hibernate初入门2--Annotation

 1 package com.hibernate.Exp150704;
 2 
 3 import javax.persistence.Entity;
 4 import javax.persistence.Id;
 5 
 6 @Entity//Annotation的特别之处，由于注明此类为实体类
 7 public class Teacher {
 8     //@Id 此处亦可放置注释，用于指代主键，但如果get方法为非标准方式定义的，如通过getSid()获取Id 则可能出现问题！！
 9     private int id;
10     private String name;
11     private String title;
12     
13     @Id//表示此为获得实体类所对应的数据库的主键   

14     public int getId() {
15         return id;
16     }
17     public void setId(int id) {
18         this.id = id;
19     }
20     public String getName() {
21         return name;
22     }
23     public void setName(String name) {
24         this.name = name;
25     }
26     public String getTitle() {
27         return title;
28     }
29     public void setTitle(String title) {
30         this.title = title;
31     }
32     
33 
34 }

 1 <?xml version=‘1.0‘ encoding=‘utf-8‘?> 
 2 <!DOCTYPE hibernate-configuration PUBLIC 
 3         "-//Hibernate/Hibernate Configuration DTD 3.0//EN" 
 4         "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd"> 
 5 <hibernate-configuration>
 6   <session-factory>
 7     <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
 8     <property name="connection.url">jdbc:mysql://localhost:3306/hibernate</property>
 9     <property name="connection.username">root</property>
10     <property name="connection.password">TAN19911104</property>
11 
12     <property name="dialect">org.hibernate.dialect.MySQLDialect</property>
13 
14     <property name="cache.provider_class">org.hibernate.cache.internal.NoCacheProvider</property>
15 
16     <property name="show_sql">true</property>
17     
18     <mapping resource="com/hibernate/Exp150702/Student.hbm.xml"/>
19     <mapping class="com.hibernate.Exp150704.Teacher"/>  /*此处为使用Annotation时，配置文件对映射的定义形式  为class = "实体类" */
20   </session-factory>
21 </hibernate-configuration>

 1 package com.hibernate.Exp150704;
 2 
 3 import org.hibernate.Session;
 4 import org.hibernate.SessionFactory;
 5 import org.hibernate.cfg.AnnotationConfiguration;
 6 import org.hibernate.cfg.Configuration;
 7 import org.junit.Test;
 8 
 9 
10 public class TestDemo {
11 
12     @Test    
13     @SuppressWarnings("deprecation")
14     public void test(){
15         
16         Teacher t = new Teacher();
17         t.setId(1);
18         t.setName("小元");
19         t.setTitle("proffessional");
20         //只有AnnotationConfiguration能够获取实体类中使用的Annotation映射
21         Configuration cfg = new AnnotationConfiguration();
22         SessionFactory sf = cfg.configure().buildSessionFactory();
23         Session session = sf.openSession();
24         session.beginTransaction();
25         session.save(t);
26         session.getTransaction().commit();
27         session.close();
28     }
29 }