Hibernate+EhCache配置二级缓存
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本文主要讲一讲Hibernate+EhCache配置二级缓存的基本使用方法，主要分以下两个方面介绍：
(有关EhCache的基础介绍可参见：http://sjsky.iteye.com/blog/1288257 )
- Cache的多种配置方法
- Hibernate+EhCache集成demo
[一]、Cache的多种配置方法
Javabean cache的配置有三种，下面将一一介绍,具体如下：：
(1).bean中注解配置的方式： @Cache(usage = CacheConcurrencyStrategy.READ_WRITE)
(2).hibernate.cfg.xml中标签配置方式：
(3).映射文件*.hb.xml中标签配置方式：
2.hibernate配置文件：hibernate.cfg.xml
oracle.jdbc.driver.OracleDriver jdbc:oracle:thin:@localhost:1521:ora11g mytest 111111 org.hibernate.dialect.Oracle9Dialect true UTF-8 true 10 10 true false thread update net.sf.ehcache.hibernate.SingletonEhCacheProvider true true
3.相关javabean代码片段如下：
(1).hibernate.cfg.xml中
/**
* @blog http://sjsky.iteye.com
* @author Michael
*/
@Entity
@Table(name = "MY_TB_EH_BLOG_TOPIC")
public class EhBlogTopic implements Serializable {
/**
* serialVersionUID
*/
private static final long serialVersionUID = -570936907944909799L;
private Integer id;
private String userId;
private String topic;
private String site;
//其他省略
}(2). bean中注解的方式配置cache的：EhBlogTopic2.java
/**
* @blog http://sjsky.iteye.com
* @author Michael
*/
@Entity
@Table(name = "MY_TB_EH_BLOG_TOPIC2")
@Cache(usage = CacheConcurrencyStrategy.READ_WRITE)
public class EhBlogTopic2 implements Serializable {
//属性和EhBlogTopic一样
//其他省略
}(3). 映射文件*.hb.xml中添加cache标签的： EhBlogTopic3.java
/**
* @blog http://sjsky.iteye.com
* @author Michael
*/
public class EhBlogTopic3 implements Serializable {
//属性和EhBlogTopic一样
//其他省略
}tb_EhBlogTopic3.hb.xml
(4). 没有配置cache的bean:EhUserInfo.java
/**
* @blog http://sjsky.iteye.com
* @author Michael
*/
@Entity
@Table(name = "MY_TB_EH_USER_INFO")
public class EhUserInfo implements Serializable {
/**
* serialVersionUID
*/
private static final long serialVersionUID = 930384253681679239L;
private Integer id;
private String userId;
private String userName;
private String otherInfo;
/**
* @return the id
*/
@Id
@GeneratedValue
@Column(name = "ID")
public Integer getId() {
return id;
}
//其他省略。。。
}4.测试运行代码如下：
package michael.cache.ehcache.hibernate;
import java.util.List;
import michael.hibernate.bigstring.oracle.BigStrBlob;
import net.sf.ehcache.Cache;
import net.sf.ehcache.CacheManager;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.AnnotationConfiguration;
import org.hibernate.cfg.Configuration;
/**
*
* @blog http://sjsky.iteye.com
* @author Michael
*/
public class TestEhcacheHibernate {
/**
* @param args
*/
@SuppressWarnings("unchecked")
public static void main(String[] args) {
testMulitConfigMethod();
}
/**
* 测试多种配置缓存的方法
*/
public static void testMulitConfigMethod() {
SessionFactory sessionFactory = null;
try {
System.out.println("ehcache - hibernate Test ...");
Configuration config = new AnnotationConfiguration()
.configure("michael/cache/ehcache/hibernate/hibernate.cfg.xml");
System.out.println("hibernate config successful :" + config);
sessionFactory = config.buildSessionFactory();
Transaction ta = null;
try {
Session session = sessionFactory.getCurrentSession();
ta = session.beginTransaction();
} catch (Exception e) {
e.printStackTrace();
ta.rollback();
}
String[] cacheNames = CacheManager.getInstance().getCacheNames();
System.out.println("缓存的key cacheNames length := "
+ cacheNames.length + " 具体详细列表如下：");
for (String name : cacheNames) {
System.out.println("name := " + name);
}
} catch (Exception e) {
e.printStackTrace();
}
System.out.println("ehcache - hibernate Test end.");
}
}运行结果如下：
ehcache - hibernate Test ...
hibernate config successful :org.hibernate.cfg.AnnotationConfiguration@193c0cf
2011-12-15 11:32:36 net.sf.ehcache.hibernate.AbstractEhcacheProvider buildCache
警告: Could not find a specific ehcache configuration for cache named [michael.cache.ehcache.hibernate.EhBlogTopic]; using defaults.
