添加导出方法

njcn-springboot/spingboot2.3.12/src/main/java/com/njcn/web/utils/ExcelUtil.java

@@ -73,6 +73,28 @@ public class ExcelUtil {
         }
     }
 
+    /**
+     * 指定名称、sheet名、title名、数据下载报表
+     *
+     * @param fileName 文件名
+     */
+    public static void exportExcel(String fileName, String sheetName, String title, Class<?> pojoClass, Collection<?> dataSet) {
+        HttpServletResponse response = HttpServletUtil.getResponse();
+        try (ServletOutputStream outputStream = response.getOutputStream()) {
+            fileName = URLEncoder.encode(fileName, CharsetUtil.UTF_8);
+            response.reset();
+            response.setHeader("Content-Disposition", "attachment; filename=\"" + fileName + "\"");
+            response.setContentType("application/octet-stream;charset=UTF-8");
+            ExportParams exportParams = new ExportParams();
+            exportParams.setSheetName(sheetName);
+            exportParams.setTitle(title);
+            Workbook workbook = ExcelExportUtil.exportExcel(exportParams, pojoClass, dataSet);
+            workbook.write(outputStream);
+        } catch (IOException e) {
+            log.error(">>> 导出数据异常：{}", e.getMessage());
+        }
+    }
+
     /**
      * 指定名称、sheet名（多个sheet）、数据（多组数据）下载报表
      *
@@ -115,7 +137,7 @@ public class ExcelUtil {
                 cellStyle.setDataFormat(format.getFormat("@"));
                 for (PullDown pullDown : pullDowns) {
                     if (pullDown.getIsText()) {
-                        ExcelUtil.selectListText(workbook, pullDown.getFirstCol(),cellStyle);
+                        ExcelUtil.selectListText(workbook, pullDown.getFirstCol(), cellStyle);
                     } else {
                         String colName = numberToExcelColumn(num);
                         int sum = pullDown.getStrings().stream().mapToInt(String::length).sum();
@@ -191,17 +213,17 @@ public class ExcelUtil {
     }
 
     /**
-     * @Description:
      * @param workbook
      * @param firstCol
+     * @Description:
      * @Author: wr
      * @Date: 2024/8/20 10:44
      */
-    public static void selectListText(Workbook workbook, int firstCol,CellStyle cellStyle) {
+    public static void selectListText(Workbook workbook, int firstCol, CellStyle cellStyle) {
         Sheet sheet = workbook.getSheetAt(0);
         for (int i = 2; i < 65535; i++) {
             Row row = sheet.getRow(i);
-            if(ObjectUtil.isNull(row)){
+            if (ObjectUtil.isNull(row)) {
                 row = sheet.createRow(i);
             }
             Cell cell = row.createCell(firstCol);