我是使用 mongo DB 的 Spring MVC 新手。我之前使用传统数据库(Postgresql-JDBC 模板)创建了 Spring MVC 应用程序。自 1 周以来，我在配置 MongoDB bean 后在我的项目中遇到了问题。

我创建了一个工作正常的 spring MVC 应用程序。现在我需要将我的数据保存到 MongoDB(MongoDB shell 版本:3.2.9)，

所以我下载了相关的jar，所以请检查我的依赖版本(我试过maven但也显示错误)。

 mongodb-version - 3.2.9
 Spring mvc version - 4.2.5.RELEASE
 mongo-java-driver  - 3.4.1
 spring-data-commons -2.0.0.M1
 spring-data-mongodb -2.0.0.M1
 slf4j-log4j12-1.7.22.jar
 log4j-slf4j-impl-2.0.jar
 Tomcat v8.0 Server at localhost
 java 8
 Dynamic Web Module 3.1

IDE - Eclipse 火星

我将所有 jar 保存在 WEB-INF/lib 文件夹中 在这里我想给我的spring-dispatcher-servlet

 <?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:context = "http://www.springframework.org/schema/context"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:beans="http://www.springframework.org/schema/beans"
       xmlns:p="http://www.springframework.org/schema/p"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:mongo="http://www.springframework.org/schema/data/mongo"
       xsi:schemaLocation="http://www.springframework.org/schema/beans 
       http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
       http://www.springframework.org/schema/context 
       http://www.springframework.org/schema/context/spring-context.xsd
       http://www.springframework.org/schema/mvc
       http://www.springframework.org/schema/mvc/spring-mvc.xsd
       http://www.springframework.org/schema/data/mongo
       http://www.springframework.org/schema/data/mongo/spring-mongo.xsd">

<context:annotation-config />
<context:component-scan base-package="com.classes.controller">
</context:component-scan>
<mvc:annotation-driven/>

 <mvc:resources mapping="/resources/**" location="/resources/" />

<mongo:mongo host="localhost" port="27017"/>
<mongo:db-factory dbname="dbfriendbook" />

<bean id="mongoTemplate" class="org.springframework.data.mongodb.core.MongoTemplate">
    <constructor-arg ref="mongoDbFactory" />
</bean>

<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix">
            <value>/view/</value>
        </property>
        <property name="suffix">
            <value>.jsp</value>
        </property>
</bean>

<beans:bean id="multipartResolver"
    class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
    <beans:property name="maxUploadSize" value="1000000" />
</beans:bean>

</beans>

这是我的 applicationContext.xml

 <?xml version="1.0" encoding="UTF-8"?>
 <beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:context = "http://www.springframework.org/schema/context"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:p="http://www.springframework.org/schema/p"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xsi:schemaLocation="http://www.springframework.org/schema/beans 
       http://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/context 
       http://www.springframework.org/schema/context/spring-context.xsd
       http://www.springframework.org/schema/mvc
       http://www.springframework.org/schema/mvc/spring-mvc.xsd">

   <context:component-scan base-package="com.classes.controller">
    <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan> 
</beans>

和我的web.xml如下

 <?xml version="1.0" encoding="UTF-8"?>
 <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
      xmlns="http://java.sun.com/xml/ns/javaee" 
      xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
      http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID"
     version="3.0">
<display-name>RealWorldContest</display-name>
   <!-- <welcome-file-list>
           <welcome-file>main_home.jsp</welcome-file>
        </welcome-file-list>-->

  <display-name>Real World Contest</display-name>
     <servlet>
        <servlet-name>spring-dispatcher</servlet-name>
        <servlet-class>
           org.springframework.web.servlet.DispatcherServlet
        </servlet-class>
     </servlet>
   <servlet-mapping>
      <servlet-name>spring-dispatcher</servlet-name>
       <url-pattern>
         /
      </url-pattern>
    </servlet-mapping>
     <listener>
      <listener- class>org.springframework.web.context.ContextLoaderListener</listener-class>
      </listener>

