Hibernate总结(九)--hibernate连接Oracle数据

本文内容来自尚硅谷

1创建一个连接oracle数据库的hibernate项目

1.1目录结构

1.2hibernate.cfg.xml文件内容

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
		"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
		"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
    <session-factory>
    
    	<!-- Hibernate 连接数据库的基本信息 -->
    	<property name="connection.username">scott</property>
    	<property name="connection.password">java</property>
    	<property name="connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
    	<property name="connection.url">jdbc:oracle:thin:@localhost:1521:orcl</property>

		<!-- Hibernate 的基本配置 -->
		<!-- Hibernate 使用的数据库方言 -->
		<property name="dialect">org.hibernate.dialect.Oracle10gDialect</property>
	
		<!-- 运行时是否打印 SQL -->
    	<property name="show_sql">true</property>
    
    	<!-- 运行时是否格式化 SQL -->
    	<property name="format_sql">true</property>
    
    	<!-- 生成数据表的策略 -->
    	<property name="hbm2ddl.auto">update</property>
    	
    	<!-- 设置 Hibernate 的事务隔离级别 -->
    	<property name="connection.isolation">2</property>
    	
    	<!-- 删除对象后, 使其 OID 置为 null -->
    	<property name="use_identifier_rollback">true</property>
    	

    	<!-- 设定 JDBC 的 Statement 读取数据的时候每次从数据库中取出的记录条数 -->
    	<property name="hibernate.jdbc.fetch_size">100</property>
    	
    	<!-- 设定对数据库进行批量删除，批量更新和批量插入的时候的批次大小 -->
    	<property name="jdbc.batch_size">30</property>
    	<!-- 需要关联的 hibernate 映射文件 .hbm.xml -->
		<mapping resource="com/atguigu/hibernate/entities/Department.hbm.xml"/>
    </session-factory>
</hibernate-configuration>

1.3hibernatetest文件内容

package com.atguigu.hibernate.test;

import java.sql.Connection;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Iterator;
import java.util.LinkedHashSet;
import java.util.List;

import org.hibernate.Criteria;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import org.hibernate.criterion.Conjunction;
import org.hibernate.criterion.Disjunction;
import org.hibernate.criterion.MatchMode;
import org.hibernate.criterion.Order;
import org.hibernate.criterion.Projections;
import org.hibernate.criterion.Restrictions;
import org.hibernate.jdbc.Work;
import org.hibernate.service.ServiceRegistry;
import org.hibernate.service.ServiceRegistryBuilder;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

import com.atguigu.hibernate.dao.DepartmentDao;
import com.atguigu.hibernate.entities.Department;
import com.atguigu.hibernate.entities.Employee;
import com.atguigu.hibernate.hibernate.HibernateUtils;

public class HibernateTest {

	private SessionFactory sessionFactory;
	private Session session;
	private Transaction transaction;
	
	@Before
	public void init(){
		Configuration configuration = new Configuration().configure();
		ServiceRegistry serviceRegistry = 
				new ServiceRegistryBuilder().applySettings(configuration.getProperties())
				                            .buildServiceRegistry();
		sessionFactory = configuration.buildSessionFactory(serviceRegistry);
		
		session = sessionFactory.openSession();
		transaction = session.beginTransaction();
	}
	
	@After
	public void destroy(){
		transaction.commit();
		session.close();
		sessionFactory.close();
	}

	
	@Test
	public void testHQL(){

	}
	
}

这样一个基本的配置就建好了

1.4来自：