<spring-boot.version>2.1.8.RELEASE</spring-boot.version>
<spring-cloud.version>Greenwich.SR3</spring-cloud.version>

@SpringBootApplication(exclude = {DataSourceAutoConfiguration.class})
@EnableDiscoveryClient
public class GulimallGatewayApplication {
    public static void main(String[] args) {
        SpringApplication.run(GulimallGatewayApplication.class, args);
    }
}

spring.application.name=glmall-gateway
spring.cloud.nacos.discovery.server-addr=192.168.11.1:8848
server.port=88

spring.application.name=glmall-coupon
spring.cloud.nacos.config.server-addr=192.168.11.1:8848
spring.cloud.nacos.config.namespace=a791fa0e-cef8-47ee-8f07-5ac5a63ea061

spring:
    application:
        name: glmall-gateway

spring:
  cloud:
    gateway:
      routes:
        - id: baidu_route
          uri: http://www.baidu.com
          predicates:
            - Query=url,baidu

        - id: test_route
          uri: http://www.qq.com
          predicates:
            - Query=url,qq

會員服務(wù)（member）調(diào)優(yōu)惠券（coupon）服務(wù)
會員服務(wù)通過openFeign先去注冊中心找優(yōu)惠券服務(wù)

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

@RequestMapping("coupon/coupon")
public class CouponController {
    @Autowired
    private CouponService couponService;
    @RequestMapping("/member/list")
    public R membercoupons(){    //全系統(tǒng)的所有返回都返回R
        // 應(yīng)該去數(shù)據(jù)庫查用戶對于的優(yōu)惠券，但這個我們簡化了，不去數(shù)據(jù)庫查了，構(gòu)造了一個優(yōu)惠券給他返回
        CouponEntity couponEntity = new CouponEntity();
        couponEntity.setCouponName("滿100減10");//優(yōu)惠券的名字
        return R.ok().put("coupons",Arrays.asList(couponEntity));
    }

package com.yxj.gulimall.member;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.openfeign.EnableFeignClients;
@SpringBootApplication
@MapperScan("com.yxj.gulimall.member.dao")
@EnableDiscoveryClient
@EnableFeignClients(basePackages="com.yxj.gulimall.member.feign")
public class GulimallMemberApplication {
    public static void main(String[] args) {
        SpringApplication.run(GulimallMemberApplication.class, args);
    }
}

package com.yxj.gulimall.member.feign;
import com.yxj.common.utils.R;
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.RequestMapping;
@FeignClient("gulimall-coupon") //告訴spring cloud這個接口是一個遠程客戶端，要調(diào)用coupon服務(wù)，再去調(diào)用coupon服務(wù)/coupon/coupon/member/list對應(yīng)的方法
public interface CouponFeignService {
    @RequestMapping("/coupon/coupon/member/list") 
    public R membercoupons();//得到一個R對象
}

@RestController
@RequestMapping("member/member")
public class MemberController {
    @Autowired
    private MemberService memberService;
    @Autowired
    CouponFeignService couponFeignService;
    @RequestMapping("/coupons")
    public R test(){
        MemberEntity memberEntity = new MemberEntity();
        memberEntity.setNickname("張三");
        R membercoupons = couponFeignService.membercoupons(); //假設(shè)張三去數(shù)據(jù)庫查了后返回了張三的優(yōu)惠券信息
        // 打印會員和優(yōu)惠券信息
        return R.ok().put("member",memberEntity).put("coupons",membercoupons.get("coupons"));
    }

http://localhost:8000/member/member/coupons
{"msg":"success","code":0,"coupons":[{"id":null,"couponType":null,"couponImg":null,"couponName":"滿100減10","num":null,"amount":null,"perLimit":null,"minPoint":null,"startTime":null,"endTime":null,"useType":null,"note":null,"publishCount":null,"useCount":null,"receiveCount":null,"enableStartTime":null,"enableEndTime":null,"code":null,"memberLevel":null,"publish":null}],"member":{"id":null,"levelId":null,"username":null,"password":null,"nickname":"張三","mobile":null,"email":null,"header":null,"gender":null,"birth":null,"city":null,"job":null,"sign":null,"sourceType":null,"integration":null,"growth":null,"status":null,"createTime":null}}

public class R extends HashMap<String, Object> {
    public static R ok() {
        return new R();
    }
    public R put(String key, Object value) {
        super.put(key, value);
        return this;
    }
}