CS

通过Bean Validation 可以减少大量重复代码，可以很容通过注解配置约束，可以将约束与模型凝聚在一起。

Bean Validation是一套标准规范，JSR 303 ，而在Spring中提供了一套自己的Validation接口与实现，不要搞混。 1、Spring自己提供的 例子 org.springframework.validation.Validator  2、Bean Validation 例子 个人比较喜欢Bean Validation，约

Single Table Inheritance Class Table Inheritance Concrete Table Inheritance

Spring ROO

1、Transaction Script 2、Domain Model 3、Table  Moduel

Benefits and drawbacks Optimistic locking has a couple of advantages: ■ It is easy to implement in a JDBC/iBATIS application, and it is supported by many persistence frameworks. ■ Optimistic locki

Benefits and drawbacks Pessimistic locking has several advantages: ■ Unlike optimistic locking, pessimistic locking does not require any schema changes. ■ It prevents a transaction from overwritin