Hibernate的Session中一级缓存-白红宇

Hibernate的Session中一级缓存

阅读量：4677 次

发布时间：2019-06-09

本文共 23049 字，大约阅读时间需要 76 分钟。

package easyStart.Run;import org.hibernate.Session;import org.hibernate.SessionFactory;import org.hibernate.boot.MetadataSources;import org.hibernate.boot.registry.StandardServiceRegistry;import org.hibernate.boot.registry.StandardServiceRegistryBuilder;import easyStart.Entity.User;public class QuickStart {    public static void main(String[] args) {        final StandardServiceRegistry registry = new StandardServiceRegistryBuilder().configure().build();        SessionFactory sessionFactory = null;        try {            sessionFactory = new MetadataSources(registry).buildMetadata().buildSessionFactory();        } catch (Exception e) {            StandardServiceRegistryBuilder.destroy(registry);        }        Session session = sessionFactory.openSession();        session.beginTransaction();        // 处理事务 Begin                User user1 = session.get(User.class, 1);        User user2 = session.get(User.class, 1);        System.out.println(user1==user2);                // 处理事务 End        session.getTransaction().commit();        session.close();        sessionFactory.close();    }}

问题：控制台输出结果是TRUE 还是 FALSE？

1 六月 11, 2018 4:59:57 下午 org.hibernate.Version logVersion 2 INFO: HHH000412: Hibernate Core {5.0.1.Final} 3 六月 11, 2018 4:59:57 下午 org.hibernate.cfg.Environment 
      
        4 INFO: HHH000206: hibernate.properties not found 5 六月 11, 2018 4:59:57 下午 org.hibernate.cfg.Environment buildBytecodeProvider 6 INFO: HHH000021: Bytecode provider name : javassist 7 六月 11, 2018 4:59:57 下午 org.hibernate.annotations.common.reflection.java.JavaReflectionManager 
       
         8 INFO: HCANN000001: Hibernate Commons Annotations {5.0.0.Final} 9 六月 11, 2018 4:59:57 下午 org.hibernate.boot.jaxb.internal.stax.LocalXmlResourceResolver resolveEntity10 WARN: HHH90000012: Recognized obsolete hibernate namespace http://hibernate.sourceforge.net/hibernate-mapping. Use namespace http://www.hibernate.org/dtd/hibernate-mapping instead.  Support for obsolete DTD/XSD namespaces may be removed at any time.11 六月 11, 2018 4:59:58 下午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure12 WARN: HHH000402: Using Hibernate built-in connection pool (not for production use!)13 六月 11, 2018 4:59:58 下午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator14 INFO: HHH000401: using driver [com.mysql.cj.jdbc.Driver] at URL [jdbc:mysql://localhost:3306/ssh?serverTimezone=GMT&useSSL=false]15 六月 11, 2018 4:59:58 下午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator16 INFO: HHH000046: Connection properties: {user=root, password=****}17 六月 11, 2018 4:59:58 下午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator18 INFO: HHH000006: Autocommit mode: false19 六月 11, 2018 4:59:58 下午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure20 INFO: HHH000115: Hibernate connection pool size: 20 (min=1)21 六月 11, 2018 4:59:58 下午 org.hibernate.dialect.Dialect 
        
         22 INFO: HHH000400: Using dialect: org.hibernate.dialect.MySQLInnoDBDialect23 六月 11, 2018 4:59:58 下午 org.hibernate.boot.model.source.internal.hbm.ModelBinder bindProperty24 WARN: HHH90000003: Use of DOM4J entity-mode is considered deprecated25 六月 11, 2018 4:59:58 下午 org.hibernate.boot.model.source.internal.hbm.ModelBinder bindProperty26 WARN: HHH90000003: Use of DOM4J entity-mode is considered deprecated27 六月 11, 2018 4:59:58 下午 org.hibernate.boot.model.source.internal.hbm.ModelBinder bindProperty28 WARN: HHH90000003: Use of DOM4J entity-mode is considered deprecated29 六月 11, 2018 4:59:59 下午 org.hibernate.tool.hbm2ddl.SchemaUpdate execute30 INFO: HHH000228: Running hbm2ddl schema update31 Hibernate: 32     select33         user0_.ID as ID1_0_0_,34         user0_.NAME as NAME2_0_0_,35         user0_.ADDRESS as ADDRESS3_0_0_ 36     from37         USER user0_ 38     where39         user0_.ID=?40 true41 六月 11, 2018 4:59:59 下午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl stop42 INFO: HHH000030: Cleaning up connection pool [jdbc:mysql://localhost:3306/ssh?serverTimezone=GMT&useSSL=false]

