问题描述
我有一个与表关联的 Hibernate 数据类;想象像这样的实体Person:
I have a Data Class for Hibernate associated to a table; imagine the Entity Person like this:
@Entity @org.hibernate.annotations.Proxy(lazy=false) @Table(name="Person", schema="MySchema") @Inheritance(strategy=InheritanceType.SINGLE_TABLE) public class ProfileData implements Serializable { private static final long serialVersionUID = -844564646821609090L; public PersonData() { } @Column(name="idPerson", nullable=false, unique=true) @Id ...
我需要按此表的年份创建历史表:Person2010、Person2011、Person2012... 是否可以不创建新的数据对象?也许通过参数...?我不知道.
I need to create historic tables by years of this table: Person2010, Person2011, Person2012... Is it possible without creating new Data Objects? Maybe by a parameter...? I don′t know.
Entity类是一样的,表名和构造函数都变了.
The Entity class is the same, changing the table name and the constructor.
推荐答案
另一种架构,更复杂但优雅:
Another one Architecture, more complez but elegant:
YES,您可以使用 NamingStrategies 更改表名:
YES, You can change the table names using NamingStrategies:
public class MyNamingStrategy extends DefaultNamingStrategy { ... @Override public String tableName(String tableName) { return tableName+yearSuffixTable; } ... }
而且,当您想使用 _year 表时,您必须使用 Hibernate 创建一个覆盖 rhe 表名称的会话:
And, when you wanna to use the _year tables, you must to create a session with Hibernate that override rhe table names:
SessionFactory sessionFactory; Configuration config = new AnnotationConfiguration() .configure("hibernate.cfg.xml") .setNamingStrategy( new MyNamingStrategy () ); sessionFactory = config.buildSessionFactory(); session = sessionFactory.openSession();
对于我的架构,我按年创建一个会话并将其存储到应用程序映射中,以便在需要时访问.
For my architecture I create a session by year and store it into Application map for access when I need it.
谢谢.