Я новичок в Spring, и я пытался создать веб-приложение со следующим стеком: Apache Tomcat 7, MySQL, Spring MVC, Hibernate 3 с аннотациями JPA.
Я пытаюсь узнать, следуя инструкциямкнига «Весна в действии, третье издание» Крейга Уоллса.
Сначала я хотел создать страницу, отображающую некоторые записи, которые я вручную добавил в свою БД, но похоже, что мое приложение не способно создавать/ получение любой сессии Hibernate из моей SessionFactory.Вот моя трассировка стека первопричин:
exception
org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.hibernate.HibernateException: No Hibernate Session bound to thread, and configuration does not allow creation of non-transactional one here
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:656)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:549)
javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
root cause
org.hibernate.HibernateException: No Hibernate Session bound to thread, and configuration does not allow creation of non-transactional one here
org.springframework.orm.hibernate3.SpringSessionContext.currentSession(SpringSessionContext.java:63)
org.hibernate.impl.SessionFactoryImpl.getCurrentSession(SessionFactoryImpl.java:687)
com.nbarraille.www.dao.HibernateContactDAO.listContact(HibernateContactDAO.java:27)
com.nbarraille.www.controllers.HomeController.showHomePage(HomeController.java:24)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:613)
org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:176)
org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:426)
org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:414)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:790)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:719)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:549)
javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
А вот мои заинтересованные файлы классов / конфигурации:
Мой HibernateDAO:
@Repository
public class HibernateContactDAO implements ContactDAO {
private SessionFactory sessionFactory;
@Autowired
public HibernateContactDAO(SessionFactory sessionFactory){
this.sessionFactory = sessionFactory;
}
public void addContact(Contact contact) {
sessionFactory.getCurrentSession().save(contact);
}
public List<Contact> listContact() {
@SuppressWarnings("unchecked")
List<Contact> cl = sessionFactory.getCurrentSession().createQuery("from Contact").list();
return cl;
}
public void removeContact(Integer id) {
Contact contact = (Contact) sessionFactory.getCurrentSession().load(Contact.class, id);
if (null != contact) {
sessionFactory.getCurrentSession().delete(contact);
}
}
}
Мой класс контактов:
@Entity
@Table(name="contacts")
public class Contact implements Serializable {
private static final long serialVersionUID = -5389913432051078273L;
@Id
@Column(name="id")
@GeneratedValue
private int id;
@Column(name="first_name")
private String firstname;
@Column(name="last_name")
private String lastname;
@Column(name="email")
private String email;
@Column(name="telephone")
private String telephone;
// Setters/Getters
}
Мой класс контроллера:
@Controller
public class HomeController {
private ContactDAO contactDAO; // I know I should pass through a service instead of accessing my DAO directly, and I usually do, but I skipped it here to simplify and try to locate the problem
@Inject
public HomeController(ContactDAO contactDAO){
this.contactDAO = contactDAO;
}
@RequestMapping({"/", "/home"})
public String showHomePage(Map<String,Object> model){
model.put("contacts", contactDAO.listContact());
return "index";
}
}
Вот мой файл конфигурации данных контекста:
<bean id="DBpropertyConfigurer"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location" value="/WEB-INF/jdbc.properties" />
</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/nbarraille" />
<property name="username" value="root" />
<property name="password" value="password" />
</bean>
<bean id="sessionFactory"
class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="packagesToScan" value="com.nbarraille.www.core" />
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
<prop key="hibernate.show_sql">true</prop>
</props>
</property>
</bean>
<!-- Adds an advisor to any bean annotated with @Repository so that any platform-specific exception
are caught and then rethrown as one of Spring's unchecked data access exceptions -->
<bean class="org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor" />
Вот моя конфигурация сервлета диспетчера:
<mvc:resources mapping="/resources/**"
location="/resources/" />
<mvc:annotation-driven />
<context:component-scan base-package="com.nbarraille.www" />
<bean class="org.springframework.web.servlet.view.tiles2.TilesViewResolver" />
<bean class="org.springframework.web.servlet.view.tiles2.TilesConfigurer">
<property name="definitions">
<list>
<value>/WEB-INF/tiles-def.xml</value>
</list>
</property>
</bean>
<bean id="messageSource"
class="org.springframework.context.support.ReloadableResourceBundleMessageSource">
<property name="basename" value="classpath:messages" />
<property name="defaultEncoding" value="UTF-8"/>
</bean>
<bean id="localeChangeInterceptor"
class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor">
<property name="paramName" value="lang" />
</bean>
<bean id="localeResolver"
class="org.springframework.web.servlet.i18n.CookieLocaleResolver">
<property name="defaultLocale" value="en"/>
</bean>
И, наконец, вот мой файл web.xml:
<servlet>
<servlet-name>nbarraille</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>nbarraille</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>
/WEB-INF/nbarraille-service.xml
/WEB-INF/nbarraille-data.xml
/WEB-INF/nbarraille-security.xml
</param-value>
</context-param>