hibernate 开发步骤

一、创建hibernate配置文件

      hibernate.cfg.xml

     基本都是这样   直接复制拿去用就好了

<?xml version='1.0' encoding='utf-8'?><!DOCTYPE hibernate-configuration PUBLIC        "-//Hibernate/Hibernate Configuration DTD//EN"        "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd"><hibernate-configuration>    <session-factory>        <!--链接数据库的基本信息-->        <property name="connection.url">jdbc:mysql://localhost:3306/pipi</property>         <property name="connection.driver_class">com.mysql.jdbc.Driver</property>        <property name="connection.username">root</property>        <property name="connection.password">root</property>        <!-- 配置hibernate的基本信息 -->        <!-- 配置数据库方言dialect -->        <property name="dialect">org.hibernate.dialect.MySQL5InnoDBDialect</property>        <!-- 操作时是否在控制台打印sql语句 -->        <property name="show_sql">true</property>        <!-- 是否对sql进行格式化 -->        <property name="format_sql">true</property>        <!-- 指定自动生成数据表的策略 -->        <property name="hbm2ddl.auto">update</property>        <!-- DB schema will be updated if needed -->        <!-- <property name="hbm2ddl.auto">update</property> -->    </session-factory></hibernate-configuration>

二、创建持久化类persistent object

public class Namelist {    private String id;    private String name;    public Namelist(String id, String name) {        this.id = id;        this.name = name;    }    public String getId() {        return id;    }    public void setId(String id) {        this.id = id;    }    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    @Override    public boolean equals(Object o) {        if (this == o) return true;        if (o == null || getClass() != o.getClass()) return false;        Namelist namelist = (Namelist) o;        if (id != null ? !id.equals(namelist.id) : namelist.id != null) return false;        if (name != null ? !name.equals(namelist.name) : namelist.name != null) return false;        return true;    }    @Override    public int hashCode() {        int result = id != null ? id.hashCode() : 0;        result = 31 * result + (name != null ? name.hashCode() : 0);        return result;    }}    

三、创建对象-关系映射文件  *.hbm.xml

<?xml version='1.0' encoding='utf-8'?><!DOCTYPE hibernate-mapping PUBLIC    "-//Hibernate/Hibernate Mapping DTD 3.0//EN"    "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"><hibernate-mapping>    <class name="com.pipi.hibernateDemo.Namelist" table="namelist" schema="pipi">        <id name="id">            <column name="id" sql-type="varchar(30)" length="30"/>        </id>        <property name="name">            <column name="name" sql-type="varchar(30)" length="30" not-null="true"/>        </property>    </class></hibernate-mapping>

四、通过hibernate api编写访问数据库的代码

写一个测试类

import com.pipi.hibernateDemo.Namelist;import org.hibernate.Session;import org.hibernate.SessionFactory;import org.hibernate.Transaction;import org.hibernate.boot.registry.StandardServiceRegistry;import org.hibernate.boot.registry.StandardServiceRegistryBuilder;import org.hibernate.cfg.Configuration;import org.junit.Test;/** * Created by 1 on 2017/3/22. */public class HibernateTest {    @Test    public void test(){        //1、创建SessionFactory对象        SessionFactory sessionFactory=null;        //创建Configuration对象：对应hibernate的基本配置信息和对象映射关系        Configuration configuration = new Configuration().configure();        //创建一个ServiceRegistry对象：4.x以后新添加的对象        // hibernate的任何服务和配置都需要在该对象注册后生效        StandardServiceRegistry standardRegistry = new StandardServiceRegistryBuilder().configure().build();        // 这个已经不用了 ServiceRegistry serviceRegistry = new ServiceRegistryBuilder().applySettings(configuration.getProperties()).buildServiceRegistry();        //创建sessionFactory        sessionFactory =configuration.buildSessionFactory(standardRegistry);        //2、创建一个session对象        Session session = sessionFactory.openSession();        //3、开启事务        Transaction transaction = session.beginTransaction();        //4、执行保存操作        Namelist namelist=new Namelist("0","pipi");        session.save(namelist);        //5、提交事务        transaction.commit();        //6、关闭session        session.close();        //7、关闭SessionFactory对象        sessionFactory.close();    }}

如果是利用IntelliJ idea的话，连接数据库以后，二和三都是自动生成的，只需稍微改动即可。

本皮皮实在太懒咯就不上图了