hibernate中Query的list和iterator区别(续)

<?xml version="1.0" encoding="UTF-8"?>
<ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../config/ehcache.xsd">
    <!--
    Subdirectories can be specified below the property e.g. java.io.tmpdir/one
    -->
    <diskStore path="java.io.tmpdir"/>

    <!--
    Mandatory Default Cache configuration. These settings will be applied to caches
    created programmtically using CacheManager.add(String cacheName)
    -->
    <defaultCache
         maxElementsInMemory="10000"
         eternal="false"
         timeToIdleSeconds="120"
         timeToLiveSeconds="120"
         overflowToDisk="true"
         maxElementsOnDisk="10000000"
         diskPersistent="false"
         diskExpiryThreadIntervalSeconds="120"
         memoryStoreEvictionPolicy="LRU"
     />
    
    <cache name="org.hibernate.cache.spi.UpdateTimestampsCache"
           maxElementsInMemory="5000" 
           eternal="true" 
           overflowToDisk="true" />
    <cache name="org.hibernate.cache.internal.StandardQueryCache"
           maxElementsInMemory="10000" 
           eternal="false" 
           timeToLiveSeconds="120"
           overflowToDisk="true" />    
          
</ehcache>

    <bean id="sessionFactory"
        class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
        <property name="dataSource">
            <ref bean="dataSource" />
        </property>
        <property name="hibernateProperties">
            <props>
                <prop key="hibernate.dialect">
                    org.hibernate.dialect.MySQLDialect
                </prop>
                <!-- 是否打印sql -->  
                <prop key="hibernate.show_sql">true</prop>
                <!-- 格式化sql 
                <prop key="hibernate.format_sql">true</prop>
                -->  
                <!-- 配置二级缓存 -->
                <prop key="hibernate.cache.use_second_level_cache">true</prop>
                <prop key="hibernate.cache.region.factory_class">org.hibernate.cache.EhCacheRegionFactory</prop>  
                <prop key="hibernate.net.sf.ehcache.configurationResourceName">ehcache.xml</prop>
                <!-- 开启查询时的二级缓存 -->
                <prop key="hibernate.cache.use_query_cache">true</prop>
            </props>
        </property>
        <property name="mappingResources">
            <list>
                <value>com/db/entity/User.hbm.xml</value>
            </list>
        </property>
    </bean>