日志输出

由运行后日志输出可以看出，查询语句仅仅执行了1条！也就是说session的get方法第一次执行了SQL查询，第二次是取得第一次查询的缓存！

而且结果输出TRUE，user1==user2！

session.get方法进行查询，如果查询不到结果返回NULL；

session.load方法进行查询，如果查询不到结果抛出异常；

session.flush();会发起一条update语句；当事务提交的时候，强制使得数据库中的数据和缓存中的数据一致！

1 package easyStart.Run; 2  3 import org.hibernate.Session; 4 import org.hibernate.SessionFactory; 5 import org.hibernate.boot.MetadataSources; 6 import org.hibernate.boot.registry.StandardServiceRegistry; 7 import org.hibernate.boot.registry.StandardServiceRegistryBuilder; 8  9 import easyStart.Entity.User;10 11 public class QuickStart {12 13     public static void main(String[] args) {14 15         final StandardServiceRegistry registry = new StandardServiceRegistryBuilder().configure().build();16         SessionFactory sessionFactory = null;17         try {18             sessionFactory = new MetadataSources(registry).buildMetadata().buildSessionFactory();19         } catch (Exception e) {20             StandardServiceRegistryBuilder.destroy(registry);21         }22 23         Session session = sessionFactory.openSession();24         session.beginTransaction();25         // 处理事务 Begin26         User user = session.load(User.class, 2);27         user.setAddress("JangSu-ChangZhou");28         session.flush();29         // 处理事务 End30         session.getTransaction().commit();31         session.close();32         sessionFactory.close();33     }34 35 }

Java代码

执行后，结果：

1 六月 11, 2018 5:16:50 下午 org.hibernate.Version logVersion 2 INFO: HHH000412: Hibernate Core {5.0.1.Final} 3 六月 11, 2018 5:16:50 下午 org.hibernate.cfg.Environment 
      
        4 INFO: HHH000206: hibernate.properties not found 5 六月 11, 2018 5:16:50 下午 org.hibernate.cfg.Environment buildBytecodeProvider 6 INFO: HHH000021: Bytecode provider name : javassist 7 六月 11, 2018 5:16:51 下午 org.hibernate.annotations.common.reflection.java.JavaReflectionManager 
       
         8 INFO: HCANN000001: Hibernate Commons Annotations {5.0.0.Final} 9 六月 11, 2018 5:16:51 下午 org.hibernate.boot.jaxb.internal.stax.LocalXmlResourceResolver resolveEntity10 WARN: HHH90000012: Recognized obsolete hibernate namespace http://hibernate.sourceforge.net/hibernate-mapping. Use namespace http://www.hibernate.org/dtd/hibernate-mapping instead.  Support for obsolete DTD/XSD namespaces may be removed at any time.11 六月 11, 2018 5:16:52 下午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure12 WARN: HHH000402: Using Hibernate built-in connection pool (not for production use!)13 六月 11, 2018 5:16:52 下午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator14 INFO: HHH000401: using driver [com.mysql.cj.jdbc.Driver] at URL [jdbc:mysql://localhost:3306/ssh?serverTimezone=GMT&useSSL=false]15 六月 11, 2018 5:16:52 下午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator16 INFO: HHH000046: Connection properties: {user=root, password=****}17 六月 11, 2018 5:16:52 下午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator18 INFO: HHH000006: Autocommit mode: false19 六月 11, 2018 5:16:52 下午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure20 INFO: HHH000115: Hibernate connection pool size: 20 (min=1)21 六月 11, 2018 5:16:52 下午 org.hibernate.dialect.Dialect 
        
