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&serverTimezone=UTC&verifyServerCertifate=false&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
Hibernate: 十一月 01, 2018 11:54:51 上午 org.hibernate.resource.transaction.backend.jdbc.internal.DdlTransactionIsolatorNonJtaImpl getIsolatedConnection
?
INFO: HHH10001501: Connection obtained from JdbcConnectionAccess [org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator$ConnectionProviderJdbcConnectionAccess@6df20ade] for (non-JTA) DDL execution was not in auto-commit mode; the Connection ‘local transaction‘ will be committed and the Connection will be set into auto-commit mode.
drop table if exists EVENTS
?
十一月 01, 2018 11:54:51 上午 org.hibernate.resource.transaction.backend.jdbc.internal.DdlTransactionIsolatorNonJtaImpl getIsolatedConnection
INFO: HHH10001501: Connection obtained from JdbcConnectionAccess [org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator$ConnectionProviderJdbcConnectionAccess@cda4919] for (non-JTA) DDL execution was not in auto-commit mode; the Connection ‘local transaction‘ will be committed and the Connection will be set into auto-commit mode.
Hibernate:
create table EVENTS (
EVENTS_ID bigint not null,
EVENT_DATE datetime(6),
title varchar(255),
primary key (EVENTS_ID)
?) engine=InnoDB
十一月 01, 2018 11:54:52 上午 org.hibernate.tool.schema.internal.SchemaCreatorImpl applyImportSources
INFO: HHH000476: Executing import script ‘org.hibernate.tool.schema.internal.exec.ScriptSourceInputNonExistentImpl@344b8190‘
Hibernate:
select
max(EVENTS_ID)
from
EVENTS
Hibernate: ? insert ? into EVENTS ?(EVENT_DATE, title, EVENTS_ID) ? values ?(?, ?, ?)Hibernate: ? insert ? into EVENTS ?(EVENT_DATE, title, EVENTS_ID) ? values ?(?, ?, ?)十一月 01, 2018 11:54:52 上午 org.hibernate.hql.internal.QueryTranslatorFactoryInitiator initiateServiceINFO: HHH000397: Using ASTQueryTranslatorFactoryHibernate: ? select event0_.EVENTS_ID as EVENTS_I1_0_, event0_.EVENT_DATE as EVENT_DA2_0_, event0_.title as title3_0_ ? from EVENTS event0_?十一月 01, 2018 11:54:52 上午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl stop
Hibernate 5 入门指南-基于类注解
原文地址：https://www.cnblogs.com/htsg/p/9888578.html