在feign的实现类里这么写
try {
//这里获取租户id
String tenantId = AuthUtil.getTenantId();
//切换数据源
DynamicDataSourceContextHolder.push(tenantId);
//自定义逻辑
xxxxxx
} catch (Exception exception) {
throw new ServiceException(exception.getMessage());
} finally {
//切回主数据源
DynamicDataSourceContextHolder.poll();
}