Update CmsPrefrenceAreaService.java

mall-admin/src/main/java/com/macro/mall/service/CmsPrefrenceAreaService.java

@@ -9,5 +9,8 @@ import java.util.List;
  * Created by macro on 2018/6/1.
  */
 public interface CmsPrefrenceAreaService {
+    /**
+     * 获取所有优选专区
+     */
     List<CmsPrefrenceArea> listAll();
 }