update

mec-web/src/main/java/com/ym/mec/web/controller/ExportController.java

@@ -171,6 +171,9 @@ public class ExportController extends BaseController {
     @PostMapping("export/managerDownload")
     @PreAuthorize("@pcs.hasPermissions('export/managerDownload')")
     public HttpResponseResult managerDownload(@RequestBody ExportDto exportDto){
+        if(exportDto.getHeadColumns() == null || exportDto.getHeadColumns().size() == 0){
+            throw new BizException("请选择导出字段");
+        }
         Map<String, Object> queryInfo = exportDto.getQueryInfo();
         if(queryInfo == null){
             queryInfo = new HashMap<>(10);