使用spring管理hibernate lazy缓存

web配置
<filter>
		<filter-name>OpenSessionInView</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>
	</filter>
	<filter-mapping>
		<filter-name>OpenSessionInView</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>

web配置
<filter>
		<filter-name>OpenSessionInView&l