hibernate4 could not initialize proxy - no Session

原创
2014/09/15 09:50
阅读数 5.5K

        相关代码链接: http://git.oschina.net/alexgaoyh/alexgaoyh

        上周在编写hibernate4的相关代码的时候,出现异常 org.hibernate.LazyInitializationException: could not initialize proxy - no Session  网上出现最多的解决方案是  openSessionInViewFilter

        形如:

<!-- open session filter -->
    <filter>
        <filter-name>openSessionInViewFilter</filter-name>
        <filter-class>org.springframework.orm.hibernate4.support.OpenSessionInViewFilter</filter-class>
		<init-param>  
	        <param-name>singleSession</param-name>  
	        <param-value>true</param-value>  
	    </init-param>  
        <init-param>
            <param-name>sessionFactoryBeanName</param-name>
            <param-value>sessionFactory</param-value>
        </init-param>
    </filter>


    同时,也参与配置了另外一个参数:

    在stackoverflow 上面找到一篇介绍 使用了 hibernate.enable_lazy_load_no_trans 的处理,配置后解决了错误:

    

<bean id="sessionFactory"
		class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
		<property name="dataSource" ref="dataSource" />
		<property name="packagesToScan">
			<list>
				<value>com.alexgaoyh</value>
			</list>
		</property>
		<property name="hibernateProperties">
			<props>
				<prop key="javax.persistence.validation.mode">none</prop>
				<prop key="hibernate.dialect">${hibernate.dialect}</prop>
				<prop key="hibernate.show_sql">${hibernate.show_sql}</prop>
				<prop key="hibernate.format_sql">true</prop>
				<prop key="hibernate.hbm2ddl.auto">${hibernate.hbm2ddl.auto}</prop>
				<prop key="hibernate.query.substitutions">${hibernate.query.substitutions}</prop>
				<prop key="hibernate.default_batch_fetch_size">${hibernate.default_batch_fetch_size}</prop>
				<prop key="hibernate.max_fetch_depth">${hibernate.max_fetch_depth}</prop>
				<prop key="hibernate.generate_statistics">${hibernate.generate_statistics}</prop>
				<prop key="hibernate.bytecode.use_reflection_optimizer">${hibernate.bytecode.use_reflection_optimizer}</prop>
				<prop key="hibernate.enable_lazy_load_no_trans">true</prop>
			</props>
		</property>
	</bean>



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