fix(excel): 修复排产表导出功能中的日期格式和表格合并问题

- 添加SimpleDateFormat用于日期格式化处理
- 将计划日期格式化为yyyy-MM-dd格式避免显示异常
- 修正表格合并区域从38列扩展到40列
- 为整个合并区域的所有单元格应用标题样式
- 确保合并单元格后样式的一致性显示

klp-aps/src/main/java/com/klp/aps/service/impl/ApsPlanSheetServiceImpl.java

@@ -30,6 +30,7 @@ import javax.servlet.http.HttpServletResponse;
 import java.io.IOException;
 import java.net.URLEncoder;
 import java.nio.charset.StandardCharsets;
+import java.text.SimpleDateFormat;
 import java.util.List;
 import java.util.Map;
 import java.util.Collection;
@@ -142,12 +143,17 @@ public class ApsPlanSheetServiceImpl implements IApsPlanSheetService {
             Long planSheetId = req.getPlanSheetId();
             if (planSheetId != null) {
                 ApsPlanSheetVo planSheet = queryById(planSheetId);
-                t0.setCellValue(planSheet.getPlanDate().toString() + "————" + planSheet.getLineName() + "————" + planSheet.getPlanCode());
+                // 格式化日期
+                String dateStr = "";
+                if (planSheet.getPlanDate() != null) {
+                    SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
+                    dateStr = sdf.format(planSheet.getPlanDate());
+                }
+                t0.setCellValue(dateStr + "————" + planSheet.getLineName() + "————" + planSheet.getPlanCode());
             } else {
                 t0.setCellValue("快速排产表");
             }
-            sheet.addMergedRegion(new CellRangeAddress(0, 0, 0, 38));
+            // 1. 先创建标题样式
-
             CellStyle titleStyle = wb.createCellStyle();
             titleStyle.setAlignment(HorizontalAlignment.CENTER);
             titleStyle.setVerticalAlignment(VerticalAlignment.CENTER);
@@ -155,7 +161,19 @@ public class ApsPlanSheetServiceImpl implements IApsPlanSheetService {
             titleFont.setBold(true);
             titleFont.setFontHeightInPoints((short) 15);
             titleStyle.setFont(titleFont);
-            t0.setCellStyle(titleStyle);
+
+            // 2. 合并区域
+            CellRangeAddress titleRegion = new CellRangeAddress(0, 0, 0, 40);
+            sheet.addMergedRegion(titleRegion);
+
+            // 3. 给【整个合并区域】设置样式
+            for (int i = titleRegion.getFirstColumn(); i <= titleRegion.getLastColumn(); i++) {
+                Cell cell = title.getCell(i);
+                if (cell == null) {
+                    cell = title.createCell(i);
+                }
+                cell.setCellStyle(titleStyle);
+            }
 
             String[] headers = new String[]{
                 "产线", "排产日期", "排产单号", "排产类型", "排产人", "修改人", "计划备注",