启动报错：
Description: The bean 'xxx' could not be registered. A bean with that name has already been defined and overriding is disabled. Action: Consider renaming one of the beans or enabling overriding by setting spring.main.allow-bean-definition-overriding=true
这个报错是因为默认情况下feign不允许一个服务定义多个接口类，如果出现多个接口类会报Bean冲突；
例如：
@Component
@FeignClient(name = "user-service",path = "/user")
public interface UserFeignService1 {
@RequestMapping("/register")
public ResultModel register(@RequestBody xxxDto dto);
}
@Component
@FeignClient(name = "user-service",path = "/user")
public interface UserFeignService2 {
@RequestMapping("/login")
public ResultModel register(@RequestBody xxxDto dto);
}
解决方案：报错信息提示我们加spring.main.allow-bean-definition-overriding=true配置（有时候不起作用），也可以通过加在@FeignClient注解加contextId属性；
例如：
@Component
@FeignClient(name = "user-service",path = "/user",contextId = "user1")
public interface UserFeignService1 {
@RequestMapping("/register")
public ResultModel register(@RequestBody xxxDto dto);
}
