update ruoyi-admin/src/main/java/com/ruoyi/web/controller/system/SysDictDataController.java.

ruoyi-admin/src/main/java/com/ruoyi/web/controller/system/SysDictDataController.java

@@ -73,7 +73,10 @@ public class SysDictDataController extends BaseController
     @GetMapping(value = "/type/{dictType}")
     public AjaxResult dictType(@PathVariable String dictType)
     {
-        return AjaxResult.success(dictTypeService.selectDictDataByType(dictType));
+		List<SysDictData> data = dictTypeService.selectDictDataByType(dictType);
+		if (data == null)
+			data = new ArrayList<>();
+		return AjaxResult.success(data);
     }
 
     /**