Hibernate 4.3，当构建SessionFactory时为什么我们必须提供两次属性？ [英] Hibernate 4.3, when building SessionFactory why do we have to supply the properties twice?

问题描述

使用Hibernate 4.3.5当你想创建一个SessionFactory（例如单元测试），你必须提供属性两次：

Using the Hibernate 4.3.5 when you want to create a SessionFactory (e.g. unit testing) you will have to supply the properties twice:

1. 一次配置


2. 第二次将设置应用于服务注册表构建器

示例如下：

Properties properties = new Properties();
properties.put("hibernate.dialect", "org.hibernate.dialect.HSQLDialect");
properties.put("hibernate.connection.driver_class", "org.hsqldb.jdbcDriver");
properties.put("hibernate.connection.url", "jdbc:hsqldb:mem:test");
properties.put("hibernate.connection.username", "sa");
properties.put("hibernate.connection.password", "");
properties.put("hibernate.hbm2ddl.auto", "update");
properties.put("hibernate.show_sql", "true");

SessionFactory sessionFactory = new Configuration()
    .addProperties(properties)
    .addAnnotatedClass(SecurityId.class)
    .buildSessionFactory(
            new StandardServiceRegistryBuilder()
                    .applySettings(properties)
                    .build()
);  

如果我评论：

//.addProperties(properties)

然后hibernate.hbm2ddl。 auto属性不彻底：

Then the "hibernate.hbm2ddl.auto" property doesn't get thorough:

Caused by: org.hsqldb.HsqlException: user lacks privilege or object not found: SECURITYID

如果我评论：

//.applySettings(properties)

<没有设置'hibernate.dialect'时，对DialectResolutionInfo的访问不能为空

I the get:

org.hibernate.HibernateException: Access to DialectResolutionInfo cannot be null when 'hibernate.dialect' not set 

Coda可在 GitHub 。

推荐答案

尝试以下代码，它使用配置中的属性。

Try the following code, it uses properties from configuration.

Configuration configuration = new Configuration();
configuration.addAnnotatedClass(SecurityId.class);
configuration.addProperties(properties);
configuration.configure();
ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder().applySettings(configuration.getProperties()).build();
SessionFactory sessionFactory = configuration.buildSessionFactory(serviceRegistry);

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