引入依赖

<!--引入hibernate-->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<!--mysql驱动-->
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>8.0.12</version>
</dependency>
<dependency>
    <groupId>org.projectlombok</groupId>
    <artifactId>lombok</artifactId>
    <optional>true</optional>
</dependency>

配置文件

server:
  port: 8080

spring:
  application:
    name: springboot-hibernate
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    username: root
    password: 123456
    url : jdbc:mysql://local:3306/test?serverTimezone=GMT%2B8&useUnicode=true&characterEncoding=UTF-8&useSSL=false
  jpa:
    database: mysql
    show-sql: true # 是否打印 sql 语句
    hibernate:
      ddl-auto: update
    properties:
      hibernate:
        dialect: org.hibernate.dialect.MySQL5Dialect

代码

Bean

@Entity
@Data
@Builder
@Table(name = "t_user")
public class UserBean {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private String id;

    @Column
    private String username;
    @Column
    private String password;

}

Dao层

@Repository
public interface UserRepository extends JpaRepository<UserBean,String> {
}

Service层

public interface UserService {

    UserBean add(UserBean userBean);

    List<UserBean> queryAll();
}

实现类

@Service
public class UserServiceImpl implements UserService {

    @Autowired
    private UserRepository userRepository;

    @Override
    public UserBean add(UserBean userBean) {
        UserBean user = userRepository.save(userBean);
        return user;
    }

    @Override
    public List<UserBean> queryAll() {
        List<UserBean> userBeans = userRepository.findAll();
        return userBeans;
    }
}

Controller层

@RestController
@RequestMapping("user")
public class UserController {

    @Autowired
    private UserService userService;

    @RequestMapping("findAll")
    public List<UserBean> findAll(){
        return userService.queryAll();
    }
}