（1）第一个程序（使用配置文件和注解）

使用配置文件建立Hibernate程序

0. Jar包

1. 建立实体类Student 

public class Student {private int id;private String name;private int age;}

2. 建立数据库表student

id（key），name，age三列

3. 建立映射文件 student.hbm.xml, 建立实体类和表以及字段的对应关系

<?xml version="1.0"?><!DOCTYPE hibernate-mapping PUBLIC        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"        "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"><hibernate-mapping package="com.vin.hibernate.model"><class name="Student" table="student"><id name="id" column="id"></id><property name="name" column="name"></property><property name="age" column="age"></property></class></hibernate-mapping>

实体类与表的对应：<class>标签中，name=实体类名，table=表名

实体类属性与表字段的对应：<property>标签中，name=实体类属性，column=表字段。<id>是主键字段的<property>

4. 建立Hibernate配置文件hibernate.cfg.xml 

<?xml version='1.0' encoding='utf-8'?><!DOCTYPE hibernate-configuration PUBLIC        "-//Hibernate/Hibernate Configuration DTD 3.0//EN"        "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"><hibernate-configuration>    <session-factory>        <!-- Database connection settings -->        <property name="connection.driver_class">com.mysql.jdbc.Driver</property>        <property name="connection.url">jdbc:mysql://localhost:3306/hibernate</property>        <property name="connection.username">root</property>        <property name="connection.password">mobai977146</property>        <!-- JDBC connection pool (use the built-in) -->        <!-- <property name="connection.pool_size">1</property> -->        <!-- SQL dialect -->        <property name="dialect">org.hibernate.dialect.HSQLDialect</property>        <!-- Enable Hibernate's automatic session context management -->        <!-- <property name="current_session_context_class">thread</property> -->        <!-- Disable the second-level cache  -->        <property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>        <!-- Echo all executed SQL to stdout -->        <property name="show_sql">true</property>        <!-- Drop and re-create the database schema on startup -->        <!-- <property name="hbm2ddl.auto">update</property> -->        <mapping resource="com/vin/hibernate/model/Student.hbm.xml"/>        <!-- <mapping class="com.vin.hibernate.model.Teacher"/> -->    </session-factory></hibernate-configuration>

从文档copy，更改自己的jdbc配置即可。

5. 辅助类，生产sessionFactory

package com.vin.hibernate.util;import org.hibernate.SessionFactory;import org.hibernate.cfg.Configuration;public class HibernateUtil {    private static final SessionFactory sessionFactory = buildSessionFactory();    private static SessionFactory buildSessionFactory() {        try {            // Create the SessionFactory from hibernate.cfg.xml            return new Configuration().configure().buildSessionFactory();        }        catch (Throwable ex) {            // Make sure you log the exception, as it might be swallowed            System.err.println("Initial SessionFactory creation failed." + ex);            throw new ExceptionInInitializerError(ex);        }    }    public static SessionFactory getSessionFactory() {        return sessionFactory;    }}

6. 测试

public class Test {@Testpublic void save(Student s) {SessionFactory sf =  HibernateUtil.getSessionFactory();Session session = sf.openSession();session.beginTransaction();session.save(s);System.out.println(s);session.getTransaction().commit();session.close();sf.close();}}

</pre><p></p><p><span style="font-size:18px;"><span style="font-size: 14px;">7. 测试结果</span></span></p><p><pre name="code" class="java">Student [id=3, name=dominique, age=13]Hibernate: insert into student (name, age, id) values (?, ?, ?)

使用Annotation建立Hibernate程序

0. 加入annotation的jar包

1. 建立实体类Teacher

</pre><p><span style="font-size:14px"></span><pre name="code" class="java">@Entity@Table(name="teacher")public class Teacher {private int id;private String name;private String title;@Idpublic int getId() {return id;}public void setId(int id) {this.id = id;}@Column(name="name")public String getName() {return name;}public void setName(String name) {this.name = name;}@Column(name="title")public String getTitle() {return title;}public void setTitle(String title) {this.title = title;}@Overridepublic String toString() {return "Teacher [id=" + id + ", name=" + name + ", title=" + title+ "]";}}

2. 建立数据库表student

id（key），name，age三列

3. 无需建立映射文件。而在实体类Teacher上注解

@Entity表明javabean的实体，

@Table表明实体类对应DB内的表名，如果不屑@Table，则默认与实体类名相同的表名

@Column表明属性对应DB表内的字段，如果不写@Column，则默认与属性名相同的字段

主键上注解@Id

4. 建立Hibernate配置文件hibernate.cfg.xml 

<?xml version='1.0' encoding='utf-8'?><!DOCTYPE hibernate-configuration PUBLIC        "-//Hibernate/Hibernate Configuration DTD 3.0//EN"        "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"><hibernate-configuration>    <session-factory>        <!-- Database connection settings -->        <property name="connection.driver_class">com.mysql.jdbc.Driver</property>        <property name="connection.url">jdbc:mysql://localhost:3306/hibernate</property>        <property name="connection.username">root</property>        <property name="connection.password">mobai977146</property>        <!-- JDBC connection pool (use the built-in) -->        <!-- <property name="connection.pool_size">1</property> -->        <!-- SQL dialect -->        <property name="dialect">org.hibernate.dialect.HSQLDialect</property>        <!-- Enable Hibernate's automatic session context management -->        <!-- <property name="current_session_context_class">thread</property> -->        <!-- Disable the second-level cache  -->        <property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>        <!-- Echo all executed SQL to stdout -->        <property name="show_sql">true</property>        <!-- Drop and re-create the database schema on startup -->        <!-- <property name="hbm2ddl.auto">update</property> -->        <mapping class="com.vin.hibernate.model.Teacher"/>    </session-factory></hibernate-configuration>

从文档copy，更改自己的jdbc配置即可。
<mapping>中，改为class

5. 辅助类，生产sessionFactory

package com.vin.hibernate.util;import org.hibernate.SessionFactory;import org.hibernate.cfg.AnnotationConfiguration;import org.hibernate.cfg.Configuration;public class HibernateAnnotationUtil {    private static final SessionFactory sessionFactory = buildSessionFactory();    private static SessionFactory buildSessionFactory() {        try {            // Create the SessionFactory from hibernate.cfg.xml            return new AnnotationConfiguration().configure().buildSessionFactory();        }        catch (Throwable ex) {            // Make sure you log the exception, as it might be swallowed            System.err.println("Initial SessionFactory creation failed." + ex);            throw new ExceptionInInitializerError(ex);        }    }    public static SessionFactory getSessionFactory() {        return sessionFactory;    }}

使用Annotation时，不再是new Configuratino， 而是new AnnotationConfiguration。

6. 测试

public class Test {@Testpublic void save(Teacher t) {SessionFactory sf =  HibernateAnnotationUtil.getSessionFactory();Session session = sf.openSession();session.beginTransaction();session.save(t);System.out.println(t);session.getTransaction().commit();session.close();sf.close();}}