SpringCloud Feign的使用简介

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

@FeignClient(value = "PROVIDER-NAME")
public interface DeptClientService {
// 请求的路径需与服务提供者的路径一致
    @RequestMapping(value = "/dev/add")
    boolean add(Dept dept);

    @RequestMapping(value = "/dev/{id}")
    Dept queryByID(@PathVariable("id") Long id );

    @PostMapping(value = "/dev/list")
    List<Dept> queryAll();
}

@RestController
public class ConsumerController {
    @Autowired
    private DeptClientService service;
    @RequestMapping("/consumer/get/{id}")
    public Dept getByID(@PathVariable("id") Long id){
        return this.service.queryByID(id);
    }
    @RequestMapping("/consumer/add")
    public boolean add(String dname){
        Dept dept = new Dept();
        dept.setDname(dname);
        return this.service.add(dept);
    }
    @RequestMapping("/consumer/list")
    public List<Dept> list(){
        return this.service.queryAll();
    }

}

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

public class ConsumerController {
    @Autowired
    private RestTemplate template;
    private static final String url="http://PROVIDER-NAME";
    @RequestMapping("/consumer/get/{id}")
    public Dept getByID(@PathVariable long id){
                                                //请求的路径，返回的对象
        Dept getEntity = template.getForObject(url + "/dev/" + id, Dept.class);
        return getEntity;
    }
    @RequestMapping("/consumer/add")
    public boolean add(String dname){
        Dept dept = new Dept();
        dept.setDname(dname);
        System.out.println(dept);
        //请求的路径，传递的参数，返回的对象
        return template.postForObject(url+ "/dev/add",dept,Boolean.class);
    }
    @RequestMapping("/consumer/list")
    public List<Dept> list(){
        //请求的路径，返回的对象
        return template.postForObject(url+"/dev/list",void.class,List.class);
    }

}

@RestController
public class ConsumerController {
    @Autowired
    private DeptClientService service;
    @RequestMapping("/consumer/get/{id}")
    public Dept getByID(@PathVariable("id") Long id){
        return this.service.queryByID(id);
    }
    @RequestMapping("/consumer/add")
    public boolean add(String dname){
        Dept dept = new Dept();
        dept.setDname(dname);
        return this.service.add(dept);
    }
    @RequestMapping("/consumer/list")
    public List<Dept> list(){
        return this.service.queryAll();
    }

}