hibernate自动建表

hibernate配置文件hibernate.cfg.xml

[java] view plain copy

1. <!--  
2.   ~ Hibernate, Relational Persistence for Idiomatic Java  
3.   ~  
4.   ~ License: GNU Lesser General Public License (LGPL), version 2.1 or later.  
5.   ~ See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.  
6.   -->  
7. <!DOCTYPE hibernate-configuration PUBLIC  
8.     "-//Hibernate/Hibernate Configuration DTD 3.0//EN"  
9.     "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">  
10.   
11. <hibernate-configuration>  
12.     <session-factory>  
13.         <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>  
14.         <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>  
15.         <property name="hibernate.connection.url">jdbc:mysql://localhost:3306/student</property>  
16.         <property name="hibernate.connection.username">root</property>  
17.         <property name="hibernate.connection.password"></property>  
18.         <property name="hbm2ddl.auto">update</property>  
19.                 <property name="myeclipse.connection.profile">com.mysql.jdbc.Driver</property>  
20.         <property name="show_sql">true</property>  
21.         <mapping resource="com/student/Item.hbm.xml"/>  
22.     </session-factory>  
23. </hibernate-configuration>  

然后我们试着插如一条数据

[java] view plain copy

1. package com.student;  
2.   
3. import org.hibernate.HibernateException;  
4. import org.hibernate.Session;  
5. import org.hibernate.SessionFactory;  
6. import org.hibernate.Transaction;  
7. import org.hibernate.cfg.Configuration;  
8.   
9. public class TestDemo {  
10.         public static void main(String[] args){  
11.               
12.             Configuration cfg = ;  
13.             SessionFactory sf  = ;  
14.             Session s = ;  
15.             Transaction ts= ;  
16.               
17.             Student student = new Student();  
18.             student.setUsername("zhangmo");  
19.             student.setPassword("123456789");  
20.             student.setAge(20);  
21.               
22.             try {  
23.                 cfg = new Configuration().configure();  
24.                 sf = cfg.buildSessionFactory();  
25.                 s = sf.openSession();  
26.                 ts = s.beginTransaction();  
27.                   
28.                 s.save(student);  
29.                 ts.commit();  
30.             } catch (HibernateException e) {  
31.                 // TODO Auto-generated catch block  
32.                 if(ts != )  
33.                 {  
34.                     ts.rollback();  
35.                 }  
36.                 e.printStackTrace();  
37.             } finally{  
38.                 if(s != ){  
39.                     s.close();  
40.                 }  
41.             }  
42.               
43.         }  
44. }  

运行结果：