开始整活，依赖包。

<dependency><groupId>com.alibaba</groupId><artifactId>easyexcel</artifactId><version>3.2.1</version>
</dependency>

@GetMapping("/download")public void download(HttpServletResponse response) {ExcelUtil.exportExcel(new ArrayList<>(), "xxxx导入模板", BasicIntegralDownloadVo.class, response);}

2.实体

@ExcelIgnoreUnannotated
@Data
public class BasicIntegralDownloadVo {private static final long serialVersionUID = 1L;@ColumnWidth(value = 8)@ExcelProperty(value = {"积分制积分明细表","户名"},index = 0)private String name;@ColumnWidth(value = 8)@ExcelProperty(value = {"积分制积分明细表","人口类型"},index = 1)private String populationType;@ColumnWidth(value = 8)@ExcelProperty(value = {"积分制积分明细表","门牌号"},index = 2)private String houseNumber;@ColumnWidth(value = 8)@ExcelProperty(value = {"积分制积分明细表","联系方式"},index = 3)private String mobile;@ColumnWidth(value = 8)@ExcelProperty(value = {"积分制积分明细表","身份证"},index = 4)private String idCard;@ColumnWidth(value = 8)@ExcelProperty(value = {"积分制积分明细表","积分年度"},index = 5)private String integralYear;@ColumnWidth(value = 10)@ExcelProperty(value = {"积分制积分明细表","农户零星养殖鸡鸭棚规范管理", "第1季度"},index = 6)private Integer type1;@ColumnWidth(value = 10)@ExcelProperty(value = {"积分制积分明细表","农户零星养殖鸡鸭棚规范管理", "第2季度"},index = 7)private Integer type2;@ColumnWidth(value = 10)@ExcelProperty(value = {"积分制积分明细表","农户零星养殖鸡鸭棚规范管理", "第3季度"},index = 8)private Integer type3;@ColumnWidth(value = 10)@ExcelProperty(value = {"积分制积分明细表","农户零星养殖鸡鸭棚规范管理", "第4季度"},index = 9)private Integer type4;@ColumnWidth(value = 10)@ExcelProperty(value = {"积分制积分明细表","小菜园规范种植、禁止毁绿占绿进行种植", "第1季度"},index = 10)private Integer type5;@ColumnWidth(value = 10)@ExcelProperty(value = {"积分制积分明细表","小菜园规范种植、禁止毁绿占绿进行种植", "第2季度"},index = 11)private Integer type6;@ColumnWidth(value = 10)@ExcelProperty(value = {"积分制积分明细表","小菜园规范种植、禁止毁绿占绿进行种植", "第3季度"},index = 12)private Integer type7;@ColumnWidth(value = 10)@ExcelProperty(value = {"积分制积分明细表","小菜园规范种植、禁止毁绿占绿进行种植", "第4季度"},index =13)private Integer type8;
}

	public static <T> void exportExcel(List<T> list, String sheetName, Class<T> clazz, HttpServletResponse response) {try {resetResponse(sheetName, response);ServletOutputStream os = response.getOutputStream();exportExcel(list, sheetName, clazz, false, os);} catch (IOException e) {throw new RuntimeException("导出Excel异常");}}/*** 重置响应体*/public static void resetResponse(String sheetName, HttpServletResponse response) throws UnsupportedEncodingException {String filename = encodingFilename(sheetName);FileUtils.setAttachmentResponseHeader(response, filename);response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet;charset=UTF-8");}/*** 导出excel** @param list      导出数据集合* @param sheetName 工作表的名称* @param clazz     实体类* @param merge     是否合并单元格* @param os        输出流*/public static <T> void exportExcel(List<T> list, String sheetName, Class<T> clazz, boolean merge, OutputStream os) {ExcelWriterSheetBuilder builder = EasyExcel.write(os, clazz).autoCloseStream(false)// 自动适配.registerWriteHandler(new LongestMatchColumnWidthStyleStrategy())// 大数值自动转换 防止失真.registerConverter(new ExcelBigNumberConvert()).sheet(sheetName);if (merge) {// 合并处理器builder.registerWriteHandler(new CellMergeStrategy(list, true));}builder.doWrite(list);}

	/*** 导入*/@PostMapping("/import")public R<Void> importResident(MultipartFile file) throws IOException {ExcelResult<BasicIntegralDownloadVo> result = ExcelUtil.importExcel2(file.getInputStream(), BasicIntegralDownloadVo.class, new BasicIntegralListener());return R.ok(result.getAnalysis());}导入监听器//todo 无奈,东西有点多，不想写了噗嗤。