Hibernate简单入门，快速上手

1，创建一个springboot项目

2，配置properties文件

spring.datasource.url=jdbc:mysql://124.70.190.246:3306/spring?serverTimezone=UTC spring.datasource.username=root spring.datasource.password=111 spring.jpa.hibernate.ddl-auto=update//开启数据库自动更新 spring.jpa.show-sql=true//开启sql语句显示

3，创建实体类

@Entity @Table public class Teacher { @Id @GeneratedValue(strategy = GenerationType.IDENTITY)//自增 private Integer id; @Column private String name; @Column private String local; /** *Constructor有参，无参 *Getting，Setting *toString */ }

4，编写service接口

public interface TeacherService { void saveTeacher(Teacher teacher); Teacher findTeacher(int id); }

5，编写数据库操作接口，Teacher类操作方法接口库 🐖：JpaRepository<T,ID> T:哪个实体类的方法接口库 ID:这个实体类的主键

public interface TeacherRepository extends JpaRepository<Teacher,Integer> { Teacher findById(int id); //需要什么方法可以自己任意挑选 }

6，Service的实现类Impl 🐖：加@Service标签 注入方法接口类@Resource/@Autowried(都可用但有区别) 重写方法@Override

@Service public class TeacherSericeImp implements TeacherService { @Resource TeacherRepository teacherRepository; @Override public void saveTeacher(Teacher teacher) { Teacher result =teacherRepository.save(teacher); return ; } @Override public Teacher findTeacher(int id) { Teacher teacher = teacherRepository.findById(id); return teacher; } }

7，Controller类用来相应前端请求 🐖：加@RestController注解，注入service接口，相应PostMapping("/index)请求

@RestController public class TeacherController { @Autowired private TeacherService teacherService; @PostMapping("/index") public String saveTeacher(@RequestParam("id") int id, @RequestParam("name") String name, @RequestParam("local") String local){ Teacher teacher = new Teacher(id,name,local); teacherService.saveTeacher(teacher); return "success"; } }