         22 INFO: HHH000400: Using dialect: org.hibernate.dialect.MySQLInnoDBDialect23 六月 11, 2018 5:16:52 下午 org.hibernate.boot.model.source.internal.hbm.ModelBinder bindProperty24 WARN: HHH90000003: Use of DOM4J entity-mode is considered deprecated25 六月 11, 2018 5:16:52 下午 org.hibernate.boot.model.source.internal.hbm.ModelBinder bindProperty26 WARN: HHH90000003: Use of DOM4J entity-mode is considered deprecated27 六月 11, 2018 5:16:52 下午 org.hibernate.boot.model.source.internal.hbm.ModelBinder bindProperty28 WARN: HHH90000003: Use of DOM4J entity-mode is considered deprecated29 六月 11, 2018 5:16:52 下午 org.hibernate.tool.hbm2ddl.SchemaUpdate execute30 INFO: HHH000228: Running hbm2ddl schema update31 Hibernate: 32     select33         user0_.ID as ID1_0_0_,34         user0_.NAME as NAME2_0_0_,35         user0_.ADDRESS as ADDRESS3_0_0_ 36     from37         USER user0_ 38     where39         user0_.ID=?40 Hibernate: 41     update42         USER 43     set44         NAME=?,45         ADDRESS=? 46     where47         ID=?48 六月 11, 2018 5:16:53 下午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl stop49 INFO: HHH000030: Cleaning up connection pool [jdbc:mysql://localhost:3306/ssh?serverTimezone=GMT&useSSL=false]

日志信息

可以看出当user.setAddress("JangSu-ChangZhou");执行了过后，影响了缓存中的内容，然后session.flush();函数强制更新了数据库，导致了数据库中的数据发生了变化！

注意了：session.flush();会发起一条update语句；但是还不会提交事务，只有事务被提交了，才会改变数据库的语句；

refresh()方法：他会强制发出一条SELECT语句，与缓存数据比较，如有不同，强制更新缓存使其与数据库一致！

1 package easyStart.Run; 2  3 import org.hibernate.Session; 4 import org.hibernate.SessionFactory; 5 import org.hibernate.boot.MetadataSources; 6 import org.hibernate.boot.registry.StandardServiceRegistry; 7 import org.hibernate.boot.registry.StandardServiceRegistryBuilder; 8  9 import easyStart.Entity.User;10 11 public class QuickStart {12 13     public static void main(String[] args) {14 15         final StandardServiceRegistry registry = new StandardServiceRegistryBuilder().configure().build();16         SessionFactory sessionFactory = null;17         try {18             sessionFactory = new MetadataSources(registry).buildMetadata().buildSessionFactory();19         } catch (Exception e) {20             StandardServiceRegistryBuilder.destroy(registry);21         }22 23         Session session = sessionFactory.openSession();24         session.beginTransaction();25         // 处理事务 Begin26         User user = session.load(User.class, 2);27         user.setAddress("JangSu-NanJing");28         System.out.println(user);29         session.refresh(user);30         System.out.println(user);31         // 处理事务 End32         session.getTransaction().commit();33         session.close();34         sessionFactory.close();35     }36 37 }

java源码

1 六月 11, 2018 5:36:37 下午 org.hibernate.Version logVersion 2 INFO: HHH000412: Hibernate Core {5.0.1.Final} 3 六月 11, 2018 5:36:37 下午 org.hibernate.cfg.Environment 
      
        4 INFO: HHH000206: hibernate.properties not found 5 六月 11, 2018 5:36:37 下午 org.hibernate.cfg.Environment buildBytecodeProvider 6 INFO: HHH000021: Bytecode provider name : javassist 7 六月 11, 2018 5:36:37 下午 org.hibernate.annotations.common.reflection.java.JavaReflectionManager 
       