2011-12-15 11:32:36 net.sf.ehcache.hibernate.AbstractEhcacheProvider buildCache
警告: Could not find a specific ehcache configuration for cache named [michael.cache.ehcache.hibernate.EhBlogTopic2]; using defaults.
2011-12-15 11:32:36 net.sf.ehcache.hibernate.AbstractEhcacheProvider buildCache
警告: Could not find a specific ehcache configuration for cache named [michael.cache.ehcache.hibernate.EhBlogTopic3]; using defaults.
2011-12-15 11:32:37 net.sf.ehcache.util.UpdateChecker doCheck
信息: New update(s) found: 2.4.6 [http://www.terracotta.org/confluence/display/release/Release+Notes+Ehcache+Core+2.4]. Please check http://ehcache.org for the latest version.
缓存的key cacheNames length := 7 具体详细列表如下：
name := sampleCache2
name := michael.cache.ehcache.hibernate.EhBlogTopic2
name := org.hibernate.cache.UpdateTimestampsCache
name := sampleCache1
name := michael.cache.ehcache.hibernate.EhBlogTopic
name := org.hibernate.cache.StandardQueryCache
name := michael.cache.ehcache.hibernate.EhBlogTopic3
ehcache - hibernate Test end.
hibernate config successful :org.hibernate.cfg.AnnotationConfiguration@193c0cf
2011-12-15 11:32:36 net.sf.ehcache.hibernate.AbstractEhcacheProvider buildCache
警告: Could not find a specific ehcache configuration for cache named [michael.cache.ehcache.hibernate.EhBlogTopic]; using defaults.
2011-12-15 11:32:36 net.sf.ehcache.hibernate.AbstractEhcacheProvider buildCache
警告: Could not find a specific ehcache configuration for cache named [michael.cache.ehcache.hibernate.EhBlogTopic2]; using defaults.
2011-12-15 11:32:36 net.sf.ehcache.hibernate.AbstractEhcacheProvider buildCache
警告: Could not find a specific ehcache configuration for cache named [michael.cache.ehcache.hibernate.EhBlogTopic3]; using defaults.
2011-12-15 11:32:37 net.sf.ehcache.util.UpdateChecker doCheck
信息: New update(s) found: 2.4.6 [http://www.terracotta.org/confluence/display/release/Release+Notes+Ehcache+Core+2.4]. Please check http://ehcache.org for the latest version.
缓存的key cacheNames length := 7 具体详细列表如下：
name := sampleCache2
name := michael.cache.ehcache.hibernate.EhBlogTopic2
name := org.hibernate.cache.UpdateTimestampsCache
name := sampleCache1
name := michael.cache.ehcache.hibernate.EhBlogTopic
name := org.hibernate.cache.StandardQueryCache
name := michael.cache.ehcache.hibernate.EhBlogTopic3
ehcache - hibernate Test end.
