HqlDemoApp.java
package cn.itcast.h3.query.hql; import java.io.Serializable; import org.hibernate.Query; import org.hibernate.Session; import org.hibernate.Transaction; import cn.itcast.h3.query.hql.vo.StudentModel; import cn.itcast.h3.query.hql.vo.TeacherModel; import cn.itcast.util.HibernateUtil; public class HqlDemoApp { //测试是否存在二级缓存 void testHasCache(){ Session s = HibernateUtil.getSession(); //读取数据,并且将数据加载入当前Session的一级缓存, //同时加载到当前SessionFactory的二级缓存 TeacherModel tm1 = (TeacherModel) s.get(TeacherModel.class, 3L); System.out.println(tm1); //读取的是当前Session的一级缓存数据 TeacherModel tm2 = (TeacherModel) s.get(TeacherModel.class, 3L); System.out.println(tm2); s.close(); System.out.println("-----------------------------"); Session s2 = HibernateUtil.getSession(); //读取的是二级缓存的数据 TeacherModel tm3 = (TeacherModel) s2.get(TeacherModel.class, 3L); System.out.println(tm3); TeacherModel tm5 = (TeacherModel) s2.get(TeacherModel.class, 3L); System.out.println(tm5); s2.close(); System.out.println("--------------------------"); Session s3 = HibernateUtil.getSession(); //读取的是二级缓存的数据 TeacherModel tm4 = (TeacherModel) s3.get(TeacherModel.class, 3L); System.out.println(tm4); s3.close(); } //测试SQL查询数据是否加载二级缓存 void testQueryToCache(){ Session s = HibernateUtil.getSession(); Query q = s.createQuery("from TeacherModel"); q.list(); Query q2 = s.createQuery("from TeacherModel"); q2.list(); s.close(); System.out.println("--------------------"); Session s3 = HibernateUtil.getSession(); TeacherModel tm4 = (TeacherModel) s3.get(TeacherModel.class, 3L); System.out.println(tm4); s3.close(); } //测试SQL查询是否读取二级缓存数据 void testQueryToCache2(){ Session s3 = HibernateUtil.getSession(); TeacherModel tm4 = (TeacherModel) s3.get(TeacherModel.class, 3L); System.out.println(tm4); s3.close(); System.out.println("--------------------"); Session s = HibernateUtil.getSession(); Query q = s.createQuery("from TeacherModel where uuid = :uuid"); q.setLong("uuid", 3L); TeacherModel tm = (TeacherModel) q.uniqueResult(); System.out.println(tm); s.close(); } //测试保存数据是否影响二级缓存数据 void testSaveToCache(){ //保存数据 Session s3 = HibernateUtil.getSession(); Transaction t = s3.beginTransaction(); TeacherModel tm = new TeacherModel(); tm.setTeacherName("aaa"); tm.setNick("bbb"); Serializable uuid = s3.save(tm); t.commit(); s3.close(); System.out.println("--------------------"); Session s = HibernateUtil.getSession(); TeacherModel tm4 = (TeacherModel) s.get(TeacherModel.class, uuid); System.out.println(tm4); s.close(); } //测试删除数据是否影响二级缓存数据 void testDeleteToCache(){ //保存数据 Session s3 = HibernateUtil.getSession(); Transaction t = s3.beginTransaction(); TeacherModel tm = (TeacherModel) s3.get(TeacherModel.class, 6L); s3.delete(tm); t.commit(); s3.close(); System.out.println("--------------------"); Session s = HibernateUtil.getSession(); TeacherModel tm4 = (TeacherModel) s.get(TeacherModel.class, 6L); System.out.println(tm4); s.close(); } //测试更新数据是否影响二级缓存数据 void testUpdateToCache(){ //保存数据 Session s3 = HibernateUtil.getSession(); Transaction t = s3.beginTransaction(); TeacherModel tm = (TeacherModel) s3.get(TeacherModel.class, 4L); tm.setTeacherName("hahahh"); s3.update(tm); t.commit(); s3.close(); System.out.println("--------------------"); Session s = HibernateUtil.getSession(); TeacherModel tm4 = (TeacherModel) s.get(TeacherModel.class, 4L); System.out.println(tm4); s.close(); } //测试集合操作二级缓存 void testCollectionToCache(){ Session s = HibernateUtil.getSession(); TeacherModel tm = (TeacherModel) s.get(TeacherModel.class, 1L); System.out.println(tm.getStudents()); s.close(); System.out.println("----------------"); Session s2 = HibernateUtil.getSession(); TeacherModel