Spring MVC MongoDB

Question

我在servlet-context.xmlSpring工具套件时出现以下错误：

元素bean bean的前缀bean未绑定错误位于以下行：http://www.springframework.org/schema/beans/spring-beans-3.0.xsd“”

顺便说一下，我正在尝试使用以下配置将Spring连接到MongoDB：

<?xml version="1.0" encoding="UTF-8"?>
<beans:bean xmlns="http://www.springframework.org/schema/beans"
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xmlns:context="http://www.springframework.org/schema/context"
          xmlns:mongo="http://www.springframework.org/schema/data/mongo"
          xsi:schemaLocation="http://www.springframework.org/schema/context
          http://www.springframework.org/schema/context/spring-context-3.0.xsd
          http://www.springframework.org/schema/data/mongo
          http://www.springframework.org/schema/data/mongo/spring-mongo-1.0.xsd
          http://www.springframework.org/schema/beans
          http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">


    <!-- DispatcherServlet Context: defines this servlet's request-processing infrastructure -->

    <!-- Enables the Spring MVC @Controller programming model -->
    <annotation-driven />

    <!-- Handles HTTP GET requests for /resources/** by efficiently serving up static resources in the ${webappRoot}/resources directory -->
    <resources mapping="/resources/**" location="/resources/" />

    <!-- Resolves views selected for rendering by @Controllers to .jsp resources in the /WEB-INF/views directory -->
    <beans:bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <beans:property name="prefix" value="/WEB-INF/views/" />
        <beans:property name="suffix" value=".jsp" />
    </beans:bean>

    <context:component-scan base-package="com.etvld.mvc" />

    <mongo:mongo host="192.168.1.19" port="27017"/>

</beans:beans>

Answer 1

下面是一个简单的mongo配置

@Configuration
public class SpringConfig {

    @Bean
    public MongoDbFactory mongoDbFactory() throws UnknownHostException{
        return new SimpleMongoDbFactory(new MongoClient(),"games");
    }

    @Bean
    public MongoTemplate mongoTemplate() throws UnknownHostException{
        MongoTemplate mongoTemplate = new MongoTemplate(mongoDbFactory());      
        return mongoTemplate;
    }

}

它使用注释，但这与您只需@Autowire mongoTemplate是一样的。

翻译成xml这看起来类似于或等于

    <beans:bean id="mongoClient" class="com.mongodb.MongoClient">
    </beans:bean>

<beans:bean id="mongoDbFactory" class="org.springframework.data.mongodb.core.SimpleMongoDbFactory">
      <constructor-arg ref="mongoClient"/>
      <constructor-arg type="java.lang.String" value="dbName"/>
   </beans:bean>

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

   </beans:bean>

还没有对xml进行测试，所以我可能遗漏了一些东西，

哦，正如另一个答案指出的那样，你正在把

希望有帮助

Answer 2

您的开始和结束标签不匹配，并且您忘记定义bean命名空间：

<?xml version="1.0" encoding="UTF-8"?>
<beans:bean ...>
       ^^^^ opening tag => bean
...    
</beans:beans>
    |   ^^^^^ ending tag => beans
    |
    + =====> Where did you define beans namespace?

因此，将第一行替换为以下内容：

<beans:beans xmlns:beans="http://www.springframework.org/schema/beans"

另外，添加mvc命名空间作为默认命名空间：

xmlns="http://www.springframework.org/schema/mvc"

您的servlet上下文。xml最终看起来是这样的：

<?xml version="1.0" encoding="UTF-8"?>
<beans:beans xmlns:beans="http://www.springframework.org/schema/beans"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xmlns:context="http://www.springframework.org/schema/context"
             xmlns:mongo="http://www.springframework.org/schema/data/mongo"
             xmlns="http://www.springframework.org/schema/mvc"
             xsi:schemaLocation="http://www.springframework.org/schema/context
          http://www.springframework.org/schema/context/spring-context-3.0.xsd
          http://www.springframework.org/schema/data/mongo
          http://www.springframework.org/schema/data/mongo/spring-mongo-1.0.xsd
          http://www.springframework.org/schema/beans
          http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
          http://www.springframework.org/schema/mvc
          http://www.springframework.org/schema/mvc/spring-mvc.xsd">


    <!-- DispatcherServlet Context: defines this servlet's request-processing infrastructure -->

    <!-- Enables the Spring MVC @Controller programming model -->
    <annotation-driven />

    <!-- Handles HTTP GET requests for /resources/** by efficiently serving up static resources in the ${webappRoot}/resources directory -->
    <resources mapping="/resources/**" location="/resources/" />

    <!-- Resolves views selected for rendering by @Controllers to .jsp resources in the /WEB-INF/views directory -->
    <beans:bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <beans:property name="prefix" value="/WEB-INF/views/" />
        <beans:property name="suffix" value=".jsp" />
    </beans:bean>

    <context:component-scan base-package="com.etvld.mvc" />

    <mongo:mongo host="192.168.1.19" port="27017"/>

</beans:beans>

如果你发现自己不喜欢使用Spring配置，我猜你会这样做，最好切换到Spring Boot，它会自动执行大部分此类配置。