diff --git a/physical-module-system/physical-system-biz/src/main/java/org/jeecg/modules/database/controller/ExperimentController.java b/physical-module-system/physical-system-biz/src/main/java/org/jeecg/modules/database/controller/ExperimentController.java
index ce01a8a..7553dbc 100644
--- a/physical-module-system/physical-system-biz/src/main/java/org/jeecg/modules/database/controller/ExperimentController.java
+++ b/physical-module-system/physical-system-biz/src/main/java/org/jeecg/modules/database/controller/ExperimentController.java
@@ -653,8 +653,11 @@ public class ExperimentController extends JeecgController<Experiment, IExperimen
         RadiationProcessExportDTO detail = new RadiationProcessExportDTO();
         List<ExperimentSampleInfo> sampleInfoList = radiationProcess.getSampleInfoList();
         detail.setRadiateType(name);
-        detail.setSampleModel(sampleInfoList.stream().map(s -> s.getSampleModel()).collect(Collectors.joining(",")));
-        detail.setSampleType(sampleInfoList.stream().map(s -> s.getSampleType()).collect(Collectors.joining(",")));
+        if (CollUtil.isNotEmpty(sampleInfoList)) {
+            detail.setSampleModel(sampleInfoList.stream().map(s -> s.getSampleModel()).collect(Collectors.joining(",")));
+            detail.setSampleType(sampleInfoList.stream().map(s -> s.getSampleType()).collect(Collectors.joining(",")));
+        }
+
         //detail.setMeasurementRate(radiationProcess.getMeasurementRate());
         detail.setPlannedMeasurementRate(
                 xgy.stream().filter(v -> StringUtils.isNotBlank(v.getPlannedMeasurementRate())).map(v -> v.getPlannedMeasurementRate())