在使用transaction时获取bean上的BeanCreationException

Question

<?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:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.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"
xmlns:tx="http://www.springframework.org/schema/tx">

    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="com.mysql.jdbc.Driver"/>
        <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/db"/>
        <property name="user" value="username"/>
    </bean>

    <bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <property name="configLocation">
            <value>classpath:hibernate.cfg.xml</value>
        </property>
        <property name="annotatedClasses">
            <list>
                <value>com.myprojects.User</value>
            </list>
        </property>
    </bean>

    <bean id="hibernateTemplate" class="org.springframework.orm.hibernate3.HibernateTemplate">
        <property name="sessionFactory" ref="sessionFactory"/>
    </bean>

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

    <bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
        <property name="sessionFactory" ref="sessionFactory" />
    </bean>

    <bean id="userService" class="com.myprojects.service">
        <property name="template" ref="hibernateTemplate"/>
    </bean>

</beans>

我是spring和hibernate的新手，当我在这里浏览spring事务管理文档时，我尝试实现了一个简单的基于事务的bean，就像上面的示例一样，但是在部署这个bean时，我得到了BeanCreationException。我是否缺少任何配置？

堆栈跟踪：

我有一个控制器，那里的服务是autowired：

@Controller
@RequestMapping("/user")
public class UserController {

    @Autowired
    private service s;

    //few methods like getUser/postUser are written here
}

@Transactional
public class service {
    private HibernateTemplate template;
    public void updateUser(User u) {
        Session session = template.getSessionFactory().getCurrentSession();
        u.update(session);
    }
}

public class User {
    public void updateUser(Session session) {
        Transaction tx = session.beginTransaction();
        try {
           //carry out update user
        } catch(Exception e) {
           tx.rollback();
        } finally {
           session.close();
        }
    }
}

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
  <session-factory>
    <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
    <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
    <property name="hibernate.connection.url">jdbc:mysql://localhost:3306/db</property>
    <property name="hibernate.connection.username">username</property>
    <property name="hibernate.current_session_context_class">thread</property>
  </session-factory>
</hibernate-configuration>

myProject-servlet.xml：

<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc" 
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="
    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/mvc
    http://www.springframework.org/schema/mvc/spring-mvc-3.0.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"
       xmlns:tx="http://www.springframework.org/schema/tx">

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

    <context:annotation-config/> 
    <tx:annotation-driven/>
    <mvc:annotation-driven/>

</beans>

web.xml：

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
    <context-param>
        <param-name>contextConfiguration</param-name>
        <param-value>/WEB-INF/applicationContext.xml</param-value>
    </context-param>

    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <servlet>
        <servlet-name>myproject</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>/WEB-INF/myproject-servlet.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>

    <servlet-mapping>
        <servlet-name>myproject</servlet-name>
        <url-pattern>/v1/*</url-pattern>
    </servlet-mapping>

</web-app>

Answer 1

由于服务是一个具体的类（而不是接口），因此可以将属性proxy-target-class=“true”添加到 ion-driven>

或者创建一个接口（其中service可以是一个具体的实现），并使用该接口进行自动跟踪/注入。

参考：Spring交易单据