Question

这是错误：引起：

org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of 
type [org.hibernate.SessionFactory] found for dependency: expected at least 1 bean 
which qualifies as autowire candidate for this dependency. Dependency annotations: 
{@org.springframework.beans.factory.annotation.Autowired(required=true)}

这是我的persistence-context.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"
    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">

    <!-- Datasource to connection management (http://commons.apache.org/dbcp/configuration.html)
     -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"
        destroy-method="close">
        <property name="driverClass" value="${datasource.mysql.driverClassName}" />
        <property name="jdbcUrl" value="${datasource.mysql.url}" />
        <property name="user" value="${datasource.mysql.username}" />
        <property name="password" value="${datasource.mysql.password}" />
        <property name="maxIdleTime" value="${datasource.mysql.maxIdle}" />
    </bean>

    <!-- Hibernate SessionFactory -->
    <bean id="sessionFactory"
        class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <property name="packagesToScan" value="br.com.mirian.martins.core.model" />
        <property name="hibernateProperties">
            <props>
                <prop key="hibernate.dialect">${hibernate.dialect}</prop>
                <prop key="hibernate.show_sql">${hibernate.show_sql}</prop>
                <prop key="hibernate.generate_statistics">${hibernate.generate_statistics}</prop>
                <prop key="hibernate.c3p0.timeout">${datasource.mysql.timeout}</prop>
                <prop key="hibernate.connection.release_mode">after_transaction</prop>
            </props>
        </property>
    </bean>

    <!-- Transaction manager for a single Hibernate SessionFactory -->
    <bean id="transactionManager"
        class="org.springframework.orm.hibernate3.HibernateTransactionManager"
        scope="prototype">
        <property name="sessionFactory" ref="sessionFactory" />
        <property name="defaultTimeout" value="120" />
    </bean>

    <bean id="transactionTemplate"
        class="org.springframework.transaction.support.TransactionTemplate">
        <property name="transactionManager" ref="transactionManager" />
    </bean>
</beans>

这是我的DAOImpl (generic)：

/**
 * Classe generica com metodos padroes utilizados na camada de persistencia
 * 
 * @param <T>
 * @param <ID>
 */
public class DAOImpl<T, ID extends Serializable>{

    private transient final Class<T> clazz;

    @Autowired
    private SessionFactory sessionFactory;

    @SuppressWarnings("unchecked")
    public DAOImpl() {
    this.clazz = (Class<T>) ((ParameterizedType) 
    getClass().getGenericSuperclass()).getActualTypeArguments()[0];
    }

    /**
     * SessionFactory injection
     * 
     * @param sessionFactory
     */
    public void setSessionFactory(SessionFactory sessionFactory) {
    this.sessionFactory = sessionFactory;
    }

    /**
     * Recupera a sessao corrente
     * 
     * @return sessao corrente
     */
    protected Session getSession() {
    return sessionFactory.getCurrentSession();
    }

    /**
     * Utiliza a sessao corrente para criar uma nova instancia de criteria
     * 
     * @return instancia de criteria
     */
    protected Criteria createCriteria() {
    return getSession().createCriteria(clazz);
    }

    /**
     * Utiliza a sessao corrente para criar uma nova query
     * 
     * @param hql
     * @return query
     */
    protected Query createQuery(String hql) {
    return getSession().createQuery(hql);
    }
}

这是我的controller：

@Controller
public class IndexController {

    @Autowired
    UserService userService;

    @RequestMapping(value = "/", method = RequestMethod.GET)
    public String index(HttpServletRequest request, HttpServletResponse response) {


    return "index";

    }

}

请，如果有人现在如何解决这个问题。感谢

Answer 1

在这里你会对两件事情感到困惑

JPA EntityManagerFactory

EntityManagerFactory和EntityManager。它们由JPA标准定义。
<强>的SessionFactory

SessionFactory和Session是特定于休眠的。

两者都有Pros＆amp;缺点，因为你使用SessionFactory（而不是JPA），你根本不应该使用persistence.xml。

JPA EntityManagerFactory

如果您想在JP中使用JPA，则需要将persistence.xml放入源文件夹中的META-INF文件夹中，并在LocalContainerEntityManagerFactory

applicationContext.xml

<bean id="emf" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
    <property name = "persistenceUnitName" value = "MyJPA" />
</bean>

然后，您可以使用EntityManager：

@PersistenceContext

@PersistenceContext
private EntityManager em;

<强>的persistence.xml

此文件通常包含与您的数据库相关的详细信息，例如连接字符串及其各自的用户名和密码包括其他ORM相关信息。可以放置这些细节在其他地方，所以你不需要明确地拥有一个，但是拥有这样的文件通常会产生所有与持久性相关的信息在一个地方提供查找某些设置和配置更容易。

<强>的SessionFactory

如果您想使用SessionFactory，则必须将sessionFactory bean声明为applicationContext.xml，如下所示

<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"
        destroy-method="close">
        <property name="driverClass" value="${datasource.mysql.driverClassName}" />
        <property name="jdbcUrl" value="${datasource.mysql.url}" />
        <property name="user" value="${datasource.mysql.username}" />
        <property name="password" value="${datasource.mysql.password}" />
        <property name="maxIdleTime" value="${datasource.mysql.maxIdle}" />
    </bean>

     <bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <property name="packagesToScan" value="com.edgeowt.entities"/>
        <property name="hibernateProperties">
            <props>
                <prop key="show_sql">${hibernate.show_sql}</prop>
                  <prop key="hibernate.dialect">${hibernate.dialect}</prop>
            </props>
        </property>
    </bean>

    <bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
        <property name="sessionFactory" ref="sessionFactory" />
    </bean>

然后，您可以使用SessionFactory

@Autowired

@Autowired
private SessionFactory sessionFactory;

希望这能帮助您解决问题...

Answer 2

您需要在DAO的顶部添加@Component（或类似的Spring注释）。您的web.xml中还有<context:annotation-config/>和<context:component-scan base-package="whatever"/>吗？你必须告诉Spring出去嗅探注释。

Answer 3

您必须在DAOImpl类的顶部添加@Repository（Spring注释）。此外，您必须插入<context:component-scan base-package="packageName"/>来扫描所有项目并在项目中找到mvn组件，并在spring配置中<mvc:annotation-driven />（以便使用spring注释），以便它可以理解您的spring注释。 / p>

SessionFactory Hibernate错误（Spring MVC项目）

3 个答案: