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我是 Spring MVC 的初学者。我遇到了一个问题“没有为依赖找到类型为 [org.hibernate.SessionFactory] ​​的匹配 bean：预计至少有 1 个 bean 有资格作为此依赖的自动装配候选者。 ”并花费了很多时间。

我使用了 Maven 构建管理。我的项目有一个包含 2 个模块的项目：springcore (jar) 和 springmvc (web app)。而springmvc（web app）一直是依赖spring core。在模块 spring 核心中，我定义了所有包，例如 dom、dao、service 及其实现，我还在 src/main/resources 中定义了 applicationContext.xml 如下：

应用程序上下文.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:tx="http://www.springframework.org/schema/tx" 
       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-3.0.xsd
           http://www.springframework.org/schema/context
           http://www.springframework.org/schema/context/spring-context-3.0.xsd">

    <!-- Activates scanning of @Autowired -->
    <context:annotation-config />

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

    <bean id="propertyConfigurer"
         class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"
         p:location="classpath:jdbc" />

    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
            destroy-method="close" p:driverClassName="${jdbc.driverClassName}"
            p:url="${jdbc.databaseurl}" p:username="${jdbc.username}"                    p:password="${jdbc.password}" />

    <bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
            <property name="dataSource" ref="dataSource" />
            <property name="annotatedClasses">
                    <list>
                         <value>com.netvn.dom.Contact</value>
                    </list>
            </property>
            <property name="hibernateProperties">
        <props>
            <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
            <prop key="hibernate.max_fetch_depth">3</prop>
            <prop key="hibernate.jdbc.fetch_size">50</prop>
            <prop key="hibernate.jdbc.batch_size">10</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.hibernate3.HibernateTransactionManager">
         <property name="sessionFactory" ref="sessionFactory" />
    </bean>
</beans>

ContactDaoImpl.java

@Repository
public class ContactDaoImpl implements ContactDao {
    private Log log = LogFactory.getLog(ContactDaoImpl.class);

    @Autowired
    private SessionFactory sessionFactory;

    public List<Contact> listContact() {
        Session session = sessionFactory.getCurrentSession();
        Query q = session.createQuery("select g from Contact g order by id desc");
        List<Contact> contactList= q.list(); 
        return contactList; 
    }
}

ContactServiceImpl.java

@Service
@Transactional
public class ContactServiceImpl implements ContactService {

    @Autowired
    private ContactDao contactDao;

    @Transactional(propagation=Propagation.REQUIRED)
    public List<Contact> listContact(){
        return contactDao.listContact();
    }
}

在 springmvc （网络应用程序）中，我定义了 web.xml 和 dispatcher-servlet.xml

调度程序-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:mvc="http://www.springframework.org/schema/mvc"
    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/mvc 
                 http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
                 http://www.springframework.org/schema/context
                 http://www.springframework.org/schema/context/spring-context-3.0.xsd">
    <context:annotation-config />

    <mvc:annotation-driven />
    <context:component-scan base-package="com.netvn.dao" />
    <context:component-scan base-package="com.netvn.service" />
    <context:component-scan base-package="com.netvn.controller" />

    <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"
            p:prefix="/WEB-INF/jsp/" p:suffix=".jsp" />

 </beans>

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app 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_3_0.xsd"
version="3.0">
    <context-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>
                 classpath*:*.xml
             </param-value>
    </context-param>
    <servlet>
            <servlet-name>dispatcher</servlet-name>
            <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
            <load-on-startup>1</load-on-startup>
    </servlet>

    <servlet-mapping>
            <servlet-name>dispatcher</servlet-name>
            <url-pattern>/</url-pattern>
    </servlet-mapping>

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

当我尝试在 Tomcat 6.0 服务器中运行它时，这是我的问题

Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.hibernate.SessionFactory com.netvn.dao.impl.ContactDaoImpl.sessionFactory; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching 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)}
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:502)
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:84)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:282)
    ... 86 more
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [org.hibernate.SessionFactory] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoSuchBeanDefinitionException(DefaultListableBeanFactory.java:920)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:789)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:703)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:474)

有人可以告诉我，Web 应用程序上下文无法创建 SessionFactory 的原因是什么，或者当我配置 SessionFactory 时出现任何问题。

任何支持将不胜感激。

4

3 回答 3

1

一般来说，无论是您自己的库，类路径中都缺少配置/类。再次检查正确的导入和配置：

  1. 使用类路径扫描来自动检测实体类：
    <bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean"> <property name="dataSource" ref="dataSource"/> <property name="packagesToScan" value="test.package"/> </bean>

  2. 或最重要的：AnnotationSessionFactoryBean 类需要 Hibernate 3.2 或更高版本，具有 Java Persistence API 和 Hibernate Annotations 附加组件。

参考：https ://docs.spring.io/spring/docs/3.2.8.RELEASE/javadoc-api/org/springframework/orm/hibernate3/annotation/AnnotationSessionFactoryBean.html

于 2018-03-25T15:16:16.017 回答
0

尝试将您的应用程序上下文直接导入到 dispatcher-servlet.xml 中（它正在被正确加载），如下所示。

<import resource="classpath:WEB-INF/applicationContext.xml" />

于 2016-01-05T15:05:12.053 回答
0

您的 sessionfactory 未正确初始化。

阅读你的错误在哪里以及什么被抛出。这是

无法自动装配字段：私有 org.hibernate.SessionFactory

您需要正确初始化 SessionFactory

现在如何测试它非常简单。首先删除代码中添加的 sessionfactory。测试数据源是否正确初始化

将数据源添加为自动装配。@Autowired DataSource 数据源；

在您的方法中，您可以轻松地执行 dataSource.getConnection。如果您能够使用普通的 jdbc 进行测试，那么您就更近了一步。

如果您的数据源配置正确，您可以在第二步中测试您的 sessionfactory。

我认为 conext 扫描不会给您带来任何问题，因为它说自动连线失败。因此，您的数据源和 sessionfactory bean 未在 xml 中正确设置

于 2016-10-12T19:50:34.587 回答