SpringCloud远程服务调用实战笔记

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

package top.ctong.gulimall.common.feign;

import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import top.ctong.gulimall.common.utils.R;

import java.util.Map;
@FeignClient("gulimall-coupon")
@RequestMapping("/coupon/coupon")
public interface CouponFeignService {

    /**
     * 通过自定义参数查询列表
     * @param params 自定义参数
     * @return R
     * @author Clover You
     * @date 2021/11/17 09:11
     */
    @RequestMapping("/list")
    R list(@RequestParam Map<String, Object> params);
}

package top.ctong.gulimall.coupon.controller;

@RestController
@RequestMapping("coupon/coupon")
public class CouponController {
    @Autowired
    private CouponService couponService;
    /**
     * 列表
     */
    @RequestMapping("/list")
    //@RequiresPermissions("coupon:coupon:list")
    public R list(@RequestParam Map<String, Object> params){
        PageUtils page = couponService.queryPage(params);
        return R.ok().put("page", page);
    }
}

@EnableFeignClients(basePackages = "top.ctong.gulimall.common.feign")
@EnableDiscoveryClient
@MapperScan("top.ctong.gulimall.member.dao")
@SpringBootApplication
public class GulimallMemberApplication {

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

} 

package top.ctong.gulimall.member.controller;

@RestController
@RequestMapping("member/member")
public class MemberController {

    private final CouponFeignService couponFeignService;

    @Autowired
    public MemberController(CouponFeignService couponFeignService, MemberService memberService) {
        this.couponFeignService = couponFeignService;
        this.memberService = memberService;
    }
  
    @RequestMapping("/testFeignInvoke")
    public R testFeignInvoke() {
        Map<String, Object> parem = new HashMap<>(10);
        return couponFeignService.list(parem);
    }
}

<dependency>
  <groupId>org.springframework.cloud</groupId>
  <artifactId>spring-cloud-starter-loadbalancer</artifactId>
  <version>3.0.4</version>
</dependency>

<dependency>
  <groupId>com.alibaba.cloud</groupId>
  <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
  <exclusions>
    <exclusion>
      <groupId>com.netflix.ribbon</groupId>
      <artifactId>ribbon</artifactId>
    </exclusion>
  </exclusions>
</dependency>