从运行结果可见：三种方式的缓存配置都已经成功。
[二]、Hibernate+EhCache集成demo
1.分别初始化EhUserInfo（没有配置cache的）和EhBlogTopic（配置过cache的）数据如下：
EhUserInfo：
EhBlogTopic： 
2.演示代码：
package michael.cache.ehcache.hibernate;
import java.util.List;
import michael.hibernate.bigstring.oracle.BigStrBlob;
import net.sf.ehcache.Cache;
import net.sf.ehcache.CacheManager;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.AnnotationConfiguration;
import org.hibernate.cfg.Configuration;
/**
*
* @blog http://sjsky.iteye.com
* @author Michael
*/
public class TestEhcacheHibernate {
/**
* @param args
*/
@SuppressWarnings("unchecked")
public static void main(String[] args) {
SessionFactory sessionFactory = null;
try {
System.out.println("ehcache - hibernate Test ...");
Configuration config = new AnnotationConfiguration()
.configure("michael/cache/ehcache/hibernate/hibernate.cfg.xml");
sessionFactory = config.buildSessionFactory();
System.out.println("buildSessionFactory===============");
System.out.println("====================================");
System.out.println("session open ....");
System.out.println("同一个session(一级缓存默认的)中，没有配置cache的Bean");
Transaction ta = null;
try {
Session session = sessionFactory.getCurrentSession();
String hsql = "select t from EhUserInfo t ";
ta = session.beginTransaction();
Query query = session.createQuery(hsql);
System.out.println("查询全部query.list().size:"
+ query.list().size());
System.out.println("再根据ID=1查询某记录时不会再去查数据库,故不会打印hsql");
EhUserInfo vo1 = (EhUserInfo) session.get(EhUserInfo.class, 1);
System.out.println("根据ID=1找到的记录:" + vo1);
ta.commit();
} catch (Exception e) {
e.printStackTrace();
ta.rollback();
}
System.out.println("session closed.");
System.out.println("session open ....");
try {
Session session = sessionFactory.getCurrentSession();
ta = session.beginTransaction();
System.out.println("第一次根据ID=1查询某记录时,会打印hsql");
EhUserInfo vo1 = (EhUserInfo) session.get(EhUserInfo.class, 1);
System.out.println("根据ID=1找到的记录:" + vo1);
ta.commit();
} catch (Exception e) {
e.printStackTrace();
ta.rollback();
}
System.out.println("session closed.");
System.out.println("====================================");
System.out.println("当前同一个sessionFactory，没有配置cache的Bean,");
System.out.println("session open ....");
try {
Session session = sessionFactory.getCurrentSession();
ta = session.beginTransaction();
System.out.println("第一次根据ID=1查询记录时会再去查数据库,故打印hsql如下：");
EhUserInfo vo1 = (EhUserInfo) session.get(EhUserInfo.class, 1);
System.out.println("根据ID=1找到的记录:" + vo1);
ta.commit();
} catch (Exception e) {
e.printStackTrace();
ta.rollback();
}
System.out.println("session closed.");
System.out.println("====================================");
String[] cacheNames = CacheManager.getInstance().getCacheNames();
System.out.println("缓存的key cacheNames length := "
+ cacheNames.length);
for (String name : cacheNames) {
System.out.println("name := " + name);
}
System.out.println("====================================");
System.out.println("同一个session(一级缓存默认的)中，配置cache的Bean");
System.out.println("session open ....");
try {
Session session = sessionFactory.getCurrentSession();
String hsql = "select t from EhBlogTopic t ";
ta = session.beginTransaction();
Query query = session.createQuery(hsql);
query.setCacheable(true);
System.out.println("查询全部query.list().size:"
+ query.list().size());
Cache myCache1 = CacheManager.getInstance().getCache(
"michael.cache.ehcache.hibernate.EhBlogTopic");
System.out.println("查询到EhBlogTopic cache size:"
+ myCache1.getKeys().size());
myCache1 = CacheManager.getInstance().getCache(
"michael.cache.ehcache.hibernate.EhBlogTopic");
System.out.println("EhBlogTopic cache size:"
+ myCache1.getKeys().size() + ",详细记录如下：");
for (Object str : myCache1.getKeys()) {
System.out.println(str);
}
System.out
.println("在同一个session，再根据ID=1查询记录时不会再去查数据库,故不会打印hsql");
EhBlogTopic vo1 = (EhBlogTopic) session.get(EhBlogTopic.class,
1);
System.out.println("根据ID=1找到的记录:" + vo1);
EhBlogTopic vo2 = new EhBlogTopic();
vo2.setId(10);
vo2.setUserId("michael");
vo2.setTopic("Myblog:11");
vo2.setSite("http://sjsky.iteye.com");
session.save(vo2);
ta.commit();
System.out.println("新增加一条记录ID=10");
} catch (Exception e) {
e.printStackTrace();
ta.rollback();
}
System.out.println("session closed.");
System.out.println("====================================");
Cache myCache1 = CacheManager.getInstance().getCache(
"michael.cache.ehcache.hibernate.EhBlogTopic");
System.out.println("EhBlogTopic cache size:"
+ myCache1.getKeys().size() + ",详细记录如下：");
for (Object str : myCache1.getKeys()) {
System.out.println(str);
}
System.out.println("====================================");
System.out.println("在当前同一个sessionFactory，配置cache的bean");
System.out.println("session open ....");
try {
Session session = sessionFactory.getCurrentSession();
ta = session.beginTransaction();
System.out
.println("不管是否第一次查询ID=1的记录，如果cache中存在的，则不会再查数据库,故不打印hsql");
EhBlogTopic vo1 = (EhBlogTopic) session.get(EhBlogTopic.class,
1);
System.out.println("根据ID=1找到的记录:" + vo1);
System.out.println("查询之前session保存的数据ID=10，也不会再查数据库,故不打印hsql");
EhBlogTopic vo2 = (EhBlogTopic) session.get(EhBlogTopic.class,
10);
System.out.println("根据之前save的ID=10找到的记录:" + vo2);
ta.commit();
} catch (Exception e) {
e.printStackTrace();
ta.rollback();
}
System.out.println("session closed.");
} catch (Exception e) {
e.printStackTrace();
} finally {
if (null != sessionFactory) {
sessionFactory.close();
}
}
System.out.println("sessionFactory closed.");
}
}运行结果如下：
ehcache - hibernate Test ...
