在這裡下載hibernate3

1.       jar包匯入

            hibernate3.jar核心包

            required/*.jar

       hibernate-jpa-2.0-api-1.0.1.Final.jar用於jpa註解開發，web開發

              c3p0+ mysql驅動

              log4j-1.2.16.jar

              slf4j-log4j12-1.7.2.jar 整合log4j

       二級快取

              ehcache-1.5.0.jar

              commons-logging.jar

              backport-util-concurrent.jar

2.       在src下 建立hibernate.cfg.xml與log4j.properties

              hibernate.cfg.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
    "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
    "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
    <session-factory>
        <!-- hibernate.connection.driver_class : 連線資料庫的驅動  -->
        <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
        
        <!-- hibernate.connection.username : 連線資料庫的使用者名稱 -->
        <property name="hibernate.connection.username">root</property>

        <!-- hibernate.connection.password : 連線資料庫的密碼 -->
        <property name="hibernate.connection.password">root</property>

        <!-- hibernate.connection.url : 連線資料庫的地址,路徑 -->
        <property name="hibernate.connection.url">jdbc:mysql://localhost:3306/hibernate3?characterEncoding=utf-8</property>

        <!-- show_sql: 操作資料庫時,會 向控制檯列印sql語句 -->
        <property name="show_sql">true</property>

        <!-- format_sql: 列印sql語句前,會將sql語句先格式化  -->
        <property name="format_sql">true</property>

        <!-- hbm2ddl.auto: 生成表結構的策略配置
             update(最常用的取值): 如果當前資料庫中不存在表結構,那麼自動建立表結構. 
                   	 如果存在表結構,並且表結構與實體一致,那麼不做修改
                                                      如果存在表結構,並且表結構與實體不一致,那麼會修改表結構.會保留原有列.
             create(很少):無論是否存在表結構.每次啟動Hibernate都會重新建立表結構.(資料會丟失)
             create-drop(極少): 無論是否存在表結構.每次啟動Hibernate都會重新建立表結構.每次Hibernate執行結束時,刪除表結構.
             validate(很少):不會自動建立表結構.也不會自動維護表結構.Hibernate只校驗表結構. 如果表結構不一致將會丟擲異常.
          -->
        <property name="hbm2ddl.auto">update</property>

        <!-- 資料庫方言配置    org.hibernate.dialect.MySQLDialect (選擇最短的)  -->
        <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>

        <!-- hibernate.connection.autocommit: 事務自動提交  -->
        <property name="hibernate.connection.autocommit">true</property>

        <!-- 將Session與執行緒繫結=> 只有配置了該配置,才能使用getCurrentSession -->
        <property name="hibernate.current_session_context_class">thread</property>

        <!-- 引入ORM 對映檔案 填寫src之後的路徑      -->
        <mapping resource="pojo/Customer.hbm.xml"/>
    </session-factory>
</hibernate-configuration>
 

### direct log messages to stdout ###
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n

### direct messages to file mylog.log ###
#log4j.appender.file=org.apache.log4j.FileAppender
#log4j.appender.file.File=c\:\\mylog.log
#log4j.appender.file.layout=org.apache.log4j.PatternLayout
#log4j.appender.file.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n

### set log levels - for more verbose logging change 'info' to 'debug' ###

log4j.rootLogger=info, stdout
 

3.       在建立pojo類和對映檔案

Customer.java

package pojo;

import java.io.Serializable;

public class Customer implements Serializable{
	private static final long serialVersionUID = 1L;
	private int id;
	private String name;
	private int age;
	private String city;
	
	public int getId() {
		return id;
	}
	public void setId(int id) {
		this.id = id;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public int getAge() {
		return age;
	}
	public void setAge(int age) {
		this.age = age;
	}
	public String getCity() {
		return city;
	}
	public void setCity(String city) {
		this.city = city;
	}
	@Override
	public String toString() {
		return "Customer [id=" + id + ", name=" + name + ", age=" + age + ", city=" + city + "]";
	}	
}

<?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">
<!-- 完成實體類 和 資料表 對映 -->
<hibernate-mapping>
	<!-- 1、類與表的對映 -->
	<class name="pojo.Customer" table="customer" catalog="hibernate3">
		<!-- 2、類中屬性 與 表中 資料列 對映 -->
		<id name="id" column="id" type="int">
			<!-- 主鍵策略 identity 主鍵自增長 -->
			<generator class="identity"></generator>
		</id>
		<!-- 普通屬性 -->
		<property name="name" column="name" type="java.lang.String"></property> <!-- java型別 -->
		<property name="age" column="age" type="int"></property>
		<property name="city">
			<column name="city" sql-type="varchar(20)"></column> <!-- SQL型別 -->
		</property>
	</class>
</hibernate-mapping>

package dao;

import java.util.List;

import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import org.junit.Test;

import pojo.Customer;

public class HibernateTest {
	@Test
	public void testAdd(){
		Configuration configuration =new Configuration().configure();
		SessionFactory sessionFactory=configuration.buildSessionFactory();
		Session session=sessionFactory.openSession();
		
		Transaction transaction=session.beginTransaction();
		Customer customer=new Customer();
		customer.setName("王五");
		customer.setAge(22);
		customer.setCity("廣州");
		session.save(customer);
		transaction.commit();
		
		session.close();
		sessionFactory.close();
	}
	
	
	@Test
	public void testFindAll(){
		Configuration configuration=new Configuration().configure();
		SessionFactory sessionFactory=configuration.buildSessionFactory();
		Session session=sessionFactory.getCurrentSession();
		
		Transaction transaction=session.beginTransaction();
		String hql="from Customer";
		Query query=session.createQuery(hql);
		List<Customer> customers=query.list();
		System.out.println(customers);		
		transaction.commit();
		
//		session.close();
//		sessionFactory.close();
	}
}