Java 使用JPA2和Hibernate自动创建表

我无法在数据库中自动创建表

我的渐变依赖性：

compile group: 'org.hibernate.javax.persistence', name: 'hibernate-jpa-2.1-api', version: '1.0.0.Final'
compile group: 'org.hibernate', name: 'hibernate-entitymanager', version: '4.3.6.Final'
compile group: 'org.postgresql', name: 'postgresql', version: '42.0.0'

My实体类（另外两个类看起来类似）：

要在数据库中获取表，我应该更改什么

[编辑]

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仅在“新鲜”数据库上创建表，即在部署之前创建表。我可以插入一些数据（如下所示）。但在下一个工件部署之后，表不会更新。我在Drop中看到相同的日志并创建操作。如果数据库不存在，则会在事件中显示相同的日志

StreetData street = new StreetData();
street.setName("A");

EntityManagerFactory entityManagerFactory = Persistence.createEntityManagerFactory("parking-database-unit");
EntityManager em = entityManagerFactory.createEntityManager();

em.getTransaction().begin();
em.persist(street);
em.getTransaction().commit(); 

[编辑2]

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是否有可能在启动时在hibernate缓存中创建实体而不提交到数据库？我创建DAO服务来管理另一个模块中的数据库（使用EJB连接）

据我在您的日志中所知，表创建得很好。@russellhoff在数据库中找不到关系，这对我来说也很奇怪。您是否尝试过使用JPA插入数据？也许你在反思问题的时候找错了地方database@crizzis我已经用insert data代码更新了我的问题“但下一个工件部署后表不会更新”，您尝试过更新吗？每次部署东西时都创建drops表。

<persistence xmlns="http://xmlns.jcp.org/xml/ns/persistence"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence
            http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd"
         version="2.1">
<persistence-unit name="parking-database-unit">
    <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>

    <class>soa.parking.database.domain.StreetData</class>
    <class>soa.parking.database.domain.ParkingSpaceData</class>
    <class>soa.parking.database.domain.TicketData</class>
    <properties>
        <property name="javax.persistence.jdbc.url" value="jdbc:postgresql://localhost:5432/parking" />
        <property name="javax.persistence.jdbc.user" value="postgres" />
        <property name="javax.persistence.jdbc.password" value="*********" />
        <property name="javax.persistence.jdbc.driver" value="org.postgresql.Driver" />

        <property name="hibernate.show_sql" value="true" />
        <property name="hibernate.format_sql" value="false" />
        <property name="hibernate.dialect" value="org.hibernate.dialect.PostgreSQL9Dialect" />
        <property name="hibernate.hbm2ddl.auto" value="create" />
    </properties>
</persistence-unit>

10:40:22,210 INFO  [org.hibernate.tool.hbm2ddl.SchemaExport] (ServerService Thread Pool -- 737) HHH000227: Running hbm2ddl schema export
10:40:22,212 INFO  [stdout] (ServerService Thread Pool -- 737) Hibernate: alter table StreetData_ParkingSpaceData drop constraint FKdbu6ec2cjp0lytdht5ct34r2
10:40:22,212 INFO  [stdout] (ServerService Thread Pool -- 737) Hibernate: alter table StreetData_ParkingSpaceData drop constraint FKnp5q60wl9xmiwpc8o1in8m7si
10:40:22,212 INFO  [stdout] (ServerService Thread Pool -- 737) Hibernate: drop table if exists ParkingSpaceData cascade
10:40:22,214 INFO  [stdout] (ServerService Thread Pool -- 737) Hibernate: drop table if exists StreetData cascade
10:40:22,215 INFO  [stdout] (ServerService Thread Pool -- 737) Hibernate: drop table if exists StreetData_ParkingSpaceData cascade
10:40:22,215 INFO  [stdout] (ServerService Thread Pool -- 737) Hibernate: drop table if exists TicketData cascade
10:40:22,215 INFO  [stdout] (ServerService Thread Pool -- 737) Hibernate: create table ParkingSpaceData (id  bigserial not null, empty boolean, primary key (id))
10:40:22,216 INFO  [stdout] (ServerService Thread Pool -- 737) Hibernate: create table StreetData (id  bigserial not null, name varchar(255), primary key (id))
10:40:22,217 INFO  [stdout] (ServerService Thread Pool -- 737) Hibernate: create table StreetData_ParkingSpaceData (StreetData_id int8 not null, parkingSpaces_id int8 not null, primary key (StreetData_id, parkingSpaces_id))
10:40:22,217 INFO  [stdout] (ServerService Thread Pool -- 737) Hibernate: create table TicketData (id  bigserial not null, createdDate timestamp, invalidateDate timestamp, streetId int8, primary key (id))
10:40:22,218 INFO  [stdout] (ServerService Thread Pool -- 737) Hibernate: alter table StreetData_ParkingSpaceData add constraint UK_fpad6yr01tqc30pvgc4decjq7 unique (parkingSpaces_id)
10:40:22,218 INFO  [stdout] (ServerService Thread Pool -- 737) Hibernate: alter table StreetData_ParkingSpaceData add constraint FKdbu6ec2cjp0lytdht5ct34r2 foreign key (parkingSpaces_id) references ParkingSpaceData
10:40:22,220 INFO  [stdout] (ServerService Thread Pool -- 737) Hibernate: alter table StreetData_ParkingSpaceData add constraint FKnp5q60wl9xmiwpc8o1in8m7si foreign key (StreetData_id) references StreetData
10:40:22,222 INFO  [org.hibernate.tool.hbm2ddl.SchemaExport] (ServerService Thread Pool -- 737) HHH000230: Schema export complete

StreetData street = new StreetData();
street.setName("A");

EntityManagerFactory entityManagerFactory = Persistence.createEntityManagerFactory("parking-database-unit");
EntityManager em = entityManagerFactory.createEntityManager();

em.getTransaction().begin();
em.persist(street);
em.getTransaction().commit();