我正在使用 Mule Studio 3.4 并想尝试使用 Active Mq。我知道 ActiveMq 嵌入在 Mule 中，因此没有必要在类路径中添加 jar，顺便说在类路径中找不到 activeMq 类。我哪里错了？这是我的配置（从http://www.mulesoft.org/mule-activemq-integration-examples复制）：
<?xml version="1.0" encoding="UTF-8"?>
<mule xmlns:jms="http://www.mulesoft.org/schema/mule/jms"
xmlns="http://www.mulesoft.org/schema/mule/core" xmlns:doc="http://www.mulesoft.org/schema/mule/documentation" xmlns:spring="http://www.springframework.org/schema/beans" version="EE-3.4.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="
http://www.mulesoft.org/schema/mule/jms http://www.mulesoft.org/schema/mule/jms/current/mule-jms.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-current.xsd
http://www.mulesoft.org/schema/mule/core http://www.mulesoft.org/schema/mule/core/current/mule.xsd">
<spring:beans>
<spring:bean id="AmqDeadLetterStrategy"
class="org.apache.activemq.broker.region.policy.IndividualDeadLetterStrategy"
p:queuePrefix="DLQ." />
<spring:bean id="AmqDefaultPolicyEntry"
class="org.apache.activemq.broker.region.policy.PolicyEntry"
p:queue="jobs.*"
p:deadLetterStrategy-ref="AmqDeadLetterStrategy" />
<spring:bean id="AmqPolicyMap"
class="org.apache.activemq.broker.region.policy.PolicyMap"
p:defaultEntry-ref="AmqDefaultPolicyEntry" />
<spring:bean name="AmqBroker"
class="org.apache.activemq.broker.BrokerService"
p:brokerName="esb-amq-broker"
p:persistent="true"
p:dataDirectory="${activemq.data.dir}"
p:useJmx="true"
p:useShutdownHook="false"
p:destinationPolicy-ref="AmqPolicyMap"
init-method="start"
destroy-method="stop" />
<spring:bean name="AmqRedeliveryPolicy"
class="org.apache.activemq.RedeliveryPolicy"
p:useExponentialBackOff="true" />
<spring:bean name="AmqConnectionFactory"
class="org.apache.activemq.spring.ActiveMQConnectionFactory"
p:brokerURL="vm://esb-amq-broker"
p:redeliveryPolicy-ref="AmqRedeliveryPolicy"
depends-on="AmqBroker" />
</spring:beans>
<jms:activemq-connector name="EsbJmsConnector"
specification="1.1"
connectionFactory-ref="AmqConnectionFactory"
disableTemporaryReplyToDestinations="true"
persistentDelivery="true" />
</mule>
错误是“无法在项目的构建路径上找到类型 org.apache.activemq.broker.region.policy.IndividualDeadLetterStrategy ...”和类似的其他错误。谢谢！