         8 INFO: HCANN000001: Hibernate Commons Annotations {5.0.0.Final} 9 六月 11, 2018 5:36:37 下午 org.hibernate.boot.jaxb.internal.stax.LocalXmlResourceResolver resolveEntity10 WARN: HHH90000012: Recognized obsolete hibernate namespace http://hibernate.sourceforge.net/hibernate-mapping. Use namespace http://www.hibernate.org/dtd/hibernate-mapping instead.  Support for obsolete DTD/XSD namespaces may be removed at any time.11 六月 11, 2018 5:36:38 下午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure12 WARN: HHH000402: Using Hibernate built-in connection pool (not for production use!)13 六月 11, 2018 5:36:38 下午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator14 INFO: HHH000401: using driver [com.mysql.cj.jdbc.Driver] at URL [jdbc:mysql://localhost:3306/ssh?serverTimezone=GMT&useSSL=false]15 六月 11, 2018 5:36:38 下午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator16 INFO: HHH000046: Connection properties: {user=root, password=****}17 六月 11, 2018 5:36:38 下午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator18 INFO: HHH000006: Autocommit mode: false19 六月 11, 2018 5:36:38 下午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure20 INFO: HHH000115: Hibernate connection pool size: 20 (min=1)21 六月 11, 2018 5:36:39 下午 org.hibernate.dialect.Dialect 
        
         22 INFO: HHH000400: Using dialect: org.hibernate.dialect.MySQLInnoDBDialect23 六月 11, 2018 5:36:39 下午 org.hibernate.boot.model.source.internal.hbm.ModelBinder bindProperty24 WARN: HHH90000003: Use of DOM4J entity-mode is considered deprecated25 六月 11, 2018 5:36:39 下午 org.hibernate.boot.model.source.internal.hbm.ModelBinder bindProperty26 WARN: HHH90000003: Use of DOM4J entity-mode is considered deprecated27 六月 11, 2018 5:36:39 下午 org.hibernate.boot.model.source.internal.hbm.ModelBinder bindProperty28 WARN: HHH90000003: Use of DOM4J entity-mode is considered deprecated29 六月 11, 2018 5:36:39 下午 org.hibernate.tool.hbm2ddl.SchemaUpdate execute30 INFO: HHH000228: Running hbm2ddl schema update31 Hibernate: 32     select33         user0_.ID as ID1_0_0_,34         user0_.NAME as NAME2_0_0_,35         user0_.ADDRESS as ADDRESS3_0_0_ 36     from37         USER user0_ 38     where39         user0_.ID=?40 User [id=2, name=YinRui, address=JangSu-NanJing]41 Hibernate: 42     select43         user0_.ID as ID1_0_0_,44         user0_.NAME as NAME2_0_0_,45         user0_.ADDRESS as ADDRESS3_0_0_ 46     from47         USER user0_ 48     where49         user0_.ID=?50 User [id=2, name=YinRui, address=JangSu-ChangZhou]51 六月 11, 2018 5:36:39 下午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl stop52 INFO: HHH000030: Cleaning up connection pool [jdbc:mysql://localhost:3306/ssh?serverTimezone=GMT&useSSL=false]

控制台日志

数据库没有改变！

1 package easyStart.Run; 2  3 import org.hibernate.Session; 4 import org.hibernate.SessionFactory; 5 import org.hibernate.boot.MetadataSources; 6 import org.hibernate.boot.registry.StandardServiceRegistry; 7 import org.hibernate.boot.registry.StandardServiceRegistryBuilder; 8  9 import easyStart.Entity.User;10 11 public class QuickStart {12 13     public static void main(String[] args) {14 15         final StandardServiceRegistry registry = new StandardServiceRegistryBuilder().configure().build();16         SessionFactory sessionFactory = null;17         try {18             sessionFactory = new MetadataSources(registry).buildMetadata().buildSessionFactory();19         } catch (Exception e) {20             StandardServiceRegistryBuilder.destroy(registry);21         }22 23         Session session = sessionFactory.openSession();24         session.beginTransaction();25         // 处理事务 Begin26         User user1 = session.get(User.class, 2);27         System.out.println(user1);28         29         User user2 = session.get(User.class, 2);30         System.out.println(user2);31         // 处理事务 End32         session.getTransaction().commit();33         session.close();34         sessionFactory.close();35     }36 37 }

Java源码[缓存未被清空]

1 六月 11, 2018 5:44:50 下午 org.hibernate.Version logVersion 2 INFO: HHH000412: Hibernate Core {5.0.1.Final} 3 六月 11, 2018 5:44:50 下午 org.hibernate.cfg.Environment 
      
