SSH Hibernate4配置缓存无效

[南猿北蛰]

SSH 配置ehcache缓存无效，希望大家帮助一下，配置如下：

1.spring

	<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
		<property name="dataSource" ref="sysDataSource" />
		<property name="hibernateProperties">
			<props>
				<prop key="hibernate.dialect">${hibernate.dialect}</prop>
				<prop key="hibernate.show_sql">${hibernate.show_sql}</prop>
				<prop key="hibernate.format_sql">${hibernate.format_sql}</prop>
				<prop key="hibernate.current_session_context_class">org.springframework.orm.hibernate4.SpringSessionContext</prop>
				<prop key="cache.use_query_cache">true</prop>
				<prop key="hibernate.cache.use_second_level_cache">true</prop>
                <prop key="cache.use_structured_entries">true</prop>
      			<prop key="hibernate.cache.region.factory_class">org.hibernate.cache.ehcache.EhCacheRegionFactory</prop>
      			<prop key="net.sf.ehcache.configurationResourceName">ehcache.xml</prop>
      		
			</props>
		</property>
		<!--  按照包路径自动绑定hibernate实体 -->
		<property name="packagesToScan" value="com.bobo.app.model"></property>

	</bean>

2.ehcache配置

<?xml version="1.0" encoding="UTF-8"?>
<ehcache>
	<diskStore path="java.io.tmpdir" />
	<!--缓存最大数目  -->
	<!--缓存是否持久  -->
	<!--是否保存到磁盘，当系统当机时 -->
	<!--当缓存闲置 n 秒后销毁  -->
	<!--当缓存存活 n 秒后销毁  -->
	<defaultCache 
	    maxElementsInMemory="10000" 
		eternal="true" 
		overflowToDisk="true" 
		timeToIdleSeconds="300" 
		timeToLiveSeconds="600" 
		diskPersistent="false"
		diskExpiryThreadIntervalSeconds= "120" />

</ehcache>

3.实体配置

import javax.persistence.Cacheable;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;

import org.hibernate.annotations.Cache;
import org.hibernate.annotations.CacheConcurrencyStrategy;


@Entity
@Table(name = "student")
@Cacheable
@Cache(usage = CacheConcurrencyStrategy.READ_WRITE)
public class Student implements java.io.Serializable{

	private static final long serialVersionUID = 1L;
	
	private int id;
	private String name;
	private int age;
	private String sex;
        ...

4.测试结果，每次查询都有 sql打印，说明缓存失败

Hibernate:
select
student0_.id as id1_0_,
student0_.age as age2_0_,
student0_.name as name3_0_,
student0_.sex as sex4_0_
from
student student0_