!209 RemoteUserServiceImpl中selectListByIds和selectUserIdsByRoleIds方法新增判空

* 删除多余依赖
* 改成ArrayList
* 查询前判空

ruoyi-modules/ruoyi-system/src/main/java/org/dromara/system/dubbo/RemoteUserServiceImpl.java

@@ -310,6 +310,9 @@ public class RemoteUserServiceImpl implements RemoteUserService {
      */
     @Override
     public List<RemoteUserVo> selectListByIds(List<Long> userIds) {
+        if (CollUtil.isEmpty(userIds)) {
+            return new ArrayList<>();
+        }
         List<SysUserVo> sysUserVos = userService.selectUserByIds(userIds, null);
         return MapstructUtils.convert(sysUserVos, RemoteUserVo.class);
     }
@@ -322,6 +325,9 @@ public class RemoteUserServiceImpl implements RemoteUserService {
      */
     @Override
     public List<Long> selectUserIdsByRoleIds(List<Long> roleIds) {
+        if (CollUtil.isEmpty(roleIds)) {
+            return new ArrayList<>();
+        }
         return userService.selectUserIdsByRoleIds(roleIds);
     }