关于Hibernate一点体会

最近开始狂看Hibernate，发觉很有看头，要彻底了解其运作还是需要一定时日。
记录最简单的操作吧
数据库
CREATE TABLE manager (
    id integer primary key DEFAULT nextval('serial'::text) NOT NULL,
    name character varying(20) NOT NULL,
    "password" character varying(20)
);
map文件
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
    "-//Hibernate/Hibernate Mapping DTD 2.0//EN"
    "http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd" >
   
<hibernate-mapping>
    <class name="Manager" table="manager">

        <id name="id" type="java.lang.Integer" column="id">
            <generator class="sequence">
                <param name="sequence">manager_id_serial</param>
            </generator>
        </id>

        <property
            name="name"
            type="java.lang.String"
            column="name"           
            length="20"
        >
            <meta attribute="scope-get">private</meta>
            <meta attribute="scope-set">private</meta>
            <meta attribute="beans-property-type">constrained</meta>
        </property>
        <property
            name="password"
            type="java.lang.String"
            column="password"
            length="20"
        />
    </class>
</hibernate-mapping>

插入数据

import net.sf.hibernate.*;
import net.sf.hibernate.cfg.*;

public class InsertData {

    public static void main(String[] args) {  
        try {
            SessionFactory sf =
                new Configuration().configure().buildSessionFactory();
            Session session = sf.openSession();
            Transaction tx = session.beginTransaction();

            for (int i = 1; i < 10; i++) {
                Manager m = new Manager();
                m.setName("Name" + i);
                m.setPassword("Password");
                session.save(m);
            }

            tx.commit();
            session.close();

        } catch (HibernateException e) {
            e.printStackTrace();
        }
    }
}


更新数据
public class UpdateData {
 /*
 delete data  
 */
    public static void main(String[] args) { 
   try {
            SessionFactory sf =
                new Configuration().configure().buildSessionFactory();
            Session session = sf.openSession();
            Transaction tx = session.beginTransaction();
   //String m = "Name0";
   Manager m1 = new Manager();
   m1.setId(1);
   m1.setName("lanhuizi");
   m1.setPassword("Nothing");
   session.update(m1);

            tx.commit();
            session.close();

        } catch (HibernateException e) {
            System.out.println("error");
        }

    }
 
}

删除数据
public class DeleteData {
 /*
 delete data  
 */
    public static void main(String[] args) { 
   try {
            SessionFactory sf =
                new Configuration().configure().buildSessionFactory();
            Session session = sf.openSession();
            Transaction tx = session.beginTransaction();
   //String m = "Name0";
   Manager m1 = new Manager();
   m1.setId(1);
   session.delete(m1);

            tx.commit();
            session.close();

        } catch (HibernateException e) {
            e.printStackTrace();
        }

    }
 
}

以上只是简单的操作，应该有更好的实现方法，批量删除，批量更新尤其是这样。
路漫漫啊

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