1.引入maven依赖，利用hutool的excel读取

Hutool-poi对excel读取、写入

        <dependency><groupId>cn.hutool</groupId><artifactId>hutool-all</artifactId><version>5.8.16</version></dependency>        <dependency><groupId>org.apache.poi</groupId><artifactId>poi-ooxml</artifactId><version>4.1.2</version></dependency><dependency><groupId>net.sf.jxls</groupId><artifactId>jxls-core</artifactId><version>1.0.6</version></dependency><dependency><groupId>net.sf.jxls</groupId><artifactId>jxls-reader</artifactId><version>1.0.3</version></dependency>

注意：说明 hutool-4.x的poi-ooxml 版本需高于 3.17（别问我3.8版本为啥不行，因为3.17 > 3.8 ） hutool-5.x的poi-ooxml 版本需高于 4.1.2 hutool-5.6.x支持poi-ooxml 版本高于 5.0.0 xercesImpl版本高于2.12.0（非必须）

2.导出模板创建，内容如下，也可以参考最上面上传资源

3.excel导入、导出工具类

package com.demo.utils;import cn.hutool.core.collection.CollUtil;
import cn.hutool.poi.excel.ExcelReader;
import cn.hutool.poi.excel.ExcelUtil;
import lombok.extern.log4j.Log4j2;
import net.sf.jxls.transformer.XLSTransformer;
import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
import org.apache.poi.ss.usermodel.Workbook;
import org.springframework.core.io.ClassPathResource;
import org.springframework.util.StopWatch;
import org.springframework.web.multipart.MultipartFile;import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.List;
import java.util.Map;/*** @Description: 导出工具类*/
@Log4j2
public class ExportUtil {/*** 导出excel** @param templatePath excel模板路径* @param listData     导出数据* @param fileName     导出文件名* @param request* @param response* @throws IOException*/public static void exportExcel(String templatePath,List<?> listData,String fileName,HttpServletRequest request,HttpServletResponse response) throws IOException {Map<String, Object> map = new HashMap<>();map.put("dataList", listData);response.setContentType("application/vnd.ms-excel;charset=utf-8");response.setHeader("Set-Cookie", "fileDownload=true; path=/");response.setHeader("Content-Disposition", "attachment;filename=" +new String(fileName.getBytes("utf-8"), "iso8859-1"));StopWatch watch = new StopWatch();watch.start();ClassPathResource classPathResource = new ClassPathResource(templatePath);try (InputStream inputStream = classPathResource.getInputStream();ServletOutputStream out = response.getOutputStream()) {XLSTransformer xlsTransformer = new XLSTransformer();Workbook workbook = xlsTransformer.transformXLS(inputStream, map);workbook.write(out);workbook.close();watch.stop();log.info("导出excel共耗时：{}毫秒！", watch.getTotalTimeMillis());} catch (InvalidFormatException e) {e.printStackTrace();log.error("导出失败：{}", e.getMessage());}}/*** 获取导入excel文件的数据** @param templatePath  模板地址* @param file          导入的excel文件* @return*/public static List<Map<String, Object>> getImportExcelData(String templatePath,MultipartFile file) {// 判断是否上传的是excelif ("xlsx".equals(file.getContentType()) || "xls".equals(file.getContentType())) {try (ExcelReader reader = ExcelUtil.getReader(file.getInputStream())) {// 获取模板excel表头List<Object> excelTitleList = getExcelTitle(templatePath);// 导入的文件excel表头List<Object> importTitleList = reader.readRow(0);boolean exist = importTitleList.containsAll(excelTitleList);// 判断导入的excel与模板的excel标题是否一致，即判断上传的模板是否正确if (!exist) {throw new RuntimeException("模板不匹配，请下载正确模板！");}// 读取excel数据StopWatch stopWatch = new StopWatch();stopWatch.start();List<Map<String, Object>> dataList = reader.readAll();if (CollUtil.isEmpty(dataList)) {throw new RuntimeException("导入文件的内容不能为空！");}stopWatch.stop();log.info("一共{}条数据，耗时{}毫秒！", dataList.size(), stopWatch.getTotalTimeMillis());return dataList;} catch (IOException e) {e.printStackTrace();log.error("导入的excel文件出错：{}", e.getMessage());throw new RuntimeException("导入的excel文件有问题！");}} else {throw new RuntimeException("请上传xls或xlsx格式文件！");}}/*** 根据模板excel获取excel表头** @param excelFilePath 模板地址* @return*/public static List<Object> getExcelTitle(String excelFilePath) {ClassPathResource classPathResource = new ClassPathResource(excelFilePath);try (InputStream in = classPathResource.getInputStream();) {ExcelReader reader = ExcelUtil.getReader(in, 0);return reader.readRow(0);} catch (Exception e) {e.printStackTrace();log.error("Excel读取失败:" + e.getMessage());throw new RuntimeException("Excel读取失败:" + e.getMessage());}}public static void main(String[] args) {List<Object> excelTitle = getExcelTitle("templates/excel/exports/test.xlsx");excelTitle.stream().forEach(x -> {System.out.println(x.toString());});}
}