我正在尝试配置一个安装了插件的 activemq 代理，但似乎无法在代理配置文件中正确获取插件类的限定名称。我已经粘贴了错误消息，然后是下面的代理配置。基本上在元素中我指定 class="file:C:/Marcus/JavaProjects/Project/build/prod/classes/com/foo/jms/amqplugin/XmlValidationPlugin" 这是 XmlValidationPlugin.class 文件的绝对路径（有尝试将 .class 附加到上面的路径，但我得到了同样的错误）。最初我假设类属性应该指向 .class 文件，但尝试将其指向 .java 并且仍然无法正常工作。我已经阅读了关于开发插件、常见问题解答、spring 文档等的活动 MQ 常见问题解答。
我的类路径是 .;JAVA_HOME\lib;C:\Marcus\JavaProjects\Project;C:\Marcus\JavaProjects\Project\build\prod\classes 和 JAVA_HOME 是：C:\Program Files\Java\jdk1.7.0_03
所有 java 源代码都位于 C:\Marcus\JavaProjects\Project\src 中，.class 文件位于 C:\Marcus\JavaProjects\Project\build\prod\classes 中（类中的文件结构反映了 src 中的文件结构，例如com.foo.jms.amqplugin.XmlValidationPlugin 将在 classes/com/foo/jms/amqplugin 中拥有其 .class 文件）
有问题的插件是 XmlValidationPlugin.java，位于包中的文件夹 src 中：com.foo.jms.amqplugin
我曾尝试将 XmlValidationPlugin.class 放在 JAR 中并将 JAR 放在 activemqinstalldir/lib 中（正如向其他遇到类似问题的人所推荐的那样），但这并没有帮助。
我已经花了一天半的时间，如果有人知道 plugins 类属性的值应该是什么，我将不胜感激，因为我已经尝试了一切......提前致谢！
错误输出顶部：
C:\Program Files\apache-activemq-5.5.1>bin\activemq xbean:file:C:/Marcus/JavaProjects/Project/config/custom-broker.xml
Java Runtime: Oracle Corporation 1.7.0_03 C:\Program Files\Java\jdk1.7.0_03\jre
Heap sizes: current=15872k free=14246k max=506816k
JVM args: -Dcom.sun.management.jmxremote -Xmx512M -Dorg.apache.activemq.UseDedicatedTaskRunner=true -Djava.util.logging.config.file=logging.properties -Dactivemq.classpath=C:\Program Files\apache-
activemq-5.5.1\bin\../conf;C:\Program Files\apache-activemq-5.5.1\bin\../conf; -Dactivemq.home=C:\Program Files\apache-activemq-5.5.1\bin\.. -Dactivemq.base=C:\Program Files\apache-activemq-5.5.1\bin\
..
ACTIVEMQ_HOME: C:\Program Files\apache-activemq-5.5.1\bin\..
ACTIVEMQ_BASE: C:\Program Files\apache-activemq-5.5.1\bin\..
Loading message broker from: xbean:file:C:/Marcus/JavaProjects/Project/config/custom-broker.xml
INFO | Refreshing org.apache.activemq.xbean.XBeanBrokerFactory$1@7a8ba4: startup date [Thu Apr 12 10:38:26 CEST 2012]; root of context hierarchy
ERROR: java.lang.RuntimeException: Failed to execute start task. Reason: org.springframework.beans.factory.BeanDefinitionStoreException: Failed to load type: file:C:/Marcus/JavaProjects/Project/build/prod/classes/com/foo/jms/amqplugin/XmlValidationPlugin. Reason: java.lang.ClassNotFoundException: file:C:/Marcus/JavaProjects/Project/build/prod/classes/com/foo/jms/amqplugin/XmlValidationPlugin; nested exception is java.lang.ClassNotFoundException: file:C:/Marcus/JavaProjects/Project/build/prod/classes/com/foo/jms/amqplugin/XmlValidationPlugin
java.lang.RuntimeException: Failed to execute start task. Reason: org.springframework.beans.factory.BeanDefinitionStoreException: Failed to load type: file:C:/Marcus/JavaProjects/Project/build/prod/classes/com/foo/jms/amqplugin/XmlValidationPlugin.
Reason: java.lang.ClassNotFoundException: file:C:/Marcus/JavaProjects/Project/build/prod/classes/com/foo/jms/amqplugin/XmlValidationPlugin; nested exception is java.lang.ClassNotFoundException: file:C:/Marcus/JavaProjects/Project/build/prod/classes/com/foo/jms/amqplugin/XmlValidationPlugin
at org.apache.activemq.console.command.StartCommand.runTask(StartCommand.java:98)
at org.apache.activemq.console.command.AbstractCommand.execute(AbstractCommand.java:57)
at org.apache.activemq.console.command.ShellCommand.runTask(ShellCommand.java:143)
at org.apache.activemq.console.command.AbstractCommand.execute(AbstractCommand.java:57)
at org.apache.activemq.console.command.ShellCommand.main(ShellCommand.java:85)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
...
经纪人配置文件：
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:amq="http://activemq.apache.org/schema/core"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
http://activemq.apache.org/schema/core http://activemq.apache.org/schema/core/activemq-core.xsd">
<!-- Allows us to use system properties as variables in this configuration file -->
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<value>file:${activemq.base}/conf/credentials.properties</value>
</property>
</bean>
<!--The <broker> element is used to configure the ActiveMQ broker. -->
<broker xmlns="http://activemq.apache.org/schema/core" brokerName="localhost"
dataDirectory="${activemq.base}/data">
...
<!--plugin-->
<plugins>
<bean xmlns="http://www.springframework.org/schema/beans"
id="xmlValidationPlugin"
class="com.foo.jms.amqplugin.XmlValidationPlugin"/>
</plugins>
</broker>
</beans>