tm2 = (TeacherModel) s2.get(TeacherModel.class, 1L); System.out.println(tm2.getStudents()); s2.close(); } //DML影响二级缓存的操作 void testDMLToCache(){ Session s = HibernateUtil.getSession(); Transaction t = s.beginTransaction(); StudentModel tm = (StudentModel) s.get(StudentModel.class, 3L); System.out.println(tm); Query q = s.createQuery("update TeacherModel set teacherName=:teacherName where uuid = :uuid"); q.setString("teacherName", "测试更新1"); q.setLong("uuid", 4L); q.executeUpdate(); t.commit(); s.close(); Session s2 = HibernateUtil.getSession(); StudentModel tm2 = (StudentModel) s2.get(StudentModel.class, 3L); System.out.println(tm2); s2.close(); } //查询缓存 void testQueryToCache3(){ Session s2 = HibernateUtil.getSession(); Query q2 = s2.createQuery("from TeacherModel where uuid=:uuid"); //本次查询开启查询缓存 q2.setCacheable(true); System.out.println(q2.list()); s2.close(); System.out.println("-------------"); Session s = HibernateUtil.getSession(); Query q = s.createQuery("from TeacherModel where uuid = 2"); q.setCacheable(true); System.out.println(q.list()); s.close(); } public static void main(String[] args) { new HqlDemoApp().testQueryToCache3(); } }
ehcache.xml
<ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../config/ehcache.xsd"> <diskStore path="d:\cache-data"/> <cache name="c1" maxElementsInMemory="10" eternal="false" timeToIdleSeconds="120" timeToLiveSeconds="1200" overflowToDisk="true" maxElementsOnDisk="10000000" diskPersistent="false" diskExpiryThreadIntervalSeconds="120" memoryStoreEvictionPolicy="LRU" /> <defaultCache maxElementsInMemory="10" eternal="false" timeToIdleSeconds="120" timeToLiveSeconds="1200" overflowToDisk="true" maxElementsOnDisk="10000000" diskPersistent="false" diskExpiryThreadIntervalSeconds="120" memoryStoreEvictionPolicy="LRU" /> </ehcache>
hibernate.cfg.xml
<?xml version='1.0' encoding='utf-8'?> <!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd"> <hibernate-configuration> <session-factory> <!--数据库连接的配置--> <property name="connection.driver_class">com.mysql.jdbc.Driver</property> <property name="connection.url">jdbc:mysql://localhost:3306/h3</property> <property name="connection.username">root</property> <property name="connection.password">root</property> <!--方言的配置,用于区别使用何种数据库--> <property name="dialect">org.hibernate.dialect.MySQLDialect</property> <!--可选配置项中,开发过程常用设置--> <property name="show_sql">true</property> <property name="format_sql">false</property> <!-- 开启二级缓存功能 --> <property name="cache.use_second_level_cache">true</property> <!-- 设置二级缓存供应商 --> <property name="cache.provider_class">org.hibernate.cache.EhCacheProvider</property> <!-- 开启查询缓存 --> <property name="cache.use_query_cache">true</property> <!-- 开启线程绑定Session --> <property name="current_session_context_class">thread</property> <!--资源文件注册--> <mapping resource="cn/itcast/h3/query/hql/vo/StudentModel.hbm.xml"/> <mapping resource="cn/itcast/h3/query/hql/vo/TeacherModel.hbm.xml"/> <!-- 二级缓存的配置(使用) --> <!-- 类级缓存的配置 --> <class-cache region="c1" usage="read-write" class="cn.itcast.h3.query.hql.vo.TeacherModel" /> <class-cache region="c1" usage="read-write" class="cn.itcast.h3.query.hql.vo.StudentModel" /> <!-- 集合缓存的配置 --> <collection-cache region="c1" usage="read-write" collection="cn.itcast.h3.query.hql.vo.TeacherModel.students" /> </session-factory> </hibernate-configuration>
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作者:架构师小跟班
开发者导航: http://www.codernav.com
本文版权归作者和博客园共有,欢迎转载,但未经作者同意必须保留此段声明,且在文章页面明显位置给出原文连接,否则保留追究法律责任的权利。
如果文中有什么错误,欢迎指出,以免更多的人被误导。
作者:架构师小跟班
开发者导航: http://www.codernav.com
本文版权归作者和博客园共有,欢迎转载,但未经作者同意必须保留此段声明,且在文章页面明显位置给出原文连接,否则保留追究法律责任的权利。
如果文中有什么错误,欢迎指出,以免更多的人被误导。