找不到 XML 模式命名空间的 Spring NamespaceHandler [http://www.springframework.org/schema/data/mongo]答案

【问题标题】：Unable to locate Spring NamespaceHandler for XML schema namespace [http://www.springframework.org/schema/data/mongo]找不到 XML 模式命名空间的 Spring NamespaceHandler [http://www.springframework.org/schema/data/mongo]
【发布时间】：2013-04-16 02:01:24
【问题描述】：

我正在尝试构建一个示例 Spring+MongoDB 骨架，但出现以下运行时错误。

SEVERE: Context initialization failed
org.springframework.beans.factory.parsing.BeanDefinitionParsingException: Configuration problem: Unable to locate Spring NamespaceHandler for XML schema namespace [http://www.springframework.org/schema/data/mongo]
Offending resource: ServletContext resource [/WEB-INF/spring-servlet.xml]

    at org.springframework.beans.factory.parsing.FailFastProblemReporter.error(FailFastProblemReporter.java:68)
    at org.springframework.beans.factory.parsing.ReaderContext.error(ReaderContext.java:85)
    at org.springframework.beans.factory.parsing.ReaderContext.error(ReaderContext.java:80)
    at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.error(BeanDefinitionParserDelegate.java:284)
    at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1332)
    at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1325)
    at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.parseBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:135)
    at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.registerBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:93)
    at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.registerBeanDefinitions(XmlBeanDefinitionReader.java:493)
    at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:390)
    at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:334)
    at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:302)
    at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:143)
    at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:178)
    at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:149)
    at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:124)
    at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:93)
    at org.springframework.context.support.AbstractRefreshableApplicationContext.refreshBeanFactory(AbstractRefreshableApplicationContext.java:130)
    at org.springframework.context.support.AbstractApplicationContext.obtainFreshBeanFactory(AbstractApplicationContext.java:467)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:397)
    at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:276)
    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:197)
    at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:47)
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4887)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5381)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
    at java.util.concurrent.FutureTask.run(FutureTask.java:166)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:722)

Apr 23, 2013 7:14:57 AM org.apache.catalina.core.StandardContext listenerStart
SEVERE: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener
org.springframework.beans.factory.parsing.BeanDefinitionParsingException: Configuration problem: Unable to locate Spring NamespaceHandler for XML schema namespace [http://www.springframework.org/schema/data/mongo]
Offending resource: ServletContext resource [/WEB-INF/spring-servlet.xml]

    at org.springframework.beans.factory.parsing.FailFastProblemReporter.error(FailFastProblemReporter.java:68)
    at org.springframework.beans.factory.parsing.ReaderContext.error(ReaderContext.java:85)
    at org.springframework.beans.factory.parsing.ReaderContext.error(ReaderContext.java:80)
    at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.error(BeanDefinitionParserDelegate.java:284)
    at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1332)
    at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1325)
    at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.parseBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:135)
    at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.registerBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:93)
    at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.registerBeanDefinitions(XmlBeanDefinitionReader.java:493)
    at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:390)
    at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:334)
    at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:302)
    at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:143)
    at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:178)
    at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:149)
    at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:124)
    at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:93)
    at org.springframework.context.support.AbstractRefreshableApplicationContext.refreshBeanFactory(AbstractRefreshableApplicationContext.java:130)
    at org.springframework.context.support.AbstractApplicationContext.obtainFreshBeanFactory(AbstractApplicationContext.java:467)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:397)
    at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:276)
    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:197)
    at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:47)
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4887)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5381)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
    at java.util.concurrent.FutureTask.run(FutureTask.java:166)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:722)

供您参考，我的代码在github：
https://github.com/james-singh/maven-spring

知道如何解决这个问题吗？感谢您的时间。

编辑：
我检查了 jar 并在那里找到了 spring-mongodb xsd 文件。

james@james-Inspiron-1525:~/.m2/repository/org/springframework/data/spring-data-mongodb/1.2.0.RELEASE$ ls
_maven.repositories                                 spring-data-mongodb-1.2.0.RELEASE.pom
spring-data-mongodb-1.2.0.RELEASE.jar               spring-data-mongodb-1.2.0.RELEASE.pom.sha1
spring-data-mongodb-1.2.0.RELEASE.jar.sha1          spring-data-mongodb-1.2.0.RELEASE-sources.jar
spring-data-mongodb-1.2.0.RELEASE-javadoc.jar       spring-data-mongodb-1.2.0.RELEASE-sources.jar.sha1
spring-data-mongodb-1.2.0.RELEASE-javadoc.jar.sha1
james@james-Inspiron-1525:~/.m2/repository/org/springframework/data/spring-data-mongodb/1.2.0.RELEASE$ jar -tf spring-data-mongodb-1.2.0.RELEASE.jar | grep xsd
org/springframework/data/mongodb/config/spring-mongo-1.2.xsd
org/springframework/data/mongodb/config/spring-mongo-1.1.xsd
org/springframework/data/mongodb/config/spring-mongo-1.0.xsd
james@james-Inspiron-1525:~/.m2/repository/org/springframework/data/spring-data-mongodb/1.2.0.RELEASE$

【问题讨论】：

看起来你是在运行时而不是编译时得到这个。我无法在 Github 中编译您的项目；但是，如果包含 XSD 的 JAR 不存在于组装的 WAR 文件中，则通常会发生此类错误。您是否验证过 Spring MongoDB JAR 存在于您的 WEB-INF/lib 目录中？
是的，您向我们展示了 jar 位于您的 Maven 存储库中，但它们需要在运行时位于 Web 应用程序的类路径中，这通常意味着 WEB-INF/lib。你有与 github 中的不同的 pom 吗？我找不到你在哪里引用 spring-data jar。
可能与this question有关？

标签： spring mongodb maven configuration

【解决方案1】：

您必须确保您的 WEB-INF/libs 目录中有一个 spring-data-mongodb-1.2.0.RELEASE.jar。请检查！

【讨论】：

【解决方案2】：

我已经找到了解决这个问题的方法。

尝试删除架构 http://www.springframework.org/schema/data/mongo 并像这样直接定义 mongo bean：

<bean id="mongoAddress" class="com.mongodb.ServerAddress">
    <constructor-arg name="host" value="${MONGO_HOST}" />
    <constructor-arg name="port" value="${MONGO_PORT}" />
</bean>

<bean id="mongo" class="com.mongodb.Mongo">
    <constructor-arg name="addr" ref="mongoAddress" />
    <constructor-arg name="options" ref="mongoOptions"/>
</bean>


<bean id="mongoTemplate" class="org.springframework.data.mongodb.core.MongoTemplate">
     <constructor-arg index="0" ref="mongo" />
     <constructor-arg index="1" value="mydb" />
</bean>

这个解决方案对我来说很好。

【讨论】：

这不是spring-data连接方式！ @user1944413 写了正确答案