2011-12-15 13:27:15 net.sf.ehcache.hibernate.AbstractEhcacheProvider buildCache
警告: Could not find a specific ehcache configuration for cache named [michael.cache.ehcache.hibernate.EhBlogTopic]; using defaults.
2011-12-15 13:27:15 net.sf.ehcache.hibernate.AbstractEhcacheProvider buildCache
警告: Could not find a specific ehcache configuration for cache named [michael.cache.ehcache.hibernate.EhBlogTopic2]; using defaults.
2011-12-15 13:27:15 net.sf.ehcache.hibernate.AbstractEhcacheProvider buildCache
警告: Could not find a specific ehcache configuration for cache named [michael.cache.ehcache.hibernate.EhBlogTopic3]; using defaults.
buildSessionFactory===============
====================================
session open ....
同一个session(一级缓存默认的)中，没有配置cache的Bean
Hibernate: select ehuserinfo0_.ID as ID1_, ehuserinfo0_.USER_ID as USER2_1_, ehuserinfo0_.USER_NAME as USER3_1_, ehuserinfo0_.OHTER_INFO as OHTER4_1_ from MY_TB_EH_USER_INFO ehuserinfo0_
查询全部query.list().size:2
再根据ID=1查询某记录时不会再去查数据库,故不会打印hsql
根据ID=1找到的记录:michael.cache.ehcache.hibernate.EhUserInfo@63b2e6
session closed.
session open ....
第一次根据ID=1查询某记录时,会打印hsql
Hibernate: select ehuserinfo0_.ID as ID1_0_, ehuserinfo0_.USER_ID as USER2_1_0_, ehuserinfo0_.USER_NAME as USER3_1_0_, ehuserinfo0_.OHTER_INFO as OHTER4_1_0_ from MY_TB_EH_USER_INFO ehuserinfo0_ where ehuserinfo0_.ID=?
根据ID=1找到的记录:michael.cache.ehcache.hibernate.EhUserInfo@123a389
session closed.
====================================
当前同一个sessionFactory，没有配置cache的Bean,
session open ....
第一次根据ID=1查询记录时会再去查数据库,故打印hsql如下：
Hibernate: select ehuserinfo0_.ID as ID1_0_, ehuserinfo0_.USER_ID as USER2_1_0_, ehuserinfo0_.USER_NAME as USER3_1_0_, ehuserinfo0_.OHTER_INFO as OHTER4_1_0_ from MY_TB_EH_USER_INFO ehuserinfo0_ where ehuserinfo0_.ID=?
根据ID=1找到的记录:michael.cache.ehcache.hibernate.EhUserInfo@429c19
session closed.
====================================
缓存的key cacheNames length := 7
name := sampleCache2
name := michael.cache.ehcache.hibernate.EhBlogTopic2
name := org.hibernate.cache.UpdateTimestampsCache
name := sampleCache1
name := michael.cache.ehcache.hibernate.EhBlogTopic
name := org.hibernate.cache.StandardQueryCache
name := michael.cache.ehcache.hibernate.EhBlogTopic3
====================================
同一个session(一级缓存默认的)中，配置cache的Bean
session open ....
