后台代码，这是基础方法，还要根据使用调用

public static void exportExcel(HttpServletResponse response, String sheetName, String fileName, String[] header, List content) throws IOException {// 清空response response.reset(); // 设置response的Header response.setHeader("Content-disposition", "attachment; filename=" + new String(fileName.getBytes("gbk"), "iso8859-1") + ".xlsx"); response.setContentType("application/vnd.ms-excel; charset=gb2312"); Sheet sheet = new Sheet(1, 0); sheet.setSheetName(sheetName); // 设置自适应宽度 sheet.setAutoWidth(Boolean.TRUE); // 设置表头 List list = new ArrayList<>(); for (int i = 0; i < header.length; i++) { list.add(Collections.singletonList(header[i])); } sheet.setHead(list); OutputStream outputStream = null; ExcelWriter writer = null; try { outputStream = new BufferedOutputStream(response.getOutputStream()); writer = EasyExcelFactory.getWriter(outputStream); List> data = https://www.it610.com/article/new ArrayList>(); for (int i = 0; i < content.size(); i++) { List