我得到以下错误：

2014-06-30 15:14:08,089 ERROR [SinkRunner-PollingRunner-DefaultSinkProcessor] (org.apache.flume.SinkRunner$PollingRunner.run:160)  - Unable to deliver event. Exception follows.
org.springframework.beans.factory.parsing.BeanDefinitionParsingException: Configuration problem: Unable to locate Spring NamespaceHandler for XML schema namespace [http://www.springframework.org/schema/jee]
Offending resource: class path resource [beans/esb-message.xml]

esb-message.xml的头是：

xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:integration="http://www.springframework.org/schema/integration"       
xmlns:jee="http://www.springframework.org/schema/jee"          
xmlns:jms="http://www.springframework.org/schema/integration/jms"
xmlns:util="http://www.springframework.org/schema/util" 
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/integration
http://www.springframework.org/schema/integration/spring-integration-2.0.xsd
http://www.springframework.org/schema/integration/jms
http://www.springframework.org/schema/integration/jms/spring-integration-jms-2.0.xsd
http://www.springframework.org/schema/jee 
http://www.springframework.org/schema/jee/spring-jee-3.0.xsd
http://www.springframework.org/schema/util 
http://www.springframework.org/schema/util/spring-util-3.0.xsd">

据我所知，它基本上缺少jee的namespacehandler。当我在线搜索时，jeenamespacehandler位于spring-context.jar中。我的Maven图书馆里有那个jar。但为什么我还是会犯这个错误呢？