java - Spring MVC + MongoDB

Question

我在使用 Spring Tool Suite 的 servlet-context.xml 中遇到以下错误:

the prefix beans for element beans bean is not bound The error is at the line : http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">

顺便说一句，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

您的开始和结束标记不匹配，并且您忘记定义 beans 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"

此外，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-context.xml最终看起来像这样:

<?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>

如果您发现自己对使用 Spring 配置感到不舒服(我想您确实如此)，最好切换到 Spring Boot，它会自动执行大多数此类配置。