diff --git a/mailbox-lan/src/main/java/com/biutag/lan/service/DataService.java b/mailbox-lan/src/main/java/com/biutag/lan/service/DataService.java
index 6bd8f0c..fa18f89 100644
--- a/mailbox-lan/src/main/java/com/biutag/lan/service/DataService.java
+++ b/mailbox-lan/src/main/java/com/biutag/lan/service/DataService.java
@@ -391,7 +391,7 @@ public class DataService extends ServiceImpl<DataMapper, Mail> {
         response.setCharacterEncoding("UTF-8");
         try (OutputStream out = response.getOutputStream()) {
             // 使用EasyExcel写入数据到输出流
-            ExcelWriter excelWriter = EasyExcel.write(out).build();
+            ExcelWriter excelWriter = EasyExcel.write(out).inMemory(Boolean.TRUE).build();
             WriteSheet writeSheet = EasyExcel.writerSheet("局长信箱即接即办信件三率统计").head(head).build();
             excelWriter.write(data1, writeSheet);
             excelWriter.finish();
@@ -445,7 +445,7 @@ public class DataService extends ServiceImpl<DataMapper, Mail> {
         response.setCharacterEncoding("UTF-8");
         try (OutputStream out = response.getOutputStream()) {
             // 使用EasyExcel写入数据到输出流
-            ExcelWriter excelWriter = EasyExcel.write(out).build();
+            ExcelWriter excelWriter = EasyExcel.write(out).inMemory(Boolean.TRUE).build();
             WriteSheet writeSheet = EasyExcel.writerSheet("局长信箱即接即办信件三率统计").head(head).automaticMergeHead(true).build();
             excelWriter.write(data1, writeSheet);
             excelWriter.finish();
@@ -539,7 +539,7 @@ public class DataService extends ServiceImpl<DataMapper, Mail> {
         response.setCharacterEncoding("UTF-8");
         try (OutputStream out = response.getOutputStream()) {
             // 使用EasyExcel写入数据到输出流
-            ExcelWriter excelWriter = EasyExcel.write(out).build();
+            ExcelWriter excelWriter = EasyExcel.write(out).inMemory(Boolean.TRUE).build();
             WriteSheet writeSheet = EasyExcel.writerSheet("局长信箱即接即办信件三率统计").head(head).automaticMergeHead(true).build();
             excelWriter.write(data1, writeSheet);
             excelWriter.finish();