java - @Transactional 注释在 Spring MVC 中不起作用

Question

@Transactional is not working in spring mvc. suppose i removed @Transactional annotation data is reached to RepositoryClass. Throwable targetException - org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(Object...) i need to reach data to repository class.

请帮帮我，谢谢。

ServiceImplClass

   @Service("userService")
public class UserServiceImpl implements UserService{

    @Autowired
    UserRepository userRepository;

    public String saveUserData(User user,HttpSession session) {
        return userRepository.saveUserData(user);
    }
}

存储库类:

@Component
@Transactional
public class UserRepository {

@Autowired
protected SessionFactory sessionFactory;

public SessionFactory getSessionFactory() {
    return sessionFactory;
}

public void setSessionFactory(SessionFactory sessionFactory) {
    this.sessionFactory = sessionFactory;
}

public String saveUserData(User user) {

    final Session session = (Session) getSessionFactory();
    try {
        session.beginTransaction();
        Query query=session.createQuery("UPDATE User set user_Name =:userName,"
                + "reg_Date =:regDate,"
                + "img_Id=:imgId, emailId =:emailId");
        query.setParameter("userName", user.getUserName());
        query.setParameter("regDate", user.getRegDate());
        query.setParameter("imgId", user.getImgId());
        query.setParameter("emailId", user.getEmailId());
        session.save(user);
        session.getTransaction().commit();
    } catch (Exception e) {
        e.printStackTrace();
    }
    return null;
}

}

dispatcher-servlet.xml

  <?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:context="http://www.springframework.org/schema/context"
    xmlns:util="http://www.springframework.org/schema/util" xmlns:mvc="http://www.springframework.org/schema/mvc"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
                    http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
                    http://www.springframework.org/schema/context 
                    http://www.springframework.org/schema/context/spring-context-4.2.xsd
                    http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd
                    http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.2.xsd
                    ">

    <context:annotation-config />
    <context:component-scan base-package="com.demo.app" />
    <mvc:default-servlet-handler />
    <mvc:annotation-driven>
        <mvc:message-converters register-defaults="true">
            <bean class="org.springframework.http.converter.StringHttpMessageConverter">
                <property name="supportedMediaTypes" value="text/plain;charset=UTF-8" />
            </bean>
        </mvc:message-converters>
    </mvc:annotation-driven>

    <bean id="jspViewResolver"
        class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="viewClass"
            value="org.springframework.web.servlet.view.JstlView" />
        <property name="prefix" value="/WEB-INF/html/" />
        <property name="suffix" value="html" />
    </bean>

    <bean id="dataSource"
        class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver" />
        <property name="url" value="jdbc:mysql://localhost:3306/UserDB" />
        <property name="username" value="root" />
        <property name="password" value="password" />
    </bean>

    <bean id="sessionFactory"
        class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <property name="annotatedClasses">
            <list>
                <value>com.demo.app.model.User</value>
            </list>
        </property>
        <property name="hibernateProperties">
            <props>
                <prop key="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</prop>
                <prop key="hibernate.show_sql">true</prop>
                <prop key="hibernate.hbm2ddl.auto">update</prop>
            </props>
        </property>
    </bean>

    <tx:annotation-driven transaction-manager="transactionManager" />

    <bean id="transactionManager"
        class="org.springframework.orm.hibernate4.HibernateTransactionManager">
        <property name="sessionFactory" ref="sessionFactory" />
    </bean>
    <bean
        class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver">
        <property name="exceptionMappings">
            <props>
                <prop key="java.lang.Exception">Error</prop>
            </props>
        </property>
    </bean>
    <bean id="multipartResolver"
        class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
        <property name="maxUploadSize" value="2097152" />
    </bean>
</beans>

Answer 1

您正在手动管理您的交易。这是事务管理器的任务。 saveUserData 应该是这样的:

public User saveUserData(User user) {
    return (User)sessionFactory.getCurrentSession().merge(user);
}

就是这样。您可能希望使用 @Transactional 而不是存储库来注释您的服务。