Hibernate教程01——建立一个hibernate程序

Hibernate教程01——建立一个hibernate程序

一、使用pom引入hibernate的依赖库

<properties>

<junit.version>4.12</junit.version>

<hibernate.version>4.3.9.Final</hibernate.version>

</properties>

<dependencies>

<dependency>

<groupId>junit</groupId>

<artifactId>junit</artifactId>

<version>${junit.version}</version>

<scope>test</scope>

</dependency>

<dependency>

<groupId>org.hibernate</groupId>

<artifactId>hibernate-core</artifactId>

<version>${hibernate.version}</version>

</dependency>

 

<!-- Because this is a web app, we also have a dependency on the servlet 

api. -->

<dependency>

<groupId>javax.servlet</groupId>

<artifactId>javax.servlet-api</artifactId>

<version>3.1.0</version>

</dependency>

 

<!-- Hibernate uses slf4j for logging, for our purposes here use the simple 

backend -->

<dependency>

<groupId>org.slf4j</groupId>

<artifactId>slf4j-simple</artifactId>

<version>1.7.9</version>

</dependency>

<dependency>

<groupId>org.slf4j</groupId>

<artifactId>slf4j-simple</artifactId>

<version>1.7.9</version>

<classifier>sources</classifier>

</dependency>

 

<dependency>

<groupId>org.javassist</groupId>

<artifactId>javassist</artifactId>

<version>3.20.0-GA</version>

</dependency>

<dependency>

<groupId>mysql</groupId>

<artifactId>mysql-connector-java</artifactId>

<version>5.1.37</version>

</dependency>

二、创建hibernate.cfg.xml文件，放置在类路径下

<?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>

 

        <!-- Database connection settings -->

        <property name="connection.driver_class">com.mysql.jdbc.Driver</property>

        <property name="connection.url">jdbc:mysql://localhost:3306/test</property>

        <property name="connection.username">root</property>

        <property name="connection.password"></property>

        <property name="connection.characterEncoding">utf8</property>

        

 

        <!-- JDBC connection pool (use the built-in) -->

        <property name="connection.pool_size">1</property>

 

        <!-- SQL dialect -->

        <property name="dialect">org.hibernate.dialect.MySQLDialect</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.internal.NoCacheProvider</property>

 

        <!-- Echo all executed SQL to stdout -->

        <property name="show_sql">true</property>

        <property name="format_sql">true</property>

 

        <!-- Drop and re-create the database schema on startup -->

        <property name="hbm2ddl.auto">update</property>

 

<mapping class="liuht.hibernate.learn01.entity.Event" />

<mapping class="liuht.hibernate.learn01.entity.Tree" />

<mapping class="liuht.hibernate.learn01.entity.Department" />

<mapping class="liuht.hibernate.learn01.entity.Menu" />    

        <!-- <mapping resource="org/hibernate/tutorial/domain/Event.hbm.xml"/>  -->

 

    </session-factory>

 

</hibernate-configuration>

三、创建实体类

@Entity

public class Event {

@Id

@GeneratedValue

@Column(name = "id")

private Long id;

 

    private String title;

    

    private Date date;

 

public Long getId() {

return id;

}

 

public void setId(Long id) {

this.id = id;

}

 

public String getTitle() {

return title;

}

 

public void setTitle(String title) {

this.title = title;

}

 

public Date getDate() {

return date;

}

 

public void setDate(Date date) {

this.date = date;

}

四、创建hibernate工具类

public class HibernateUtil {

private static final SessionFactory sessionFactory = buildSessionFactory();

private static SessionFactory buildSessionFactory() {

 try {

 Configuration cfg = new Configuration().configure();

 StandardServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder()

                     .applySettings(cfg.getProperties()).build();

            return cfg.buildSessionFactory(serviceRegistry);

        }

        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;

} 

}

五、建立测试程序

public class TestLearn01 {

@Test

public void test01(){

 

 Session session = HibernateUtil.getSessionfactory().getCurrentSession();

     session.beginTransaction();

 

     Event theEvent = new Event();

     theEvent.setTitle("test");

     theEvent.setDate(new Date());

     session.save(theEvent);

     session.getTransaction().commit();

     HibernateUtil.getSessionfactory().close();

}

}