the call of the controller layer can go to httpclient. It is not very clear about the problem you described

use feign

@EnableFeignClients

@FeignClient(value = "${appsweb.appis.name}", path = "${appsweb.appis.context-path}", configuration = FeignConfiguration.class)
public interface AlarmBaseInfoService {
        @RequestMapping(value = "/alarmBaseInfo/selectDetailByAlarmId", method = RequestMethod.POST, consumes="application/json")
        AjaxMessage<List<AlarmBaseInfo>> selectDetailByAlarmId(@RequestParam(value = "alarmID", required = false) String alarmID);
}

you can specify dependencies in the editor, but you can't find dependencies when packaging. You can set up the city maven father and son project, and you can pack it together. Also, package the B module into jar and rely on the A project