Hibernate基础之SessionFactory

在完成下面的一些基础之后我们就开始了下面的学习。

用eclipse使用hibernate 实现用户添加https://blog.csdn.net/maryverynice_/article/details/116403475

那么就开始：

package cn.hrbust.dao;import cn.hrbust.pojo.User;
import junit.framework.TestCase;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import org.hibernate.query.Query;import java.sql.Date;
import java.util.List;public class manageUser extends TestCase {//查询用户对象public void testQuerySUser() {Configuration cfg = null;SessionFactory sf = null;Session session = null;Transaction ts = null;try {sf = HibernateUtil.getSessionFactory();//SessionFactory单态模式session = sf.getCurrentSession();//保证每个读写线程有唯一的session实例ts = session.beginTransaction();Query query = session.createQuery("from User");List<User> users = query.list();
//          for(int i=0;i<users.size();i++)
//          {//              User u =users.get(i);
//              System.out.println(u.getName()+" "+u.getAge());
//          }for (User u : users) {System.out.println(u.getName() + " " + u.getAge());}ts.commit();} catch (HibernateException e) {// TODO Auto-generated catch blocke.printStackTrace();if (ts != null) {ts.rollback();}} finally {//session.close();//sf.close();}}//保存用户对象public void testSavaUser() {Configuration cfg = null;SessionFactory sf = null;Session session = null;Transaction ts = null;User u = new User();u.setName("张三");u.setGender("女");u.setAge(21);u.setBirthday(Date.valueOf("2002-1-1"));try {sf = HibernateUtil.getSessionFactory();//SessionFactory单态模式session = sf.getCurrentSession();//保证每个读写线程有唯一的session实例ts = session.beginTransaction();/** Query query=session.createNamedQuery("from User"); List users=(List)* query.list();*/session.save(u);ts.commit();} catch (HibernateException e) {// TODO Auto-generated catch blocke.printStackTrace();if (ts != null) {ts.rollback();}} finally {//session.close();//sf.close();}}public void testSavaUser1() {Configuration cfg = null;SessionFactory sf = null;Session session = null;Transaction ts = null;User u = new User();u.setName("张三");u.setGender("女");u.setAge(21);u.setBirthday(Date.valueOf("2002-1-1"));try {sf = HibernateUtil.getSessionFactory();//SessionFactory单态模式session = sf.getCurrentSession();//保证每个读写线程有唯一的session实例ts = session.beginTransaction();/** Query query=session.createNamedQuery("from User"); List users=(List)* query.list();*/session.save(u);u.setName("赵四");ts.commit();u.setName("赵三");//在提交之后不执行，u为托管对象，有id，record，但是没有session管理，不发sql语句} catch (HibernateException e) {// TODO Auto-generated catch blocke.printStackTrace();if (ts != null) {ts.rollback();}} finally {//session.close();//sf.close();}}public void testDetachedObject(){Configuration cfg =null;SessionFactory sf=null;Session session=null;Transaction ts=null;User u=new User();u.setName("张三");u.setGender("女");u.setAge(21);u.setBirthday(Date.valueOf("2002-1-1"));try {sf=HibernateUtil.getSessionFactory();//SessionFactory单态模式session=sf.getCurrentSession();//保证每个读写线程有唯一的session实例ts=session.beginTransaction();session.save(u);ts.commit();u.setName("赵三");sf=HibernateUtil.getSessionFactory();//SessionFactory单态模式session=sf.getCurrentSession();//保证每个读写线程有唯一的session实例ts=session.beginTransaction();session.update(u);ts.commit();//在提交之后不执行，u为托管对象，有id，record，但是没有session管理，不发sql语句} catch (HibernateException e) {// TODO Auto-generated catch blocke.printStackTrace();if(ts !=null) {ts.rollback();}}finally {//session.close();//sf.close();}}public void testDetachedObject1(){Configuration cfg =null;SessionFactory sf=null;Session session=null;Transaction ts=null;User u=new User();u.setId(4);u.setName("张三");u.setGender("女");u.setAge(21);u.setBirthday(Date.valueOf("2002-1-1"));try {sf=HibernateUtil.getSessionFactory();//SessionFactory单态模式session=sf.getCurrentSession();//保证每个读写线程有唯一的session实例ts=session.beginTransaction();session.saveOrUpdate(u);ts.commit();} catch (HibernateException e) {// TODO Auto-generated catch blocke.printStackTrace();if(ts !=null) {ts.rollback();}}finally {//session.close();//sf.close();}}public void testDeletedObject(){Configuration cfg =null;SessionFactory sf=null;Session session=null;Transaction ts=null;User u=new User();u.setId(4);u.setName("张三");u.setGender("女");u.setAge(21);u.setBirthday(Date.valueOf("2002-1-1"));try {sf=HibernateUtil.getSessionFactory();//SessionFactory单态模式session=sf.getCurrentSession();//保证每个读写线程有唯一的session实例ts=session.beginTransaction();session.delete(u);//u：删除对象，有id，没有纳入session，不发sql，数据库没有纳入ts.commit();} catch (HibernateException e) {// TODO Auto-generated catch blocke.printStackTrace();if(ts !=null) {ts.rollback();}}finally {//session.close();//sf.close();}}public void testSavaUser2(){Configuration cfg =null;SessionFactory sf=null;Session session=null;Transaction ts=null;User u=new User();u.setName("张三");u.setGender("女");u.setAge(21);u.setBirthday(Date.valueOf("2002-1-1"));try {sf=HibernateUtil.getSessionFactory();//SessionFactory单态模式session=sf.getCurrentSession();//保证每个读写线程有唯一的session实例ts=session.beginTransaction();/** Query query=session.createNamedQuery("from User"); List users=(List)* query.list();*/session.save(u);u.setName("赵三");u.setName("赵四");ts.commit();} catch (HibernateException e) {// TODO Auto-generated catch blocke.printStackTrace();if(ts !=null) {ts.rollback();}}finally {//session.close();//sf.close();}}public void testGetUser2(){Configuration cfg =null;SessionFactory sf=null;Session session=null;Transaction ts=null;User u=new User();u.setName("张三");u.setGender("女");u.setAge(21);u.setBirthday(Date.valueOf("2002-1-1"));try {sf=HibernateUtil.getSessionFactory();//SessionFactory单态模式session=sf.getCurrentSession();//保证每个读写线程有唯一的session实例ts=session.beginTransaction();u=(User)session.get(User.class, 5);System.out.println(u.toString());ts.commit();} catch (HibernateException e) {// TODO Auto-generated catch blocke.printStackTrace();if(ts !=null) {ts.rollback();}}finally {//session.close();//sf.close();}}public static void main(String[] args) {Configuration cfg =null;SessionFactory sf=null;Session session=null;Transaction ts=null;User u=new User();u.setName("李四");u.setGender("男");u.setAge(21);u.setBirthday(Date.valueOf("2001-1-1"));try {sf=HibernateUtil.getSessionFactory();//SessionFactory单态模式session=sf.getCurrentSession();//保证每个读写线程有唯一的session实例ts=session.beginTransaction();session.save(u);ts.commit();} catch (HibernateException e) {// TODO Auto-generated catch blocke.printStackTrace();if(ts !=null) {ts.rollback();}}finally {//session.close();//sf.close();}}
}

