使用openFeign调用其他微服务_openfeign调用其他微服务的接口

1. 微服务模块引入依赖

  	<dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-openfeign</artifactId>
        <version>2.1.0.RELEASE</version>
    </dependency>
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2.提供方的接口

@RestController
@RequestMapping("coupon/coupon")
public class CouponController {
  
    @RequestMapping("/member")
    public R memberCoupons() {
        CouponEntity couponEntity =  new CouponEntity();
        couponEntity.setAmount(new BigDecimal(12));
        couponEntity.setCode("you");
        couponEntity.setCouponName("一张优惠券");
        return R.ok().put("coupons", Arrays.asList(couponEntity));
    }
}
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3.在调用方创建一个feign 接口类，里面放入需要调用其他微服务调用的所有接口签名

@FeignClient("mall-coupon")  
public interface CouponFeignService {
    	@RequestMapping("/coupon/coupon/member")
    	public R memberCoupons();
}
//mall-coupon为微服务注册时的application Name
//@RequetMapping里的注解必须为接口详细请求地址
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4.使用注解@EnableFeignClients开启远程调用功能

@EnableFeignClients(basePackages = "com.sz.mall.member.feign")
@SpringBootApplication
public class MallMemberApplication {

    public static void main(String[] args) {
        SpringApplication.run(MallMemberApplication.class, args);
    }

}
	
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5. 调用方接口获取其他服务数据

@RestController
@RequestMapping("member/member")
public class MemberController {
    
    @Autowired
    private CouponFeignService couponFeignService;

    @RequestMapping("/coupons")
    public R getCouponByMember() {
        MemberEntity memberEntity = new MemberEntity();
        memberEntity.setNickname("小怪");

        R memberCoupons = couponFeignService.memberCoupons();
        return R.ok().put("member", memberEntity).put("coupons", memberCoupons.get("coupons"));
    }
	
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6.测试结果