hibernate初涉

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <!DOCTYPE hibernate-configuration PUBLIC
 3             "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
 4             "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
 5 <hibernate-configuration>
 6       <session-factory>
 7             <property name="connection.username">root</property>
 8             <property name="connection.password">root</property>
 9             <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
10             <!-- 三个斜杠为简写方式 -->
11             <property name="connection.url">jdbc:mysql:///hibernate?userUnicode=true&amp;
12                         characterEncoding=UTF-8</property>
13             <property name="dialect">org.hibernate.dialect.MySQLDialect</property>
14  
15             <property name="show_sql">true</property>
16             <property name="format_sql">true</property>
17  
18             <!-- 生成表结构策略 -->
19             <!--create：表示启动的时候先drop，再create
20                   create-drop: 也表示创建，只不过再系统关闭前执行一下drop
21                   update: 这个操作启动的时候会去检查schema是否一致，如果不一致会做scheme更新
22                   validate: 启动时验证现有schema与你配置的hibernate是否一致，如果不一致就抛出异常，并不做更新
23             -->
24             <property name="hbm2ddl.auto">update</property>
25  
26             <!-- 默认的数据库 -->
27             <property name="hibernate.default_schema">hibernate</property>
28       </session-factory>
29 </hibernate-configuration>

 1 <?xml version="1.0"?>
 2 <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
 3 "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
 4 <!-- Generated 2016-11-12 23:40:02 by Hibernate Tools 3.4.0.CR1 -->
 5 <hibernate-mapping>
 6       <class name="Students" table="STUDENTS">
 7             <id name="sid" type="int">
 8                   <column name="SID" />
 9                   <generator class="assigned" />
10             </id>
11             <property name="sname" type="java.lang.String">
12                   <column name="SNAME" />
13             </property>
14             <property name="gender" type="java.lang.String">
15                   <column name="GENDER" />
16             </property>
17             <property name="birthday" type="java.util.Date">
18                   <column name="BIRTHDAY" />
19             </property>
20             <property name="address" type="java.lang.String">
21                   <column name="ADDRESS" />
22             </property>
23       </class>
24 </hibernate-mapping>

1 <session-factory>
2      ...
3      <mapping resource="Students.hbm.xml"/>
4 </session-factory>

 1 import java.util.Date;
 2 import org.hibernate.Session;
 3 import org.hibernate.SessionFactory;
 4 import org.hibernate.Transaction;
 5 import org.hibernate.cfg.Configuration;
 6 import org.hibernate.service.ServiceRegistry;
 7 import org.hibernate.service.ServiceRegistryBuilder;
 8 import org.junit.After;
 9 import org.junit.Before;
10 import org.junit.Test;
11  
12 public class StudentsTest {
13        private SessionFactory sessionFactory;
14        private Session session;
15        private Transaction transaction;
16  
17        @Before
18        public void init() {
19               //创建配置对象
20               Configuration config = new Configuration().configure();
21  
22               //创建服务注册对象
23               ServiceRegistry serviceRegistry = new ServiceRegistryBuilder().applySettings(
24                            config.getProperties()).buildServiceRegistry();
25  
26               //创建会话工厂对象
27               sessionFactory = config.buildSessionFactory(serviceRegistry);
28  
29               //回话对象
30               session = sessionFactory.openSession();
31  
32               //打开事物
33               transaction = session.beginTransaction();
34        }
35  
36        @After
37        public void destory() {
38               transaction.commit();
39               session.close();
40               sessionFactory.close();
41        }
42  
43        @Test
44        public void TestSaveStudents() {
45               Students students = new Students(3, "小白", "男", new Date(), "武当山");
46               session.save(students);
47        }
48 }