Spring Cloud微服务之Feign怎么用

Feign是一个声明式的http客服端,目标是降低Http API的复杂性.可以用它来处理微服务间的调用.

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@GetMapping("/{id}")public ResponseEntity> getById(@PathVariable("id") final long id) {  final Account account = service.getById(id);  log.info("getById:[{}]", account);  return Rs.ok(account);}

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    org.springframework.cloud    spring-cloud-starter-openfeign

@FeignClient(name = "DEMO-ACCOUNT")public interface AccountService {  @GetMapping("/demo-account/account/{id}")  ResponseEntity> getById(@PathVariable("id") final long id);}

@Slf4j@RestController@RequestMapping("/account")public class AccountController {  @Resource  private AccountService service;
  @GetMapping("/get-by-id")  @ApiOperation("通过id获取账户详情")  public ResponseEntity> getById() {    final ResponseEntity> response = service.getById(1L);    final Account account = Rs.requireNonNull(response, ResCode.ACCOUNT_FAIL_GET_BY_ID);    return Rs.ok(account);  }}

@EnableFeignClients(basePackages = "io.github.ramerf.feign.service")@EnableDiscoveryClient@SpringBootApplication(scanBasePackages = {"io.github.ramerf.wind", "io.github.ramerf.feign"})public class FeignApplication {  public static void main(String[] args) {    SpringApplication.run(FeignApplication.class, args);  }}

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