diff --git a/pigx-common/pigx-common-excel/src/main/java/com/pig4cloud/pigx/common/excel/converters/StringArrayConverter.java b/pigx-common/pigx-common-excel/src/main/java/com/pig4cloud/pigx/common/excel/converters/StringArrayConverter.java
index 3a50b5ae0..8a446a9e7 100644
--- a/pigx-common/pigx-common-excel/src/main/java/com/pig4cloud/pigx/common/excel/converters/StringArrayConverter.java
+++ b/pigx-common/pigx-common-excel/src/main/java/com/pig4cloud/pigx/common/excel/converters/StringArrayConverter.java
@@ -24,6 +24,10 @@ public enum StringArrayConverter implements Converter<String[]> {
 	 * 未指定目标单元格类型时，FESOD 使用 null 作为导出转换器的类型键。
 	 */
 	WRITE_INSTANCE {
+		/**
+		 * 提供未指定目标单元格类型时使用的导出转换器查找键。
+		 * @return null，与 FESOD 默认导出时的目标单元格类型匹配
+		 */
 		@Override
 		public CellDataTypeEnum supportExcelTypeKey() {
 			return null;