該錯誤原因是springboot2.0以后，默認不允許同一個服務中接口中存在多個feign實體bean，即@FeignClient(“相同服務名”)會報錯
解決辦法：在bootstrap.yml文件中添加如下配置，注意該配置不能配置到配置中心
spring.main.allow-bean-definition-overriding=true
The bean 'cyb-weixin.FeignClientSpecification' could not be registered. A bean with that name has already been defined and overriding is disabled.
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