SpringBoot连接MySql

1、新建Spring Boot项目，依赖选择JPA（spring-boot-starter-data-jpa）和Web（spring-bootstarter-web）。

3、定义映射实体类

4、定义Controller类@RestControllerpublic class PersonCtroller { @Autowir髫潋啜缅ed PersonServer personServer; @RequestMapping("/rollback") public Person rollback(Person person){ return personServer.savePersonWithRollBack(person); } @RequestMapping("/norollback") public Person noRollback(Person person){ return personServer.savePersonWithOutRollBack(person);}}

5、定义数据访问层public interface PersonRepository extends JpaRepository<Person, Long> {}

6、定义Server层@Servicepublic cla衡痕贤伎ss PersonServerImp implements PersonServer { @Autowired PersonRepository personRepository; @Transactional(rollbackFor = {IllegalArgumentException.class}) @Override public Person savePersonWithRollBack(Person person) { Person p = personRepository.save(person); if (p.getName().equals("xxx")){ throw new IllegalArgumentException("用户已存在,数据会回滚"); } return p; } }

7、浏览器访问