private static final String CLIENT_CONFIG_FILE_NAME = "eureka";
private static final String CLIENT_RIBBON_CONFIG_FILE_NAME = "ribbon";

aa.ribbon.DeploymentContextBasedVipAddresses=aa //aa 為feign中使用的服務名稱
aa.ribbon.NIWSServerListClassName=com.netflix.niws.loadbalancer.DiscoveryEnabledNIWSServerList //服務調用策略，輪詢等
aa.ribbon.ServerListRefreshInterval=60000 //客戶端請求eureka 刷新aa 服務節(jié)點列表時間
ribbon.ConnectTimeout=50000000 //服務的超時時間
ribbon.ReadTimeout=50000000
eureka.properties
eureka.registration.enabled=false //服務是否注冊到eureka上
eureka.serviceUrl.default=http://discovery.ingageapp.com:9401/eureka //eureka地址
#eureka.preferSameZone=true(其余可以百度下cans參數太多不一一列舉
#eureka.shouldUseDns=false

private XsyServiceLocator() {
    try {
        ConfigurationManager.loadCascadedPropertiesFromResources(CLIENT_RIBBON_CONFIG_FILE_NAME); //1
        ConfigurationManager.loadCascadedPropertiesFromResources(CLIENT_CONFIG_FILE_NAME);   //2
    } catch (IOException e) {
        throw new IllegalStateException("Xsy client config load error! Please check your client.properties");
    }
    DiscoveryManager.getInstance().initComponent(new MyDataCenterInstanceConfig(), new DefaultEurekaClientConfig()); //3
}

public <T> T lookup(Class<T> clazz) {
    FeignClient feignClient = clazz.getAnnotation(FeignClient.class);// 1
    String serviceId = feignClient.value();//2
    T service = Feign.builder()
            .client(new RibbonClient(new OkhttpClient()))//3
            .encoder(new JacksonEncoder)//4
            .decoder(new JacksonDecoder)//5
            .logger(logger)//6
            .logLevel(Logger.Level.HEADERS)//7
            .requestInterceptor(new FeignInterceptor())//8
            .target(clazz, "http://" + serviceId);//9
    return service;
}

public class XsyServiceLocator {
    private static final String CLIENT_CONFIG_FILE_NAME = "eureka";
    private static final Object synRoot = new Object();
    private static final String CLIENT_CONFIG_CUSTOM_FILED_NAME = "eureka.name";
    private static final String CLIENT_RIBBON_CONFIG_FILE_NAME = "ribbon";
    private static final JacksonEncoder jacksonEncoder = new JacksonEncoder();
    private static final JacksonDecoder jacksonDecoder = new JacksonDecoder();
    private static final RibbonClient ribbonClient = new RibbonClient(new OkHttpClient());
    private static String ipAddress = null;
    private static boolean isLoadEureka = true;//為true表示需要加載默認eureka 配置文件如 crm，false則加載自定義eureka配置文件如paas-aggregator-service
    private static XsyFeignLogger logger = null;
    private XsyServiceLocator() {
        try {
            ConfigurationManager.loadCascadedPropertiesFromResources(CLIENT_RIBBON_CONFIG_FILE_NAME);
            ConfigurationManager.loadCascadedPropertiesFromResources(CLIENT_CONFIG_FILE_NAME);
            Object eurekaName = ConfigurationManager.getConfigInstance().getProperty(CLIENT_CONFIG_CUSTOM_FILED_NAME);
            if (eurekaName != null) {
                isLoadEureka = false;
            }
        } catch (IOException e) {
            throw new IllegalStateException("Xsy client config load error! Please check your client.properties");
        }
        while (isLoadEureka && ipAddress == null) {
            DiscoveryManager.getInstance().initComponent(new MyDataCenterInstanceConfig(), new DefaultEurekaClientConfig());
            ipAddress = DiscoveryManager.getInstance().getEurekaInstanceConfig().getIpAddress();
        }
    }

    public <T> T lookup(Class<T> clazz) {
        if (isLoadEureka && ipAddress == null) {
            DiscoveryManager.getInstance().initComponent(new MyDataCenterInstanceConfig(), new DefaultEurekaClientConfig());
            ipAddress = DiscoveryManager.getInstance().getEurekaInstanceConfig().getIpAddress();
        }
        FeignClient feignClient = clazz.getAnnotation(FeignClient.class);
        String serviceId = feignClient.value();
        if(logger == null){
            synchronized (synRoot){
                if(logger == null){
                    logger = new XsyFeignLogger(clazz);
                }
            }
        }
        T service = Feign.builder()
                .client(ribbonClient)
                .encoder(jacksonEncoder)
                .decoder(jacksonDecoder)
                .logger(logger)
                .logLevel(Logger.Level.HEADERS)
                .requestInterceptor(new FeignInterceptor())
                .target(clazz, "http://" + serviceId);
        return service;
    }

@FeignClient(contextId = "remoteUserService", value = ServiceNameConstants.UPMS_SERVICE)
public interface RemoteUserService {
 /**
  * 通過用戶名查詢用戶、角色信息
  *
  * @param username 用戶名
  * @param from     調用標志
  * @return R
  */
 @GetMapping("/user/info/{username}")
 R<UserInfo> info(@PathVariable("username") String username
   , @RequestHeader(SecurityConstants.FROM) String from);
}
@GetMapping("/user/info/{username}") 是服務Controller包中的（@Inner注解代表內部方法，不用權限直接調用，不會被網管攔截）
 /**
  * 獲取指定用戶全部信息
  *
  * @return 用戶信息
  */
 @Inner
 @GetMapping("/info/{username}")
 public R info(@PathVariable String username) {
  SysUser user = userService.getOne(Wrappers.<SysUser>query()
    .lambda().eq(SysUser::getUsername, username));
  if (user == null) {
   return R.failed(null, String.format("用戶信息為空 %s", username));
  }
  return R.ok(userService.findUserInfo(user));
 }

@Slf4j
@AllArgsConstructor
public class HzUserDetailsServiceImpl implements HzUserDetailsService {
 private final RemoteUserService remoteUserService;
 private final CacheManager cacheManager;
 
 /**
  * 用戶密碼登錄
  *
  * @param username 用戶名
  * @return
  * @throws UsernameNotFoundException
  */
 @Override
 @SneakyThrows
 public UserDetails loadUserByUsername(String username) {
  Cache cache = cacheManager.getCache(CacheConstants.USER_DETAILS);
  if (cache != null && cache.get(username) != null) {
   return (HzUser) cache.get(username).get();
  }
 
  R<UserInfo> result = remoteUserService.info(username, SecurityConstants.FROM_IN);
  UserDetails userDetails = getUserDetails(result);
  cache.put(username, userDetails);
  return userDetails;
 } 
}