   </web-app>

我在下面给出的初始化服务器期间得到堆栈跟踪

 SEVERE: Context initialization failed
 org.springframework.beans.factory.BeanDefinitionStoreException: Unexpected exception parsing XML document from ServletContext resource [/WEB-INF/spring-dispatcher-servlet.xml]; nested exception is org.springframework.beans.FatalBeanException: Invalid NamespaceHandler class [org.springframework.data.mongodb.repository.config.MongoRepositoryConfigNamespaceHandler] for namespace [http://www.springframework.org/schema/data/mongo]: problem with handler class file or dependent class; nested exception is java.lang.NoClassDefFoundError: org/slf4j/LoggerFactory
at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:414)
at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:336)
at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:304)
at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:181)
at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:217)
at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:188)
at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:125)
at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:94)
at org.springframework.context.support.AbstractRefreshableApplicationContext.refreshBeanFactory(AbstractRefreshableApplicationContext.java:129)
at org.springframework.context.support.AbstractApplicationContext.obtainFreshBeanFactory(AbstractApplicationContext.java:609)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:510)
at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:667)
at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:633)
at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:681)
at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:552)
at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:493)
at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:136)
at javax.servlet.GenericServlet.init(GenericServlet.java:158)
at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1238)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1151)
at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:828)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:135)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:528)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1099)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:672)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1520)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1476)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Unknown Source)


 Caused by: org.springframework.beans.FatalBeanException: Invalid NamespaceHandler class [org.springframework.data.mongodb.repository.config.MongoRepositoryConfigNamespaceHandler] for namespace [http://www.springframework.org/schema/data/mongo]: problem with handler class file or dependent class; nested exception is java.lang.NoClassDefFoundError: org/slf4j/LoggerFactory
at org.springframework.beans.factory.xml.DefaultNamespaceHandlerResolver.resolve(DefaultNamespaceHandlerResolver.java:140)
at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1406)
at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1401)
at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.parseBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:168)
at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.doRegisterBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:138)
at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.registerBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:94)
at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.registerBeanDefinitions(XmlBeanDefinitionReader.java:508)
at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:392)
... 36 more


 Caused by: java.lang.NoClassDefFoundError: org/slf4j/LoggerFactory
at org.springframework.data.repository.config.RepositoryConfigurationExtensionSupport.<clinit>(RepositoryConfigurationExtensionSupport.java:50)
at org.springframework.data.mongodb.repository.config.MongoRepositoryConfigNamespaceHandler.init(MongoRepositoryConfigNamespaceHandler.java:37)
at org.springframework.beans.factory.xml.DefaultNamespaceHandlerResolver.resolve(DefaultNamespaceHandlerResolver.java:131)
... 43 more

 Caused by: java.lang.ClassNotFoundException: org.slf4j.LoggerFactory
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1305)
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1139)
... 46 more

我发现了很多与此相关的问题，但每个人都使用不同版本的 spring，大多数使用 Spring 3.x 版本。

我试过 3.x 版本，但我再次发现 jar 版本问题。我尝试了 maven，但当时我的项目中发生了 servlet 生命周期异常。我想使用 spring MVC 4.2.5 因为我之前完成了一个以 psql 作为 DB 和 SpringJdbcTemplate 作为依赖项的项目。如果我得到 Spring 4.2.5 版本的解决方案，我会更高兴。

我还想了解 LoggerFactory 及其在 MongoDB spring 项目中的需求。如果有人遇到问题，请告诉我。提前致谢

最佳答案

我以前遇到过同样的问题，请你试试这些maven依赖项好吗

 <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-core</artifactId>
    <version>4.2.5.RELEASE</version>
</dependency>

<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-context</artifactId>
    <version>4.2.5.RELEASE</version>
</dependency>

<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-web</artifactId>
    <version>4.2.5.RELEASE</version>
</dependency>

<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webmvc</artifactId>
    <version>4.2.5.RELEASE</version>
</dependency>

<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-aop</artifactId>
    <version>4.2.5.RELEASE</version>
</dependency>

<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-tx</artifactId>
    <version>4.2.5.RELEASE</version>
</dependency>

<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-aspects</artifactId>
    <version>4.2.5.RELEASE</version>
</dependency>
<dependency>
    <groupId>org.springframework.data</groupId>
    <artifactId>spring-data-mongodb</artifactId>
    <version>1.8.2.RELEASE</version>
</dependency>

<dependency>
    <groupId>org.springframework.data</groupId>
    <artifactId>spring-data-commons</artifactId>
    <version>1.10.0.RELEASE</version>
</dependency>

<dependency>
    <groupId>org.mongodb</groupId>
    <artifactId>mongo-java-driver</artifactId>
<version>3.4.1</version>
</dependency>

关于Spring mvc 4.2.5 在为 mongodb 配置 spring 数据后显示没有类防御发现异常，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/41951119/