Question

出于某种原因，除非我明确地刷新（），否则我无法通过休眠来保存我的对象。

我正在使用Spring MVC

执行保存的部分DAO

public final T saveOrUpdate(final T instance) {
    context.currentSession().saveOrUpdate(instance);
    context.currentSession().flush(); //TODO should not have to do this
    return instance;
}

web.xml文件的一部分，允许通过AJAX查看视图

<filter>
    <filter-name>Open Session In View Filter</filter-name>
    <filter-class>org.springframework.orm.hibernate4.support.OpenSessionInViewFilter</filter-class>
</filter>

<filter-mapping>
    <filter-name>Open Session In View Filter</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>

用于交易管理的弹簧配置的一部分

<context:property-placeholder location="classpath:environment.properties" />

<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
  <property name="driverClass" value="${hibernate.connection.driver_class}" />
  <property name="jdbcUrl" value="${hibernate.connection.url}" />
  <property name="user" value="${hibernate.connection.username}" />
  <property name="password" value="${hibernate.connection.password}" />
  <property name="initialPoolSize" value="5" />
  <property name="minPoolSize" value="5" />
  <property name="maxPoolSize" value="25" />
  <property name="acquireIncrement" value="5" />
  <property name="maxIdleTime" value="1800" />
  <property name="numHelperThreads" value="5" />
</bean>


<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
  <property name="dataSource" ref="dataSource" />
  <property name="entityInterceptor">
    <bean class="org.mycompany.persistence.AuditTrailInterceptor"/>
  </property>
  <property name="hibernateProperties">
    <props>
      <!-- Hibernate Tweak to enhance performance -->
      <prop key="hibernate.order_inserts">true</prop>
      <!-- Hibernate Tweak to enhance performance -->
      <prop key="hibernate.order_updates">true</prop> 

      <prop key="hibernate.dialect">${hibernate.dialect}</prop>
      <prop key="hibernate.transaction.factory_class">org.hibernate.transaction.JDBCTransactionFactory</prop>
      <prop key="hibernate.show_sql">true</prop>
    </props>
  </property>
  <property name="configLocation" value="classpath:hibernate.cfg.xml" />

  <!-- Enable mapping of annotated hibernate classes -->
  <property name="packagesToScan" value="org.mycompany" />

</bean>

<bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
    <property name="sessionFactory" ref="sessionFactory" />
</bean>

<tx:annotation-driven transaction-manager="transactionManager"/>

示例服务方法

@Service
@Transactional
class MyServiceImpl implements MyService {

...

    @Override
    public final void save(final MyObject obj) {
        myObjectDao.save(obj);
    }

Answer 1

结果是我的root-context.xml和servlet-context.xml之间的配置问题，我必须执行以下操作：

我必须将以下内容放在root-context.xml中：

<!-- Load everything except @Controllers -->
<context:component-scan base-package="my.package">
    <context:exclude-filter expression="org.springframework.stereotype.Controller" type="annotation"/>
</context:component-scan>

并在servlet-context.xml中：

<!-- Search this package for annotated Spring Beans -->
<!-- Load @Controllers only -->
<context:component-scan base-package="my.package" use-default-filters="false">
    <context:include-filter expression="org.springframework.stereotype.Controller" type="annotation"/>
</context:component-scan>

请注意，use-default-filters="false"很重要，而且我最初遇到了很多麻烦，似乎servlet正在从root-context.xml覆盖bean

Spring MVC - 必须手动flush（）才能获得保存对象

1 个答案: