摘要： //jpa动态创建EntityManagerFactory 态设置数据库连接EntityManager;createEntityManagerFactory(String persistenceUnitName, Map properties)方法中properties的参数将覆盖persistence.xml文件配置的参数。 Map properties = new HashMap(); properties.put("hibernate.connection.url","jdbc:sqlserver://localhost;DatabaseName=test"); properties.put("hibernate.connection.username","sa"); properties.put("hibernate.connection.password","1234"); EntityManagerFactory emf = Persistence.createEntityManagerFactory 阅读全文