Hibernate逍遥游记-第2章-使用hibernate.properties

  1 package mypack;
  2 
  3 import org.hibernate.*;
  4 import org.hibernate.cfg.Configuration;
  5 import java.util.*;
  6 
  7 public class BusinessService{
  8   public static SessionFactory sessionFactory;
  9   
 10   /** 初始化Hibernate，创建SessionFactory实例 */
 11   static{
 12     try{
 13       // 根据默认位置的Hibernate配置文件的配置信息，创建一个Configuration实例
 14       Configuration config = new Configuration();
 15       //加载Monkey类的对象-关系映射文件
 16       config.addClass(Monkey.class);
 17       // 创建SessionFactory实例 
 18       sessionFactory = config.buildSessionFactory();
 19       SessionFactory sessionFactory2 = config.buildSessionFactory();
 20       System.out.println("---------->"+(sessionFactory2==sessionFactory));
 21       
 22     }catch(RuntimeException e){e.printStackTrace();throw e;}
 23   }
 24   
 25   /** 查询所有的Monkey对象，然后打印Monkey对象信息 */
 26   public void findAllMonkeys(){
 27     Session session = sessionFactory.openSession(); //创建一个会话
 28     Transaction tx = null;
 29     try {
 30       tx = session.beginTransaction(); //开始一个事务
 31       Query query=session.createQuery("from Monkey as m order by m.name asc");
 32       List monkeys=query.list();
 33       for (Iterator it = monkeys.iterator(); it.hasNext();) {
 34         Monkey monkey=(Monkey) it.next();
 35         System.out.println("ID="+monkey.getId()
 36          +",姓名="+monkey.getName()
 37          +",年龄="+monkey.getAge()
 38          +",性别="+(monkey.getGender()==‘M‘?"公猴":"母猴"));
 39       }
 40 
 41       tx.commit(); //提交事务
 42 
 43     }catch (RuntimeException e) {
 44       if (tx != null) {
 45          tx.rollback();
 46       }
 47       throw e;
 48     } finally {
 49        session.close();
 50     }
 51   }
 52 
 53   /** 持久化一个Monkey对象 */
 54   public void saveMonkey(Monkey monkey){
 55     Session session = sessionFactory.openSession();
 56     Transaction tx = null;
 57     try {
 58       tx = session.beginTransaction();
 59       session.save(monkey);
 60       tx.commit();
 61 
 62     }catch (RuntimeException e) {
 63       if (tx != null) {
 64         tx.rollback();
 65       }
 66       throw e;
 67     } finally {
 68       session.close();
 69     }
 70   }
 71 
 72   /** 按照OID加载一个Monkey对象，然后修改它的属性 */
 73   public void loadAndUpdateMonkey(Long monkey_id,int age){
 74     Session session = sessionFactory.openSession();
 75     Transaction tx = null;
 76     try {
 77       tx = session.beginTransaction();
 78 
 79       Monkey m=(Monkey)session.get(Monkey.class,monkey_id);
 80       m.setAge(age);
 81       tx.commit();
 82 
 83     }catch (RuntimeException e) {
 84       if (tx != null) {
 85         tx.rollback();
 86       }
 87       throw e;
 88     } finally {
 89       session.close();
 90     }
 91   }
 92 
 93   /**删除Monkey对象 */
 94   public void deleteMonkey(Monkey monkey){
 95     Session session = sessionFactory.openSession();
 96     Transaction tx = null;
 97     try {
 98       tx = session.beginTransaction();
 99       session.delete(monkey);
100       tx.commit();
101 
102     }catch (RuntimeException e) {
103       if (tx != null) {
104         tx.rollback();
105       }
106       throw e;
107     } finally {
108       session.close();
109     }
110   }
111   
112   public void test(){
113     Monkey monkey=new Monkey();
114     monkey.setName("智多星");
115     monkey.setAge(1);
116     monkey.setGender(‘M‘);
117   
118     saveMonkey(monkey);
119 
120     findAllMonkeys();
121     loadAndUpdateMonkey(monkey.getId(),2);
122     findAllMonkeys();
123     deleteMonkey(monkey);
124     findAllMonkeys();
125   }
126 
127   public static void main(String args[]){
128     new BusinessService().test();
129     sessionFactory.close();
130   }
131 }

 1 <?xml version="1.0"?>
 2 <!DOCTYPE hibernate-mapping PUBLIC
 3         "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
 4         "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
 5 
 6 <hibernate-mapping>
 7   <class name="mypack.Monkey" table="MONKEYS">
 8      
 9   
10     <id name="id" column="ID" type="long">
11       <generator class="increment"/>
12     </id>
13     <property name="name"  column="NAME"  type="string" not-null="true" />  
14     <property name="age"     column="AGE"     type="int" /> 
15     <property name="gender"  column="GENDER"       type="character"/>  
16   </class>
17 
18 </hibernate-mapping>

1 hibernate.dialect=org.hibernate.dialect.MySQLDialect
2 hibernate.connection.driver_class=com.mysql.jdbc.Driver
3 hibernate.connection.url=jdbc:mysql://localhost:3306/SAMPLEDB?useUnicode=true&characterEncoding=GBK
4 hibernate.connection.username=root
5 hibernate.connection.password=1234
6 hibernate.show_sql=true