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 }