1.引入jpa依赖
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-jpa</artifactId> </dependency> <dependency>
2.创建application.yml
spring: datasource: url: jdbc:mysql://localhost/bike?serverTimezone=UTC username: root password: 123456 driver-class-name: com.mysql.jdbc.Driver #更新自己数据表结构 控制台看到sql jpa: hibernate: ddl-auto: update show-sql: true
3.创建实体类User.java
@Entity //配置JPA映射关系 和数据表映射 @Table(name = "tbl_user") //和数据库表对应，没写的话时默认类名小写 public class User { @Id //标记主键 @GeneratedValue(strategy = GenerationType.IDENTITY) //自主键 private Integer id; @Column(name = "last_name",length = 50)//和数据表相对应的列 private String lastName; @Column //省略的话默认就是属性名 private String email; @Override public String toString() { return "User{" + "id=" + id + ", lastName='" + lastName + '\'' + ", email='" + email + '\'' + '}'; } public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getLastName() { return lastName; } public void setLastName(String lastName) { this.lastName = lastName; } public String getEmail() { return email; } public void setEmail(String email) { this.email = email; } }
4.创建UserJpaReposity接口
//通过JpaRepository 来完成对数据库的操作 DAO public interface UserResposity extends JpaRepository<User,Integer> { }
5.UserController.java
public class UserController { @Autowired UserResposity userResposity; @GetMapping("/user/{id}") public User getUser(@PathVariable("id") Integer id){ User user = userResposity.getOne(id); return user; } @GetMapping("/user") public User insertUser(User user){ User save = userResposity.save(user); return save; } }
