1.复制一个springboot消费者

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2.添加Feign依赖

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 <!--feign-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-feign</artifactId>
            <version>1.4.6.RELEASE</version>
        </dependency>

3.创建service层调用

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创建DeptClientService接口

@Service
@FeignClient(value = "SPRINGCLOUD-PROVIDER-DEPT")
public interface DeptClientService {
    @GetMapping("/dept/get/{id}")
    public Dept queryById(@PathVariable("id") Long id);

    @GetMapping("/dept/list")
    public List<Dept> queryAll();

    @PostMapping("/dept/add")
    public boolean addDept(Dept dept);

}

@FeignClient(value = "SPRINGCLOUD-PROVIDER-DEPT")一行注解直接注册到了服务

4.改变调用方式

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删去原来的RestTemplate

装配Feign的接口调用类

@Autowired
    private DeptClientService deptClientService;

最终使用deptClientService的方法调用服务

@RestController
@EnableEurekaClient
public class DeptConsumerController {

    @Autowired
    private DeptClientService deptClientService;

    @RequestMapping("/consumer/dept/get/{id}")
    public Dept get(@PathVariable("id") Long id){
          return this.deptClientService.queryById(id);
    }


    @RequestMapping("/consumer/dept/add")
    public boolean add(Dept dept){
        return this.deptClientService.addDept(dept);
    }

    @RequestMapping("/consumer/dept/list")
    public List<Dept> queryAll(){
        return this.deptClientService.queryAll();
    }
}

5.装配启动类

只要开启一个注解并且配置正确的扫描包即可
@EnableFeignClients(basePackages = {"com.chk.springcloud"})

@SpringBootApplication
@EnableEurekaClient
@EnableFeignClients(basePackages = {"com.chk.springcloud"})
public class FeignDeptConsumer_fegin {
    public static void main(String[] args) {
        SpringApplication.run(FeignDeptConsumer_fegin.class,args);
    }
}

6.访问

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