Hibernate的Entity等同于YII的Model

每个Entity是数据表的一行记录。

public class Main {
    private static final SessionFactory ourSessionFactory;

    static {
        try {
            Configuration configuration = new Configuration();
            //"hibernate.cfg.xml"
            configuration.configure("hibernate.cfg.xml");
            ourSessionFactory = configuration.buildSessionFactory();
        } catch (Throwable ex) {
            throw new ExceptionInInitializerError(ex);
        }
    }

    public static Session getSession() throws HibernateException {
        return ourSessionFactory.openSession();
    }

    public static void main(final String[] args) throws Exception {
        final Session session = getSession();
        try {
            System.out.println("querying all the managed entities...");
            final Map metadataMap = session.getSessionFactory().getAllClassMetadata();
            for (Object key : metadataMap.keySet()) {
                final ClassMetadata classMetadata = (ClassMetadata) metadataMap.get(key);
                final String entityName = classMetadata.getEntityName();
                final Query query = session.createQuery("from " + entityName);
                System.out.println("executing: " + query.getQueryString());
                List list = query.list();
                //列表查询回来的所有记录，观察后续的list变量吧。
                for (Object o : list) {
                    System.out.println("  " + o);
                }
            }
        } finally {
            session.close();
        }
    }
}