[优化]优惠券导出为CSV格式

mallinkService/src/main/java/com/iformall/service/ExcelService.java

@@ -71,7 +71,7 @@ public class ExcelService {
     private void defaultExportCsv(List<?> list, Class<?> pojoClass, String fileName, HttpServletResponse response, CsvExportParams exportParams, boolean template) {
         try {
             response.setCharacterEncoding("UTF-8");
-            response.setHeader("content-Type", "application/vnd.ms-excel");
+            response.setHeader("content-Type", "application/vnd.ms-csv");
             response.setHeader("Content-Disposition",
                     "attachment;filename=" + URLEncoder.encode(fileName, "UTF-8"));
             CsvExportUtil.exportCsv(exportParams, pojoClass, list, response.getOutputStream());