一个简单的手工hibernate程序

    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：

    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"

"">











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 name="IncrementTester";
        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"

"">









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