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我浪費了太多的時間在這，它的時間來問這裏，謝謝。Hibernate懶惰初始化例外與@Transactional
Frameworkds：4用SpringMVC + Hibernate的3.6.0
我期待什麼：顯示一個POJO（一對多）對象JSP頁面
我的配置
上1.applicationContext.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"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd">
<bean id="dataSource" class="org.logicalcobwebs.proxool.ProxoolDataSource">
<property name="driver" value="com.mysql.jdbc.Driver"/>
<property name="driverUrl" value="jdbc:mysql://localhost:3306/xxx"/>
<property name="user" value="-"/>
<property name="password" value="-"/>
<property name="maximumConnectionCount" value="10"/>
<property name="minimumConnectionCount" value="5"/>
</bean>
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
<property name="packagesToScan" value="com.test.pojo"/>
<property name="dataSource" ref="dataSource"/>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.hbm2ddl.auto">update</prop>
<!-- auto generate table -->
</props>
</property>
</bean>
</beans>
2.dispatcher-servlet.xml中
<?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"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:task="http://www.springframework.org/schema/task"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.1.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.1.xsd
http://www.springframework.org/schema/task
http://www.springframework.org/schema/task/spring-task-3.0.xsd">
<bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory" />
</bean>
<tx:annotation-driven transaction-manager="transactionManager" />
<task:annotation-driven />
<mvc:annotation-driven />
<context:component-scan base-package="com.test.module" />
<!--HandlerMapping-->
<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"/>
<!--HandlerAdapter-->
<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"/>
<!--ViewResolver -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass" value="org.springframework.web.servlet.view.JstlView" />
<property name="prefix" value="/views/" />
<property name="suffix" value=".jsp" />
</bean>
</beans>
3.Controller
@Transactional
@Controller
public class TESTS {
@Resource(name="sessionFactory")
private SessionFactory sessionFactory;
@RequestMapping("/hello")
public ModelAndView test(){
ModelAndView mv = new ModelAndView();
mv.setViewName("/hello");
mv.addObject("master", (Master) sessionFactory.getCurrentSession().createQuery("from Master where master_id = 1").uniqueResult());
return mv;
}
}
4.Pojos
public class Master {
@Id
@GeneratedValue
private Integer master_id;
private String master_name;
@OneToMany(fetch = FetchType.LAZY, mappedBy="master", cascade = CascadeType.ALL,orphanRemoval=true)
private List<Pet> pets;
}
public class Pet {
@Id
@GeneratedValue
private Integer id;
private String name;
@ManyToOne(fetch = FetchType.LAZY)
@JoinColumn(name = "master_id", nullable = false)
private Master master;
}
即使我把@Transnational註釋提前@Controller，我仍然可以」 t獲取寵物的信息，總是得到一個異常，表示'未能懶惰地初始化一個角色集合：com.test.pojo.Master.pets，沒有會話或會話被關閉'
請指教謝謝！