1、實(shí)體映射
實(shí)體類 <--> 數(shù)據(jù)表
@GeneratedValue：主鍵生成方式為自增，Hibernate自動生成HIBERNATE_SEQUENCE的序列
2、validation
@Service @Validated public class MyBean { public Archive findByCodeAndAuthor(@Size(min = 8, max = 10) String code, Author author) { ... } }
