:597)
	at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
	at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
2013-11-5 13:40:11 org.apache.catalina.startup.ContextConfig applicationWebConfig
严重: Parse error in application web.xml file at jndi:/localhost/SocietyApplyTest/WEB-INF/web.xml

解决办法： 将web.xml中的javaee前缀去掉即可。

如将下面的代码片段：

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:javaee="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
  <javaee:display-name>BlazeDS</javaee:display-name>
  <javaee:description>BlazeDS Application</javaee:description>
  <context-param>
    <javaee:param-name>contextConfigLocation</javaee:param-name>
    <javaee:param-value>/WEB-INF/classes/applicationContext.xml</javaee:param-value>
  </context-param>
  <listener>
    <javaee:listener-class>org.springframework.web.context.ContextLoaderListener</javaee:listener-class>
  </listener>
  <listener>
    <javaee:listener-class>org.springframework.web.util.IntrospectorCleanupListener</javaee:listener-class>
  </listener>
  <listener>
    <javaee:listener-class>flex.messaging.HttpFlexSession</javaee:listener-class>
  </listener>
  <servlet>
    <javaee:display-name>MessageBrokerServlet</javaee:display-name>
    <servlet-name>MessageBrokerServlet</servlet-name>
    <servlet-class>flex.messaging.MessageBrokerServlet</servlet-class>
    <init-param>
      <javaee:param-name>services.configuration.file</javaee:param-name>
      <javaee:param-value>/WEB-INF/flex/services-config.xml</javaee:param-value>
    </init-param>
    <load-on-startup>2</load-on-startup>
  </servlet>

改为：

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:javaee="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
  <display-name>BlazeDS</display-name>
  <description>BlazeDS Application</description>
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>/WEB-INF/classes/applicationContext.xml</param-value>
  </context-param>
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  <listener>
    <listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class>
  </listener>
  <listener>
    <listener-class>flex.messaging.HttpFlexSession</listener-class>
  </listener>
  <servlet>
    <display-name>MessageBrokerServlet</display-name>
    <servlet-name>MessageBrokerServlet</servlet-name>
    <servlet-class>flex.messaging.MessageBrokerServlet</servlet-class>
    <init-param>
      <param-name>services.configuration.file</param-name>
      <param-value>/WEB-INF/flex/services-config.xml</param-value>
    </init-param>
    <load-on-startup>2</load-on-startup>
  </servlet>