spring Jaxb2Marshaller+contextPath+tomcat嵌入maven抛出
我正在使用 spring 的 Jaxb2Marshaller （没有 Web 服务）来解组一些 xml。 xml代码是通过maven-jaxb-plugin进行代码生成的，我在spring中通过以下方式实例化Jaxb2Marshaller：
<bean id="unmarshaller" class="...Jaxb2Marshaller" p:contextPath="my.package.path" />
然后开始：
mvn clean package
mvn tomcat:run
第一个解组器创建良好，第二个抛出org.springframework.oxm.jaxb.JaxbSystemException，因为它可以找不到 ObjectFactory （它是由 maven-jaxb-plugin 生成的，我已经验证它实际上存在于 jar 中，位于正确的包中）。
我实际上有两个解组器（尽管我尝试过使用一个解组器和带有冒号分隔的包路径的 contextPath，但结果相同）。
我不认为这通常是 spring 或我的配置的问题，因为如果我部署到完整的 tomcat 容器中，它就可以正常工作。我确实注意到maven将tomcat放在我的project/target/tomcat文件夹中并且存在一些差异，例如没有lib目录。我实际上不知道嵌入式 tomcat 和常规安装之间有什么区别。
有人可以解释一下吗：
1) 嵌入式 tomcat 与常规安装的具体区别
2) 是否存在已知的限制
3）在这种情况下是否可以配置为正常工作
完整的堆栈跟踪：
SEVERE: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'unmarshaller' defined in class path resource [spring.xml]: Invocation of init method failed; nested exception is org.springframework.oxm.jaxb.JaxbSystemException: "my.package.path" doesnt contain ObjectFactory.class or jaxb.index; nested exception is javax.xml.bind.JAXBException: "my.package.path" doesnt contain ObjectFactory.class or jaxb.index
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1338)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:473)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory$1.run(AbstractAutowireCapableBeanFactory.java:409)
at java.security.AccessController.doPrivileged(Native Method)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:380)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:264)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:261)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:185)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:164)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:429)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:728)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:380)
at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:255)
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:199)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:45)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4135)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4630)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
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.startup.Embedded.start(Embedded.java:825)
at org.codehaus.mojo.tomcat.AbstractRunMojo.startContainer(AbstractRunMojo.java:558)
at org.codehaus.mojo.tomcat.AbstractRunMojo.execute(AbstractRunMojo.java:255)
I'm using spring's Jaxb2Marshaller (without web services) to unmarshal some xml. The xml code is code-gen via maven-jaxb-plugin, and I instantiate the Jaxb2Marshaller in spring via:
<bean id="unmarshaller" class="...Jaxb2Marshaller" p:contextPath="my.package.path" />
Then start with:
mvn clean package
mvn tomcat:run
The first unmarshaller is created fine, the second throws with org.springframework.oxm.jaxb.JaxbSystemException because it can't find ObjectFactory (which is generated by the maven-jaxb-plugin, and I've verified is in fact present in the jar, in the correct package).
I actually have two unmarshallers, (although I've tried with one unmarshaller and contextPath with colon separated package paths, with same results).
I don't think this is generally a problem with spring or my configuration, because if I deploy into a full tomcat container it works fine. I did notice that maven puts tomcat in my project/target/tomcat folder and there are some differences, such as there is no lib directory. I actually don't know what all the differences are between embedded tomcat and a regular installation.
Can someone explain:
1) exactly how embedded tomcat differs from a regular installation
2) if there are known limitations
3) if it can be configured to work properly in this situtation
Full stack trace:
SEVERE: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'unmarshaller' defined in class path resource [spring.xml]: Invocation of init method failed; nested exception is org.springframework.oxm.jaxb.JaxbSystemException: "my.package.path" doesnt contain ObjectFactory.class or jaxb.index; nested exception is javax.xml.bind.JAXBException: "my.package.path" doesnt contain ObjectFactory.class or jaxb.index
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1338)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:473)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory$1.run(AbstractAutowireCapableBeanFactory.java:409)
at java.security.AccessController.doPrivileged(Native Method)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:380)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:264)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:261)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:185)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:164)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:429)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:728)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:380)
at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:255)
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:199)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:45)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4135)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4630)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
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.startup.Embedded.start(Embedded.java:825)
at org.codehaus.mojo.tomcat.AbstractRunMojo.startContainer(AbstractRunMojo.java:558)
at org.codehaus.mojo.tomcat.AbstractRunMojo.execute(AbstractRunMojo.java:255)
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对于遇到此问题的其他人，我最终通过使用classesToBeBound 属性而不是contextPath 解决了问题。我最初避免使用classesToBeBound 的原因是我认为我必须在classesToBeBound 列表中指定模型中的每个类，但事实并非如此。您只需指定具有 @XmlRootElement 注释的类即可。
For anyone else who runs across this, I eventually solved the problem by using classesToBeBound property instead of contextPath. The reason I had initially avoided classesToBeBound was that I thought I had to specify every single class in the model in the classesToBeBound list, which isn't the case. You simply specify the class that has the @XmlRootElement annotation.