        4 INFO: HHH000206: hibernate.properties not found 5 六月 11, 2018 5:44:50 下午 org.hibernate.cfg.Environment buildBytecodeProvider 6 INFO: HHH000021: Bytecode provider name : javassist 7 六月 11, 2018 5:44:50 下午 org.hibernate.annotations.common.reflection.java.JavaReflectionManager 
       
         8 INFO: HCANN000001: Hibernate Commons Annotations {5.0.0.Final} 9 六月 11, 2018 5:44:50 下午 org.hibernate.boot.jaxb.internal.stax.LocalXmlResourceResolver resolveEntity10 WARN: HHH90000012: Recognized obsolete hibernate namespace http://hibernate.sourceforge.net/hibernate-mapping. Use namespace http://www.hibernate.org/dtd/hibernate-mapping instead.  Support for obsolete DTD/XSD namespaces may be removed at any time.11 六月 11, 2018 5:44:51 下午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure12 WARN: HHH000402: Using Hibernate built-in connection pool (not for production use!)13 六月 11, 2018 5:44:51 下午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator14 INFO: HHH000401: using driver [com.mysql.cj.jdbc.Driver] at URL [jdbc:mysql://localhost:3306/ssh?serverTimezone=GMT&useSSL=false]15 六月 11, 2018 5:44:51 下午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator16 INFO: HHH000046: Connection properties: {user=root, password=****}17 六月 11, 2018 5:44:51 下午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator18 INFO: HHH000006: Autocommit mode: false19 六月 11, 2018 5:44:51 下午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure20 INFO: HHH000115: Hibernate connection pool size: 20 (min=1)21 六月 11, 2018 5:44:51 下午 org.hibernate.dialect.Dialect 
        
         22 INFO: HHH000400: Using dialect: org.hibernate.dialect.MySQLInnoDBDialect23 六月 11, 2018 5:44:51 下午 org.hibernate.boot.model.source.internal.hbm.ModelBinder bindProperty24 WARN: HHH90000003: Use of DOM4J entity-mode is considered deprecated25 六月 11, 2018 5:44:51 下午 org.hibernate.boot.model.source.internal.hbm.ModelBinder bindProperty26 WARN: HHH90000003: Use of DOM4J entity-mode is considered deprecated27 六月 11, 2018 5:44:51 下午 org.hibernate.boot.model.source.internal.hbm.ModelBinder bindProperty28 WARN: HHH90000003: Use of DOM4J entity-mode is considered deprecated29 六月 11, 2018 5:44:52 下午 org.hibernate.tool.hbm2ddl.SchemaUpdate execute30 INFO: HHH000228: Running hbm2ddl schema update31 Hibernate: 32     select33         user0_.ID as ID1_0_0_,34         user0_.NAME as NAME2_0_0_,35         user0_.ADDRESS as ADDRESS3_0_0_ 36     from37         USER user0_ 38     where39         user0_.ID=?40 User [id=2, name=YinRui, address=JangSu-ChangZhou]41 User [id=2, name=YinRui, address=JangSu-ChangZhou]42 六月 11, 2018 5:44:52 下午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl stop43 INFO: HHH000030: Cleaning up connection pool [jdbc:mysql://localhost:3306/ssh?serverTimezone=GMT&useSSL=false]

控制台日志[只有一条查询语句]

当执行clear函数后，缓存被清理了！再看结果：

1 package easyStart.Run; 2  3 import org.hibernate.Session; 4 import org.hibernate.SessionFactory; 5 import org.hibernate.boot.MetadataSources; 6 import org.hibernate.boot.registry.StandardServiceRegistry; 7 import org.hibernate.boot.registry.StandardServiceRegistryBuilder; 8  9 import easyStart.Entity.User;10 11 public class QuickStart {12 13     public static void main(String[] args) {14 15         final StandardServiceRegistry registry = new StandardServiceRegistryBuilder().configure().build();16         SessionFactory sessionFactory = null;17         try {18             sessionFactory = new MetadataSources(registry).buildMetadata().buildSessionFactory();19         } catch (Exception e) {20             StandardServiceRegistryBuilder.destroy(registry);21         }22 23         Session session = sessionFactory.openSession();24         session.beginTransaction();25         // 处理事务 Begin26         User user1 = session.get(User.class, 2);27         System.out.println(user1);28         session.clear();// 清理缓存29         User user2 = session.get(User.class, 2);30         System.out.println(user2);31         // 处理事务 End32         session.getTransaction().commit();33         session.close();34         sessionFactory.close();35     }36 37 }

