Mysql 在Hibernate 5中未使用hbm2ddl.auto=update创建表

数据库表不是由

hibernate cfg.xml

中的

update

设置自动创建的，具有以下组合：

Java8+Tomcat8+MySQL+Hibernate5

Java版本：

java version "1.8.0_45"
Java(TM) SE Runtime Environment (build 1.8.0_45-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.45-b02, mixed mode)

MySQL版本：

mysql  Ver 14.14 Distrib 5.6.16, for osx10.7 (x86_64) using  EditLine wrapper

Tomcat版本：

apache-tomcat-8.0.22

pom.xml代码段：

<dependency>
  <groupId>org.eclipse.persistence</groupId>
  <artifactId>javax.persistence</artifactId>
  <version>2.1.0</version>
</dependency>
<dependency>
  <groupId>javax.transaction</groupId>
  <artifactId>jta</artifactId>
  <version>1.1</version>
</dependency>
<dependency>
  <groupId>org.hibernate.javax.persistence</groupId>
  <artifactId>hibernate-jpa-2.1-api</artifactId>
  <version>1.0.0.Final</version>
</dependency>
<dependency>
  <groupId>org.hibernate</groupId>
  <artifactId>hibernate-core</artifactId>
  <version>5.0.3.Final</version>
</dependency>
<dependency>
  <groupId>org.hibernate</groupId>
  <artifactId>hibernate-entitymanager</artifactId>
  <version>5.0.3.Final</version>
</dependency>
<dependency>
  <groupId>org.hibernate</groupId>
  <artifactId>hibernate-c3p0</artifactId>
  <version>5.0.3.Final</version>
</dependency>

休眠

SessionFactory

初始化：

String resource = "hibernate.cfg.xml";
Configuration configuration = new Configuration();
configuration.configure(resource);
ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder().applySettings(configuration.getProperties()).build();
SessionFactory sessionFactoryCore = configuration.buildSessionFactory(serviceRegistry);

hibernate.cfg.xml：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC 
        "-//Hibernate/Hibernate Configuration DTD 3.0//EN" 
        "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"> 
<hibernate-configuration>
  <session-factory>
    <property name="dialect">org.hibernate.dialect.MySQLDialect</property>
    <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
    <property name="connection.url">jdbc:mysql://localhost:3306/test</property>
    <property name="connection.username">mysqluser</property>
    <property name="connection.password">******</property>
    <property name="hbm2ddl.auto">update</property>
    <property name="hibernate.max_fetch_depth">3</property>
    <mapping class="com.test.entity.Event" />
  </session-factory>
</hibernate-configuration>

org.hibernate.dialogue.mysqldialogue
com.mysql.jdbc.Driver
jdbc：mysql://localhost:3306/test
mysqluser
******
更新
3.

然而该表是通过以下组合创建到MySQL数据库中的：

Java8+Tomcat8+MySQL+Hibernate4

除了在pom.xml中，我使用的都是hibernate 4而不是5：

<dependency>
  <groupId>org.eclipse.persistence</groupId>
  <artifactId>javax.persistence</artifactId>
  <version>2.1.0</version>
</dependency>
<dependency>
  <groupId>javax.transaction</groupId>
  <artifactId>jta</artifactId>
  <version>1.1</version>
</dependency>
<dependency>
  <groupId>org.hibernate.javax.persistence</groupId>
  <artifactId>hibernate-jpa-2.1-api</artifactId>
  <version>1.0.0.Final</version>
</dependency>
<dependency>
  <groupId>org.hibernate</groupId>
  <artifactId>hibernate-core</artifactId>
  <version>4.3.11.Final</version>
</dependency>
<dependency>
  <groupId>org.hibernate</groupId>
  <artifactId>hibernate-entitymanager</artifactId>
  <version>4.3.11.Final</version>
</dependency>
<dependency>
  <groupId>org.hibernate</groupId>
  <artifactId>hibernate-c3p0</artifactId>
  <version>4.3.11.Final</version>
</dependency>

org.eclipse.persistence
javax.persistence
2.1.0
javax.transaction
jta
1.1
org.hibernate.javax.persistence
hibernate-jpa-2.1-api
1.0.0.1决赛
org.hibernate
冬眠核心
4.3.11.4最终版本
org.hibernate
休眠实体管理器
4.3.11.4最终版本
org.hibernate
hibernate-c3p0
4.3.11.4最终版本

---

Hibernate 5缺少什么？

正确的属性名称是：

Hibernate.hbm2ddl.auto

---

文档：

在SessionFactoryInitialization中尝试类似的操作：

StandardServiceRegistry standardRegistry = new StandardServiceRegistryBuilder().configure(configFile).build();       
Metadata metadata =new MetadataSources(standardRegistry).getMetadataBuilder().build();  
sessionFactory = metadata.getSessionFactoryBuilder().build();
return sessionFactory;

---

升级到Hibernate 5.x后，我们遇到了类似的问题，通过将方言更改为org.Hibernate.dialent.mysql5dialent，在Hibernate配置文件中添加

创建

。

Hibernate.hbm2ddl.auto和

hbm2ddl.auto

都不会触发表的创建冬眠5。正如我所提到的，Hibernate 4仍然在工作。一些解释将极大地提高答案的质量，并帮助将来可能遇到类似问题的其他用户。请花一些时间阅读帮助页面

StandardServiceRegistry standardRegistry = new StandardServiceRegistryBuilder().configure(configFile).build();       
Metadata metadata =new MetadataSources(standardRegistry).getMetadataBuilder().build();  
sessionFactory = metadata.getSessionFactoryBuilder().build();
return sessionFactory;