deptId is null

boman-modules/boman-system/src/main/java/com/boman/system/service/impl/SysDeptServiceImpl.java

@@ -315,6 +315,10 @@ public class SysDeptServiceImpl implements ISysDeptService
      */
     @Override
     public List<SysDept> listChildrenDepts(Long deptId) {
+        if (ObjectUtils.isEmpty(deptId)) {
+            return null;
+        }
+
         List<SysDept> allDepts = selectDeptList(new SysDept());
         SysDept sysDept = ObjectUtils.filterOne(allDepts, dept -> deptId.equals(dept.getId()));
         List<SysDept> returnData = Lists.newArrayListWithCapacity(16);