我正在使用 springframework 3.2 和 jboss server 7.1 。尝试使用 jpa2(hibernate provider, mysql) 和 spring mvc 设置一个简单的 spring 应用程序。
我使用了一个简单的 DAO，我在家庭控制器中注入了自动装配注释。这个 dao 类只是有一个用于注入 persistentContext 的字段（em），它可能更简单，我不使用persistence.xml，因为从 3.1 版及更高版本的 spring 不需要......请注意，包被扫描正确地，我已经尝试了网络上发布的其他解决方案的所有内容（包括这里）......但我收到了这个错误：
org.springframework.beans.factory.BeanCreationException：无法自动装配字段：com.stko.home.model.daos.UserDao com.stko.home.controllers.HomeController.userDao; 嵌套异常是 org.springframework.beans.factory.BeanCreationException：创建名为“userDao”的 bean 时出错：注入持久性依赖项失败；嵌套异常是 org.springframework.beans.factory.NoSuchBeanDefinitionException：没有定义类型 [javax.persistence.EntityManagerFactory] 的唯一 bean：预期单个 bean 但找到 0：org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject (AutowiredAnnotationBeanPostProcessor.java:514) org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87) org.springframework.beans.factory。
我的 applicationContext.xml：
<bean class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close" id="dataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://localhost:3306/mmydb"/>
<property name="username" value="user"/>
<property name="password" value="1234"/>
</bean>
<bean class="org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor" />
<bean id="entityManagerFactory"
class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean" >
<property name="dataSource" ref="dataSource"/>
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"/>
</property>
<property name="packagesToScan" value="com.stko.home.model.entities"/>
<property name="jpaProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQL5InnoDBDialect</prop>
<prop key="hibernate.max_fetch_depth">3</prop>
<prop key="hibernate.show.sql">true</prop>
<prop key="hibernate.connection.charSet"> UTF-8</prop>
</props>
</property>
</bean>
<!-- tell spring to use annotation based congfigurations -->
<context:annotation-config />
<!-- scan for beans -->
<context:component-scan base-package="com.stko.home.model.daos"/>
<!-- to recognize persistnce annotations like PersistenceContext -->
<bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor"/>
<tx:annotation-driven transaction-manager="transactionManager" />
<bean id="databaseProperties" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location" value="classpath:database.properties"/>
</bean>
我的 servlet-context.xml：
<!-- Enables the Spring MVC @Controller programming model -->
<annotation-driven />
<!-- 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>
<context:component-scan base-package="com.stko.home"/>
我的 web.xml：
<!-- The definition of the Root Spring Container shared by all Servlets and Filters -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring/root-context.xml</param-value>
</context-param>
<!-- Creates the Spring Container shared by all Servlets and Filters -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- Processes application requests -->
<servlet>
<servlet-name>appServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring/appServlet/servlet-context.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>appServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
我的用户道：
@Service("userDao")
@Repository
public class UserDao implements Serializable {
@PersistenceContext
private EntityManager em;
@Transactional
public void saveUser(User user) {
if(user!=null)
em.persist(user);
}
}
我的实体类用户：
@Entity
@Table(name = "user")
public class User implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Column(name = "userid")
private Integer userid;
@Column(name="username")
private String username;
public User(){}
}
我典型的家庭控制器：
@Controller
public class HomeController {
.....
@Autowired
UserDao userDao;
@RequestMapping(value = "/", method = RequestMethod.GET)
public String home(Locale locale, Model model) {
.....
User newUser = new User();
newUser.setName("blabla");
userDao.saveUser(newUser);
return "home";
}
}