今天学习了下hibernate，写了个小的手工程序，总结下，
首先创建数据库表：
复制代码 代码如下:
create table increment_testr(id bigint not null, name char(10), primary key(id));
eclipse下，新建工程。
新建数据库表的映射，这里使用手工方式完成：
IncrementTester.java
public class IncrementTester { private Long id; private String name; public IncrementTester(){} public IncrementTester(String name){ this.name = name; } public Long getId(){ return this.id; } private void setId(Long id){ this.id = id; } public String getName(){ return this.name; } public void setName(String name){ this.name = name; } }
对应编写映射xml文件
IncrementTester.hbm.xml
PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
private
实现具体功能的类BussinessService
import java.lang.reflect.*; import org.hibernate.*; import org.hibernate.cfg.*; import java.io.*; import java.sql.*; import java.util.*; public class BussinessService { public static SessionFactory sessionFactory; static{ try{ Configuration config = new Configuration().configure(); sessionFactory = config.buildSessionFactory(); }catch(Exception e){ e.printStackTrace(); } } public void findAllObjects(String className){ Session session = sessionFactory.openSession(); Transaction tx = null; try{ tx = session.beginTransaction(); List objects = session.createQuery("from "+className).list(); for(Iterator it = objects.iterator();it.hasNext();){ Long id = new Long(0); IncrementTester xx = (IncrementTester)it.next(); id=xx.getId(); System.out.println("ID of "+className+":"+id+" name: "+xx.getName()); } tx.commit(); }catch(Exception e){ e.printStackTrace(); }finally{ session.close(); } } public void saveObject(Object object){ Session session = sessionFactory.openSession(); Transaction tx = null; try{ tx = session.beginTransaction(); session.save(object); tx.commit(); }catch(Exception e){ e.printStackTrace(); if(tx != null){ tx.rollback(); } }finally{ session.close(); } } public void deleteAllObject(String className){ Session session = sessionFactory.openSession(); Transaction tx = null; try{ tx = session.beginTransaction(); Query query=session.createQuery("delete from "+className); query.executeUpdate(); tx.commit(); }catch(Exception e){ e.printStackTrace(); if(tx!=null){ tx.rollback(); } }finally{ session.close(); } } }
实现主函数：
public class test { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub String; BussinessService aa = new BussinessService(); aa.deleteAllObject(name); Object o1 = null; try { o1 = Class.forName(name).newInstance(); ((IncrementTester)o1).setName("caijie"); aa.saveObject(o1); o1 = Class.forName(name).newInstance(); ((IncrementTester)o1).setName("gufeng"); aa.saveObject(o1); } catch (Exception e) { e.printStackTrace(); } aa.findAllObjects(name); } }
hibernate配置文件：hibernate.cfg.xml
PUBLIC "-//Hibernate/Hibernate Configuration DTD//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
org.hibernate.dialect.MySQLDialect
com.mysql.jdbc.Driver
jdbc:mysql://localhost:3306/test
root
root
true
增加相应的库，运行后成功得到结果：
Hibernate: delete from INCREMENT_TESTR Hibernate: select max(ID) from INCREMENT_TESTR Hibernate: insert into INCREMENT_TESTR (NAME, ID) values (?, ?) Hibernate: insert into INCREMENT_TESTR (NAME, ID) values (?, ?) Hibernate: select incrementt0_.ID as ID0_, incrementt0_.NAME as NAME0_ from INCREMENT_TESTR incrementt0_ ID of IncrementTester:1 name: caijie ID of IncrementTester:2 name: gufeng