使用OpenFeign远程调用别的微服务（member调用coupon中的方法)

1、在项目wysmall中创建两个模块

2、在微服务模块中引入openFeign

<dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
        </dependency>

3、在mall-coupon中创建被调用的方法

@RestController
@RequestMapping("coupon/coupon")
public class CouponController {
    @Autowired
    private CouponService couponService;


    @RequestMapping("/member/list")
    public R memberCoupons(){
        CouponEntity couponEntity = new CouponEntity();
        couponEntity.setCouponName("满100减10");
        return R.ok().put("coupons", Arrays.asList(couponEntity));
    }
}

4、在mall-member中创建feign接口

@FeignClient("mall-coupon")
public interface CouponFeignService {

    /**
     * 调用优惠券微服务中的方法
     * @return
     */
    @RequestMapping("coupon/coupon/member/list")
    public R memberCoupons();
}

5、在mall-member启用feign

6、实现调用

@RequestMapping("coupon")
public R getCoupon(){
    MemberEntity memberEntity = new MemberEntity();
    memberEntity.setNickname("tom");
    R r = couponFeignService.memberCoupons();
    return R.ok().put("member", memberEntity).put("coupons", r.get("coupons"));
}