Hibernate: select ehblogtopi0_.ID as ID2_, ehblogtopi0_.USER_ID as USER2_2_, ehblogtopi0_.TOPIC as TOPIC2_, ehblogtopi0_.SITE as SITE2_ from MY_TB_EH_BLOG_TOPIC ehblogtopi0_
查询全部query.list().size:9
查询到EhBlogTopic cache size:9
EhBlogTopic cache size:9,详细记录如下：
michael.cache.ehcache.hibernate.EhBlogTopic#6
michael.cache.ehcache.hibernate.EhBlogTopic#5
michael.cache.ehcache.hibernate.EhBlogTopic#7
michael.cache.ehcache.hibernate.EhBlogTopic#8
michael.cache.ehcache.hibernate.EhBlogTopic#2
michael.cache.ehcache.hibernate.EhBlogTopic#9
michael.cache.ehcache.hibernate.EhBlogTopic#1
michael.cache.ehcache.hibernate.EhBlogTopic#4
michael.cache.ehcache.hibernate.EhBlogTopic#3
在同一个session，再根据ID=1查询记录时不会再去查数据库,故不会打印hsql
根据ID=1找到的记录:michael.cache.ehcache.hibernate.EhBlogTopic@11a0d35
Hibernate: insert into MY_TB_EH_BLOG_TOPIC (USER_ID, TOPIC, SITE, ID) values (?, ?, ?, ?)
新增加一条记录ID=10
session closed.
====================================
EhBlogTopic cache size:10,详细记录如下：
michael.cache.ehcache.hibernate.EhBlogTopic#6
michael.cache.ehcache.hibernate.EhBlogTopic#5
michael.cache.ehcache.hibernate.EhBlogTopic#7
michael.cache.ehcache.hibernate.EhBlogTopic#8
michael.cache.ehcache.hibernate.EhBlogTopic#2
michael.cache.ehcache.hibernate.EhBlogTopic#9
michael.cache.ehcache.hibernate.EhBlogTopic#10
michael.cache.ehcache.hibernate.EhBlogTopic#1
michael.cache.ehcache.hibernate.EhBlogTopic#4
michael.cache.ehcache.hibernate.EhBlogTopic#3
====================================
在当前同一个sessionFactory，配置cache的bean
session open ....
不管是否第一次查询ID=1的记录，如果cache中存在的，则不会再查数据库,故不打印hsql
根据ID=1找到的记录:michael.cache.ehcache.hibernate.EhBlogTopic@1321f5
查询之前session保存的数据ID=10，也不会再查数据库,故不打印hsql
根据之前save的ID=10找到的记录:michael.cache.ehcache.hibernate.EhBlogTopic@1a6518
session closed.
sessionFactory closed.
2011-12-15 13:27:15 net.sf.ehcache.hibernate.AbstractEhcacheProvider buildCache
警告: Could not find a specific ehcache configuration for cache named [michael.cache.ehcache.hibernate.EhBlogTopic]; using defaults.
2011-12-15 13:27:15 net.sf.ehcache.hibernate.AbstractEhcacheProvider buildCache
警告: Could not find a specific ehcache configuration for cache named [michael.cache.ehcache.hibernate.EhBlogTopic2]; using defaults.
2011-12-15 13:27:15 net.sf.ehcache.hibernate.AbstractEhcacheProvider buildCache
警告: Could not find a specific ehcache configuration for cache named [michael.cache.ehcache.hibernate.EhBlogTopic3]; using defaults.
buildSessionFactory===============
====================================
session open ....
同一个session(一级缓存默认的)中，没有配置cache的Bean
Hibernate: select ehuserinfo0_.ID as ID1_, ehuserinfo0_.USER_ID as USER2_1_, ehuserinfo0_.USER_NAME as USER3_1_, ehuserinfo0_.OHTER_INFO as OHTER4_1_ from MY_TB_EH_USER_INFO ehuserinfo0_
查询全部query.list().size:2
再根据ID=1查询某记录时不会再去查数据库,故不会打印hsql
根据ID=1找到的记录:michael.cache.ehcache.hibernate.EhUserInfo@63b2e6
session closed.
session open ....
第一次根据ID=1查询某记录时,会打印hsql
Hibernate: select ehuserinfo0_.ID as ID1_0_, ehuserinfo0_.USER_ID as USER2_1_0_, ehuserinfo0_.USER_NAME as USER3_1_0_, ehuserinfo0_.OHTER_INFO as OHTER4_1_0_ from MY_TB_EH_USER_INFO ehuserinfo0_ where ehuserinfo0_.ID=?
