fix：增加空判断

haoban-manage3-service/src/main/java/com/gic/haoban/manage/service/service/out/impl/MessageApiServiceImpl.java

@@ -296,10 +296,12 @@ public class MessageApiServiceImpl implements MessageApiService {
             } else {
                 //部门没有修改
                 List<TabHaobanStaffDepartmentRelated> list = staffDepartmentRelatedService.listStaffDepartmentByStaffId(staff.getStaffId());
-                for (TabHaobanStaffDepartmentRelated tabHaobanStaffDepartmentRelated : list) {
-                    departmentIds.append(tabHaobanStaffDepartmentRelated.getDepartmentId()).append(",");
+                if (CollectionUtils.isNotEmpty(list)) {
+                    for (TabHaobanStaffDepartmentRelated tabHaobanStaffDepartmentRelated : list) {
+                        departmentIds.append(tabHaobanStaffDepartmentRelated.getDepartmentId()).append(",");
+                    }
+                    departmentIds = new StringBuilder(departmentIds.substring(0, departmentIds.length() - 1));
                 }
-                departmentIds = new StringBuilder(departmentIds.substring(0, departmentIds.length() - 1));
             }
             StaffDTO staffDTO = EntityUtil.changeEntityByJSON(StaffDTO.class, staff);
             staffApiService.staffEdit(staffDTO, departmentIds.toString());