java Spring 3.2 + Hibernate 4 OpenSessionInViewFilter

Spring 3.2 + Hibernate 4 OpenSessionInViewFilter

提问by user979051

I'm a Spring newbie trying my first app. My hibernate gets closed before the view is rendered and having problems with lazy loaded properties (expected behavior). I've added the OpenSessionInViewFilter to my web.xml and caused the following:

我是 Spring 新手，正在尝试我的第一个应用程序。我的休眠在渲染视图之前关闭，并且在延迟加载属性（预期行为）方面存在问题。我已将 OpenSessionInViewFilter 添加到我的 web.xml 并导致以下情况：

java.lang.IllegalStateException: No WebApplicationContext found: no ContextLoaderListener registered?

Beforehand It was working fine with the default servlet context config I've had (can someone tell me why?). So I've added the following:

事先它与我拥有的默认 servlet 上下文配置一起工作正常（有人能告诉我为什么吗？）。所以我添加了以下内容：

 <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>
            /WEB-INF/springapp-servlet.xml
    </param-value>
    </context-param>

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

The new error went away..but still getting a no session exception from hibernate

新错误消失了..但仍然从休眠中获得无会话异常

org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: com.test.model.Store.categories, could not initialize proxy - no Session

I've put a debug message in one of my controllers and it seems that its being initialized 3 times. Maybe I have more than one instance of hibernate session factory bean? My controller methods are marked @Transactional and everything worked until I've attempted to leave the session open to make the lazy fields available for the view.

我在我的一个控制器中放置了一条调试消息，它似乎被初始化了 3 次。也许我有不止一个休眠会话工厂 bean 的实例？我的控制器方法被标记为 @Transactional 并且一切正常，直到我试图让会话保持打开状态以使惰性字段可用于视图。

My full web.xml (with the new context addition, worked fine without it before I've added the hibernate filter):

我的完整 web.xml（添加了新的上下文，在我添加休眠过滤器之前没有它也能正常工作）：

<?xml version="1.0" encoding="ISO-8859-1"?>

<web-app version="2.4"
         xmlns="http://java.sun.com/xml/ns/j2ee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee 
         http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd" > 
    <display-name>
      Spring
    </display-name>
    <description>
     Spring Test
    </description>

    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>
            /WEB-INF/springapp-servlet.xml
    </param-value>
    </context-param>

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

   <filter>
      <filter-name>hibernateFilter</filter-name>
      <filter-class>org.springframework.orm.hibernate4.support.OpenSessionInViewFilter</filter-class>
      <init-param>
         <param-name>sessionFactoryBeanName</param-name>
         <param-value>sessionFactory</param-value>         
      </init-param>      
   </filter>

   <filter-mapping>
     <filter-name>hibernateFilter</filter-name>
    <url-pattern>/*</url-pattern>
    <dispatcher>REQUEST</dispatcher>
    <dispatcher>FORWARD</dispatcher>
   </filter-mapping> 

  <servlet>
    <servlet-name>springapp</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
  </servlet>



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

  <error-page>
    <error-code>500</error-code>
    <location>/error/500</location>
  </error-page>
   <error-page>
    <error-code>404</error-code>
    <location>/resources/pages/error.html</location>
  </error-page>



</web-app>

springapp-servlet.xml

springapp-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:context="http://www.springframework.org/schema/context"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xsi:schemaLocation="http://www.springframework.org/schema/mvc 
                    http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd
                    http://www.springframework.org/schema/beans 
                    http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
                    http://www.springframework.org/schema/context 
                    http://www.springframework.org/schema/context/spring-context-3.2.xsd
                    http://www.springframework.org/schema/tx
                   http://www.springframework.org/schema/tx/spring-tx-3.2.xsd
                   http://www.springframework.org/schema/aop
                   http://www.springframework.org/schema/aop/spring-aop-3.2.xsd">

    <context:component-scan base-package="com.test.web.controllers,com.test.service.impl" />

    <mvc:annotation-driven />
    <mvc:resources mapping="/resources/**" location="/resources/" /> 

    <bean id="myDataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
    <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
    <property name="url" value="jdbc:mysql://localhost:3306/test?zeroDateTimeBehavior=convertToNull"/>
    <property name="username" value="spring"/>
    <property name="password" value="test"/>
  </bean>