根据ID=1找到的记录:michael.cache.ehcache.hibernate.EhUserInfo@123a389
session closed.
====================================
当前同一个sessionFactory，没有配置cache的Bean,
session open ....
第一次根据ID=1查询记录时会再去查数据库,故打印hsql如下：
Hibernate: select ehuserinfo0_.ID as ID1_0_, ehuserinfo0_.USER_ID as USER2_1_0_, ehuserinfo0_.USER_NAME as USER3_1_0_, ehuserinfo0_.OHTER_INFO as OHTER4_1_0_ from MY_TB_EH_USER_INFO ehuserinfo0_ where ehuserinfo0_.ID=?
根据ID=1找到的记录:michael.cache.ehcache.hibernate.EhUserInfo@429c19
session closed.
====================================
缓存的key cacheNames length := 7
name := sampleCache2
name := michael.cache.ehcache.hibernate.EhBlogTopic2
name := org.hibernate.cache.UpdateTimestampsCache
name := sampleCache1
name := michael.cache.ehcache.hibernate.EhBlogTopic
name := org.hibernate.cache.StandardQueryCache
name := michael.cache.ehcache.hibernate.EhBlogTopic3
====================================
同一个session(一级缓存默认的)中，配置cache的Bean
session open ....
Hibernate: select ehblogtopi0_.ID as ID2_, ehblogtopi0_.USER_ID as USER2_2_, ehblogtopi0_.TOPIC as TOPIC2_, ehblogtopi0_.SITE as SITE2_ from MY_TB_EH_BLOG_TOPIC ehblogtopi0_
查询全部query.list().size:9
查询到EhBlogTopic cache size:9
EhBlogTopic cache size:9,详细记录如下：
michael.cache.ehcache.hibernate.EhBlogTopic#6
michael.cache.ehcache.hibernate.EhBlogTopic#5
michael.cache.ehcache.hibernate.EhBlogTopic#7
michael.cache.ehcache.hibernate.EhBlogTopic#8
michael.cache.ehcache.hibernate.EhBlogTopic#2
michael.cache.ehcache.hibernate.EhBlogTopic#9
michael.cache.ehcache.hibernate.EhBlogTopic#1
michael.cache.ehcache.hibernate.EhBlogTopic#4
michael.cache.ehcache.hibernate.EhBlogTopic#3
在同一个session，再根据ID=1查询记录时不会再去查数据库,故不会打印hsql
根据ID=1找到的记录:michael.cache.ehcache.hibernate.EhBlogTopic@11a0d35
Hibernate: insert into MY_TB_EH_BLOG_TOPIC (USER_ID, TOPIC, SITE, ID) values (?, ?, ?, ?)
新增加一条记录ID=10
session closed.
====================================
EhBlogTopic cache size:10,详细记录如下：
michael.cache.ehcache.hibernate.EhBlogTopic#6
michael.cache.ehcache.hibernate.EhBlogTopic#5
michael.cache.ehcache.hibernate.EhBlogTopic#7
michael.cache.ehcache.hibernate.EhBlogTopic#8
michael.cache.ehcache.hibernate.EhBlogTopic#2
michael.cache.ehcache.hibernate.EhBlogTopic#9
michael.cache.ehcache.hibernate.EhBlogTopic#10
michael.cache.ehcache.hibernate.EhBlogTopic#1
michael.cache.ehcache.hibernate.EhBlogTopic#4
michael.cache.ehcache.hibernate.EhBlogTopic#3
====================================
在当前同一个sessionFactory，配置cache的bean
session open ....
不管是否第一次查询ID=1的记录，如果cache中存在的，则不会再查数据库,故不打印hsql
根据ID=1找到的记录:michael.cache.ehcache.hibernate.EhBlogTopic@1321f5
查询之前session保存的数据ID=10，也不会再查数据库,故不打印hsql
根据之前save的ID=10找到的记录:michael.cache.ehcache.hibernate.EhBlogTopic@1a6518
session closed.
sessionFactory closed.
我们从上面的详细运行日志中就可以看出cache的效果。
本文连接：http://sjsky.iteye.com/blog/1312132
转载请注明来自：Michael's blog @ http://sjsky.iteye.com
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