Java源码[缓存被清空]

1 六月 11, 2018 5:47:09 下午 org.hibernate.Version logVersion 2 INFO: HHH000412: Hibernate Core {5.0.1.Final} 3 六月 11, 2018 5:47:09 下午 org.hibernate.cfg.Environment 
      
        4 INFO: HHH000206: hibernate.properties not found 5 六月 11, 2018 5:47:09 下午 org.hibernate.cfg.Environment buildBytecodeProvider 6 INFO: HHH000021: Bytecode provider name : javassist 7 六月 11, 2018 5:47:09 下午 org.hibernate.annotations.common.reflection.java.JavaReflectionManager 
       
         8 INFO: HCANN000001: Hibernate Commons Annotations {5.0.0.Final} 9 六月 11, 2018 5:47:09 下午 org.hibernate.boot.jaxb.internal.stax.LocalXmlResourceResolver resolveEntity10 WARN: HHH90000012: Recognized obsolete hibernate namespace http://hibernate.sourceforge.net/hibernate-mapping. Use namespace http://www.hibernate.org/dtd/hibernate-mapping instead.  Support for obsolete DTD/XSD namespaces may be removed at any time.11 六月 11, 2018 5:47:10 下午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure12 WARN: HHH000402: Using Hibernate built-in connection pool (not for production use!)13 六月 11, 2018 5:47:10 下午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator14 INFO: HHH000401: using driver [com.mysql.cj.jdbc.Driver] at URL [jdbc:mysql://localhost:3306/ssh?serverTimezone=GMT&useSSL=false]15 六月 11, 2018 5:47:10 下午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator16 INFO: HHH000046: Connection properties: {user=root, password=****}17 六月 11, 2018 5:47:10 下午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator18 INFO: HHH000006: Autocommit mode: false19 六月 11, 2018 5:47:10 下午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure20 INFO: HHH000115: Hibernate connection pool size: 20 (min=1)21 六月 11, 2018 5:47:10 下午 org.hibernate.dialect.Dialect 
        
         22 INFO: HHH000400: Using dialect: org.hibernate.dialect.MySQLInnoDBDialect23 六月 11, 2018 5:47:10 下午 org.hibernate.boot.model.source.internal.hbm.ModelBinder bindProperty24 WARN: HHH90000003: Use of DOM4J entity-mode is considered deprecated25 六月 11, 2018 5:47:10 下午 org.hibernate.boot.model.source.internal.hbm.ModelBinder bindProperty26 WARN: HHH90000003: Use of DOM4J entity-mode is considered deprecated27 六月 11, 2018 5:47:10 下午 org.hibernate.boot.model.source.internal.hbm.ModelBinder bindProperty28 WARN: HHH90000003: Use of DOM4J entity-mode is considered deprecated29 六月 11, 2018 5:47:11 下午 org.hibernate.tool.hbm2ddl.SchemaUpdate execute30 INFO: HHH000228: Running hbm2ddl schema update31 Hibernate: 32     select33         user0_.ID as ID1_0_0_,34         user0_.NAME as NAME2_0_0_,35         user0_.ADDRESS as ADDRESS3_0_0_ 36     from37         USER user0_ 38     where39         user0_.ID=?40 User [id=2, name=YinRui, address=JangSu-ChangZhou]41 Hibernate: 42     select43         user0_.ID as ID1_0_0_,44         user0_.NAME as NAME2_0_0_,45         user0_.ADDRESS as ADDRESS3_0_0_ 46     from47         USER user0_ 48     where49         user0_.ID=?50 User [id=2, name=YinRui, address=JangSu-ChangZhou]51 六月 11, 2018 5:47:11 下午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl stop52 INFO: HHH000030: Cleaning up connection pool [jdbc:mysql://localhost:3306/ssh?serverTimezone=GMT&useSSL=false]

控制台日志[多了一条查询语句]

证实了一点：session.clear();// 清理缓存可以清空缓存内容！

转载于:https://www.cnblogs.com/batj/p/9167626.html

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