Hibernate4.x之入门篇

 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         <!-- 配置连接数据库的基本信息 -->
 8         <property name="connection.username">scott</property>
 9         <property name="connection.password">tiger</property>
10         <property name="connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
11         <property name="connection.url">jdbc:oracle:thin:@localhost:1521:orcl</property>
12     
13         <!-- 配置hibernate基本信息 -->
14         <!-- hibernate所使用的数据库方言 -->
15         <property name="dialect">org.hibernate.dialect.Oracle10gDialect</property>
16         
17         <!-- 执行操作时是否在控制台打印sql -->
18         <property name="show_sql">true</property>
19         
20         <!-- 是否对SQL进行格式化 -->        
21         <property name="format_sql">true</property>
22         
23         <!-- 指定自动生成数据表的策略 -->
24         <property name="hbm2ddl.auto">update</property>
25         
26         <!-- 指定关联的.hbm.xml 文件 -->
27         <mapping resource="com/yl/hibernate/helloworld/News.hbm.xml"/>
28 
29     </session-factory>
30 </hibernate-configuration>

 1 package com.yl.hibernate.helloworld;
 2 
 3 import java.sql.Date;
 4 
 5 public class News {
 6     
 7     private Integer id;
 8     private String title;
 9     private String author;
10     
11     private Date newsdate;
12 
13     public Integer getId() {
14         return id;
15     }
16 
17     public void setId(Integer id) {
18         this.id = id;
19     }
20 
21     public String getTitle() {
22         return title;
23     }
24 
25     public void setTitle(String title) {
26         this.title = title;
27     }
28 
29     public String getAuthor() {
30         return author;
31     }
32 
33     public void setAuthor(String author) {
34         this.author = author;
35     }
36 
37     public Date getNewsdate() {
38         return newsdate;
39     }
40 
41     public void setNewsdate(Date newsdate) {
42         this.newsdate = newsdate;
43     }
44 
45     public News(){}
46     
47     public News(String title, String author, Date newsdate) {
48         super();
49         this.title = title;
50         this.author = author;
51         this.newsdate = newsdate;
52     }
53 
54     @Override
55     public String toString() {
56         return "News [id=" + id + ", title=" + title + ", author=" + author
57                 + ", date=" + newsdate + "]";
58     }
59     
60     
61     
62 }

 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 2014-11-19 21:19:05 by Hibernate Tools 3.4.0.CR1 -->
 5 <hibernate-mapping>
 6     <class name="com.yl.hibernate.helloworld.News" table="NEWS">
 7         
 8         <id name="id" type="java.lang.Integer">
 9             <column name="ID" />
10             <!-- 指定主键的生成方式，native：使用数据库本地方式 -->
11             <generator class="native" />
12         </id>
13         <property name="title" type="java.lang.String">
14             <column name="TITLE" />
15         </property>
16         <property name="author" type="java.lang.String">
17             <column name="AUTHOR" />
18         </property>
19         <property name="newsdate" type="java.sql.Date">
20             <column name="NEWSDATE" />
21         </property>
22     </class>
23 </hibernate-mapping>

 1 package com.yl.hibernate.helloworld;
 2 
 3 import java.sql.Date;
 4 
 5 import org.hibernate.Session;
 6 import org.hibernate.SessionFactory;
 7 import org.hibernate.Transaction;
 8 import org.hibernate.cfg.Configuration;
 9 import org.hibernate.service.ServiceRegistry;
10 import org.hibernate.service.ServiceRegistryBuilder;
11 import org.junit.Test;
12 
13 public class HibernateTest {
14 
15     @Test
16     public void test() {
17         //1.创建一个SessionFactory对象
18         SessionFactory sessionFactory = null;
19         
20         //1.1 创建Configuration对象，对应hibernate的基本配置信息和对象关联映射信息
21         Configuration configuration = new Configuration().configure();
22         //4.0之前的创建方式
23         //sessionFactory = configuration.buildSessionFactory();
24         
25         //1.2  创建一个ServiceRegistry 对象：hibernate4.x新添加的对象。hibernate的任何配置和服务器都需要在该对象中注册后才能有效
26         ServiceRegistry serviceRegistry = 
27                 new ServiceRegistryBuilder().applySettings(configuration.getProperties())
28                                             .buildServiceRegistry();
29         
30         //1.3 创建SessionFactory对象
31         sessionFactory = configuration.buildSessionFactory(serviceRegistry);
32         
33         //2.创建一个Session对象
34         Session session = sessionFactory.openSession();
35         //3.开启事务
36         Transaction transaction = session.beginTransaction();
37         //4.执行保存操作
38         News news = new News("Java", "yulei", new Date(new java.util.Date().getTime()));
39         session.save(news);
40         
41         /*News news2 = (News) session.get(News.class, 2);
42         System.out.println(news2);*/
43         //5.提交事务
44         transaction.commit();
45         //6.关闭Session
46         session.close();
47         //7.关闭SessionFactory 对象
48         sessionFactory.close();
49         
50     }
51 
52 }

 1 //1.1 创建Configuration对象，对应hibernate的基本配置信息和对象关联映射信息
 2 Configuration configuration = new Configuration().configure();
 3 
 4 //1.2 创建一个ServiceRegistry 对象：hibernate4.x新添加的对象。hibernate的任何配置和服务器都需要在该对象中注册后才能有效
 5 ServiceRegistry serviceRegistry = 
 6 new ServiceRegistryBuilder().applySettings(configuration.getProperties())
 7 .buildServiceRegistry();
 8 
 9 //1.3 创建SessionFactory对象
10 sessionFactory = configuration.buildSessionFactory(serviceRegistry);