  <bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
    <property name="dataSource" ref="myDataSource"/>
    <property name="mappingLocations" value="classpath*:com/test/model/hbm/**/*.hbm.xml" />

    <property name="hibernateProperties">
      <value>
        hibernate.dialect=org.hibernate.dialect.MySQL5Dialect
        hibernate.show_sql=true
      </value>
    </property>
  </bean>

 <tx:annotation-driven />
  <bean id="transactionManager"
            class="org.springframework.orm.hibernate4.HibernateTransactionManager">
    <property name="sessionFactory" ref="sessionFactory"/>
  </bean>


    <bean id="velocityConfig" class="org.springframework.web.servlet.view.velocity.VelocityConfigurer">
        <property name="resourceLoaderPath" value="/WEB-INF/templates/"/>
    </bean>
    <bean id="viewResolver" class="org.springframework.web.servlet.view.velocity.VelocityLayoutViewResolver">
      <property name="cache" value="true"/>
      <property name="prefix" value=""/>
      <property name="suffix" value=".vm"/>
      <property name="layoutUrl" value="index.vm" />

      <!-- if you want to use the Spring Velocity macros, set this property to true -->
      <property name="exposeSpringMacroHelpers" value="true"/>

    </bean>

     <bean id="multipartResolver"
        class="org.springframework.web.multipart.commons.CommonsMultipartResolver">

        <!-- one of the properties available; the maximum file size in bytes -->
        <property name="maxUploadSize" value="10000000" />
    </bean>

    <bean id="validator" class="org.springframework.validation.beanvalidation.LocalValidatorFactoryBean" />

    <bean id="categoryDAO" class="com.test.dao.hibernate.HibernateCategoryDAO">
        <property name="sessionFactory" ref="sessionFactory"></property>
    </bean>
    <bean id="categoryService" class="com.test.service.Categories" scope="singleton">
        <property name="dao" ref="categoryDAO"></property>
    </bean>
    <bean id="storeDAO" class="com.test.dao.hibernate.HibernateStoreDAO">
        <property name="sessionFactory" ref="sessionFactory"></property>
    </bean>
    <bean id="storeService" class="com.test.service.Stores" scope="singleton">
        <property name="dao" ref="storeDAO"></property>
        <property name="categoryDao" ref="categoryDAO"></property>

    </bean>

</beans>

回答by user979051

My controllers where initialized twice, the same config was used by the root ApplicationContext and by the FrameworkServlet. I've had two contexts initialized. I've created a config for the root context named springapp.xml and moved all my middle tier configuration there and left my web tier configuration in springapp-servlet.xml

我的控制器初始化了两次，根 ApplicationContext 和 FrameworkServlet 使用了相同的配置。我已经初始化了两个上下文。我为名为 springapp.xml 的根上下文创建了一个配置，并将我所有的中间层配置移到那里，并将我的 Web 层配置留在 springapp-servlet.xml 中

My web.xml now looks like this and everything works fine:

我的 web.xml 现在看起来像这样，一切正常：

      <context-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>
                /WEB-INF/springapp.xml
        </param-value>
        </context-param>

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

<filter>
      <filter-name>hibernateFilter</filter-name>
      <filter-class>org.springframework.orm.hibernate4.support.OpenSessionInViewFilter</filter-class>
      <init-param>
         <param-name>sessionFactoryBeanName</param-name>
         <param-value>sessionFactory</param-value>         
      </init-param>      
   </filter>

   <filter-mapping>
     <filter-name>hibernateFilter</filter-name>
    <url-pattern>/*</url-pattern>
    <dispatcher>REQUEST</dispatcher>
    <dispatcher>FORWARD</dispatcher>
   </filter-mapping> 

    <servlet>
        <servlet-name>springapp</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
                <param-name>contextConfigLocation</param-name>
                <param-value>/WEB-INF/springapp-servlet.xml</param-value>
        </init-param>

        <load-on-startup>1</load-on-startup>
      </servlet>



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

回答by Mario Biasi

To solve the problem in my case it was just missing this line

为了解决我的问题，它只是缺少这一行

in the application-context file.

在应用程序上下文文件中。

The @Transactional annotation over a method was not taken into account.

未考虑方法上的 @Transactional 注释。

Hope it will help someone

希望它会帮助某人