Spring“未绑定元素"tx:annotation-driven”的前缀"tx“。”

Question

我在"tx:annotation-driven“行得到了上面的错误，但是我在bean文件的顶部声明了名称空间，为什么下面的XML会导致这个错误？

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

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

    <!-- Enables the Spring MVC @Controller programming model -->
    <tx:annotation-driven transaction-manager="hibernateTransactionManager"/>

    <!-- 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>

    <beans:bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
        destroy-method="close">
        <beans:property name="driverClassName" value="com.mysql.jdbc.Driver" />
        <beans:property name="url" value="jdbc:mysql://localhost/assessme" />
        <beans:property name="username" value="assessme" />
        <beans:property name="password" value="assessme" />
    </beans:bean>

     <beans:bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
    <beans:property name="annotatedClasses">
        <beans:list>
            <beans:value>org.assessme.com.entity.User</beans:value>
        </beans:list>
    </beans:property>
        <beans:property name="dataSource" ref="dataSource" />
        <beans:property name="packagesToScan" value="org.assessme.com.controller.entity" />
        <beans:property name="hibernateProperties">
            <beans:props>
                <beans:prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</beans:prop>
                <beans:prop key="hibernate.transaction.factory_class">org.hibernate.transaction.JDBCTransactionFactory</beans:prop>
                <beans:prop key="hibernate.show_sql">true</beans:prop>
                <beans:prop key="hibernate.hbm2ddl.auto">update</beans:prop>
            </beans:props>
        </beans:property>
    </beans:bean>

    <context:component-scan base-package="org.assessme.com." />

    <beans:bean class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver">
        <beans:property name="mediaTypes">
            <beans:map>
                <beans:entry key="html" value="text/html" />
                <beans:entry key="json" value="application/json" />
            </beans:map>
        </beans:property>
        <beans:property name="defaultViews">
            <beans:list>
                <beans:bean
                    class="org.springframework.web.servlet.view.json.MappingJacksonJsonView">
                    <beans:property name="prefixJson" value="true" />
                </beans:bean>
            </beans:list>
        </beans:property>
    </beans:bean>
<beans:bean id="hibernateTransactionManager"
        class="org.springframework.orm.hibernate3.HibernateTransactionManager">
        <beans:property name="sessionFactory" ref="sessionFactory" />
    </beans:bean>

</beans:beans>

Answer 1

就像其他xmlns:定义一样，您需要一个用于xmlns:tx的定义

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

Answer 2

您可以在here上查找更多信息：

的tx标签负责在Spring对事务的全面支持中配置所有这些bean。这些标记在第9章-事务管理一章中有介绍。

..。

为了完整起见，要使用tx模式中的标记，您需要在Spring XML配置文件的顶部具有以下前言；以下代码段中加粗的文本引用了正确的模式，以便您可以使用tx名称空间中的标记。

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xsi:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.0.xsd">

   <!-- <bean> definitions goes here -->

</beans>

Answer 3

你必须在你的项目中引入注解tx，你必须安装它们，不要使用xmlns，它不能正常工作，我看到你是用注解开发的，它是一个很好的实践，并使用这个，

http://www.springframework.org/schema/tx

http://www.springframework.org/schema/tx/spring-tx.xsd