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

@Entitypublic 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 {@Testpublic 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();}}