首先创建hibernate.cfg.xml配置文件并做简单的配置

<hibernate-configuration>
    <session-factory>
        <!-- Database connection settings -->
        <property name="connection.url">jdbc:mysql://localhost:3306/databaseName?useSSL=false&amp;serverTimezone=UTC&amp;verifyServerCertifate=false&amp;allowPublicKeyRetrieval=true</property>
        <property name="connection.driver_class">com.mysql.cj.jdbc.Driver</property>
        <property name="connection.username">root</property>
        <property name="connection.password">passwd</property>
​
        <!-- SQL dialect -->
        <property name="dialect">org.hibernate.dialect.MySQL8Dialect</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">create</property>
​
        <!-- JDBC connection pool (use the built-in) -->
        <property name="connection.pool_size">1</property>
​
        <!-- Disable the second-level cache  -->
        <property name="cache.provider_class">org.hibernate.cache.internal.NoCachingRegionFactory</property>
    </session-factory>
</hibernate-configuration>

创建实体Java类

import java.util.Date;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;
​
import org.hibernate.annotations.GenericGenerator;
​
@Entity
@Table( name = "EVENTS" )
public class Event {
    private Long id;
​
    private String title;
    private Date date;
​
    public Event() {
        // this form used by Hibernate
    }
​
    public Event(String title, Date date) {
        // for application use, to create new events
        this.title = title;
        this.date = date;
    }
​
    @Id
    @GeneratedValue(generator="increment")
    @GenericGenerator(name="increment", strategy = "increment")
    @Column(name = "EVENTS_ID")
    public Long getId() {
        return id;
    }
​
    private void setId(Long id) {
        this.id = id;
    }
​
    @Temporal(TemporalType.TIMESTAMP)
    @Column(name = "EVENT_DATE")
    public Date getDate() {
        return date;
    }
​
    public void setDate(Date date) {
        this.date = date;
    }
​
    public String getTitle() {
        return title;
    }
​
    public void setTitle(String title) {
        this.title = title;
    }
}

向hibernate.cfg.xml文件中添加映射信息

<mapping class="类路径.Event"/>

JUnit测试测试程序

import java.util.Date;
import java.util.List;
​
import junit.framework.TestCase;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.boot.MetadataSources;
import org.hibernate.boot.registry.StandardServiceRegistry;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
​
public class AnnotationsIllustrationTest extends TestCase {
    private SessionFactory sessionFactory;
​
    @Override
    protected void setUp() throws Exception {
        // A SessionFactory is set up once for an application!
        final StandardServiceRegistry registry = new StandardServiceRegistryBuilder()
                .configure() // configures settings from hibernate.cfg.xml
                .build();
        try {
            sessionFactory = new MetadataSources(registry).buildMetadata().buildSessionFactory();
        } catch (Exception e) {
            // The registry would be destroyed by the SessionFactory, but we had trouble building the SessionFactory
            // so destroy it manually.
            StandardServiceRegistryBuilder.destroy(registry);
        }
    }
​
    @Override
    protected void tearDown() throws Exception {
        if (sessionFactory != null) {
            sessionFactory.close();
        }
    }
​
    @SuppressWarnings({"unchecked"})
    public void testBasicUsage() {
        // create a couple of events...
        Session session = sessionFactory.openSession();
        session.beginTransaction();
        session.save(new Event("Our very first event!", new Date()));
        session.save(new Event("A follow up event", new Date()));
        session.getTransaction().commit();
        session.close();
​
        // now lets pull events from the database and list them
        session = sessionFactory.openSession();
        session.beginTransaction();
        List result = session.createQuery("from Event").list();
        for (Event event : (List<Event>) result) {
            System.out.println("Event (" + event.getDate() + ") : " + event.getTitle());        }        session.getTransaction().commit();        session.close();    }}

运行测试