package cn.hrbust.dao;import org.hibernate.HibernateException;import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
//SessionFactory单态模式
public class HibernateUtil {private static SessionFactory sf=null;private static Configuration cfg=null;//    静态代码块，在类加载的时候只能执行一次static {try {cfg = new Configuration().configure();sf = cfg.buildSessionFactory();} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();}}public static SessionFactory getSessionFactory() {return sf;}public static void closeSessionFactory(){sf.close();}
}

package cn.hrbust.dao;import org.hibernate.boot.Metadata;
import org.hibernate.boot.MetadataSources;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import org.hibernate.service.ServiceRegistry;
import org.hibernate.tool.hbm2ddl.SchemaExport;
import org.hibernate.tool.schema.TargetType;import java.util.EnumSet;public class ExportSchema {public static void main(String[] args) {// TODO Auto-generated method stub//服务注册对象ServiceRegistry sr= new StandardServiceRegistryBuilder().configure().build();Metadata metadata =new MetadataSources(sr).buildMetadata();//创建Schema，表的对象，目的是根据数据生成表SchemaExport se=new SchemaExport();se.create(EnumSet.of(TargetType.DATABASE), metadata);}}

<!--~ Hibernate, Relational Persistence for Idiomatic Java~~ License: GNU Lesser General Public License (LGPL), version 2.1 or later.~ See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.-->
<!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><property name="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</property><property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property><property name="hibernate.connection.url">jdbc:mysql://localhost:3306/hellohibernate?useSSL=false</property><property name="hibernate.connection.username">root</property><property name="hibernate.connection.password">12345</property><property name="show_sql">true</property><mapping resource="cn/hrbust/pojo/User.hbm.xml"/></session-factory>
</hibernate-configuration>

这个东西直接就导入就好了。运行就大功告成了。

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