我想使用Hibernate/HBM2DDL模式生成作为使用Liquibase或Flyway之类的工具管理应用程序的SQL模式的起点.为此,我需要在我的项目中运行一个小的实用程序,该实用程序将打印出自动生成的模式.
I'd like to use the Hibernate/HBM2DDL schema generation as a starting point for managing my application's SQL schema using a tool like Liquibase or Flyway. To assist with that, I need a small utility in my project that I can run that will print out the auto-generated schema.
对于较旧的版本或Hibernate,这相对简单.像下面这样的东西会起作用:
With older versions or Hibernate, this was relatively simple. Something like the following would work:
EntityManagerFactory emf = null; // TODO: create your EMF the usual way. Class<? extends Dialect> hibernateDialectType = null; // TODO: e.g. HSQLDialect.class. Configuration hibernateConfig = new Configuration(); hibernateConfig.setProperty(Environment.DIALECT, hibernateDialectType.getName()); for (EntityType<?> entityType : emf.getMetamodel().getEntities()) { hibernateConfig.addAnnotatedClass(entityType.getJavaType()); } SchemaExport schemaExporter = new SchemaExport(hibernateConfig); schemaExporter.setFormat(true); schemaExporter.setDelimiter(";"); schemaExporter.create(Target.SCRIPT);但是至少从Hibernate 5.2开始,不能从Hibernate Configuration实例构建SchemaExport实用程序.
But as of at least Hibernate 5.2, the SchemaExport utility can no be built from a Hibernate Configuration instance.
那么今天怎么办呢?
推荐答案我认为没有充分的理由不通过
I see no good reason to not use standard JPA, via
Persistence.generateSchema(String persistenceUnitName, Map properties);这样,您就不会将自己绑定到任何特定的实现上,并且仍然可以通过使用javax.persistence.schema-generation.*属性来获取DDL脚本.
and that way you don't tie yourself to any particular implementation, and still can get a DDL script by use of the javax.persistence.schema-generation.* properties.
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您如何以编程方式生成Hibernate JPA模式?
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