一、服务启动类、pom.xml文件

@EnableEurekaClient //这里用到用到注册功能、表示该应用作为客户端注册到Eureka
@SpringBootApplication
public class OrderServer {
    public static void main(String[] args) {
        new SpringApplicationBuilder(OrderServer.class).web(true).run(args);
    }
}

<!-- SpringData-Jpa依赖-->
<dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<!-- mysql驱动:com.mysql.jdbc.Driver -->
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>5.1.29</version>
</dependency>

二、配置服务注册地址boostrap.yml、数据库配置application.yml--这里配置文件分开，方便维护

bootstrap.yml

spring:
  datasource:
    driver-class-name: com.mysql.jdbc.Driver
    url: jdbc:mysql://localhost:3306/order_test?useUnicode=true&characterEncoding=utf8&characterSetResults=utf8&userSSL=false
    username: root
    password: root
  jpa:
    database: MYSQL
    hibernate:
      ddl-auto: update
      dialect: org.hibernate.dialect.MySQL5InnoDBDialect
    show-sql: true

application.yml

server:
  port: 9014
spring:
  application:
    name: springCloud-order
eureka:
  instance:
    hostname: localhost
  client:
    register-with-eureka: true #作为服务注册
    fetch-registry: false #不需要同步数据
    service-url:
      defaultZone: http://localhost:9001/eureka/

三、编写接口--这里是新增操作，继承JpaRepository时已经具备基本的增删该查，原生sql要自己定义@query注解

@Entity
@Table(name = "t_order")
public class Order {

    private static final long serialVersionUID = 1L;

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO) //这里的ID选择自增
    private Long id;

    @Column(name = "num",nullable = false)
    private Long num;

    public Product(){

    }

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public Long getNum() {
        return num;
    }

    public void setNum(Long num) {
        this.num = num;
    }
}

@Repository
public interface OrderRepository extends JpaRepository<Order,Long> {

}

四、编写接口和实现类

public interface OrderService {

    void save(Order order);
}

@Service
public class OrderServiceImpl implements OrderService {

    @Autowired
    private OrderRepository orderRepository;

    @Override
    public void save(Order order) {
        orderRepository.save(order);
    }
}

五、controller层调用

@RestController
@RequestMapping("/order")
public class OrderContorller {

    @Autowired
    private OrderService orderService;

    @RequestMapping("/save")
    public void save(@RequestBody Order order){
        orderService.save(order);
    }
}