SpringBoot集成EasyExcel快速入门Demo

package com.miaxis.excel.controller; import com.alibaba.excel.EasyExcel; import com.alibaba.excel.util.ListUtils; import com.alibaba.excel.util.MapUtils; import com.alibaba.fastjson2.JSON; import com.miaxis.excel.dao.UploadDAO; import com.miaxis.excel.entity.DownloadData; import com.miaxis.excel.entity.UploadData; import com.miaxis.excel.listener.UploadDataListener; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.*; import org.springframework.web.multipart.MultipartFile; import javax.servlet.http.HttpServletResponse; import java.io.IOException; import java.net.URLEncoder; import java.util.Date; import java.util.List; import java.util.Map; @RestController @RequestMapping("/excel") public class ExcelController { @Autowired private UploadDAO uploadDAO; /** * 文件下载（失败了会返回一个有部分数据的Excel） * <p> * 1. 创建excel对应的实体对象 参照{@link DownloadData} * <p> * 2. 设置返回的 参数 * <p> * 3. 直接写，这里注意，finish的时候会自动关闭OutputStream,当然你外面再关闭流问题不大 */ @GetMapping("download") public void download(HttpServletResponse response) throws IOException { // 这里注意 有同学反应使用swagger 会导致各种问题，请直接用浏览器或者用postman response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"); response.setCharacterEncoding("utf-8"); // 这里URLEncoder.encode可以防止中文乱码 当然和easyexcel没有关系 String fileName = URLEncoder.encode("测试", "UTF-8").replaceAll("\\+", "%20"); response.setHeader("Content-disposition", "attachment;filename*=utf-8''" + fileName + ".xlsx"); EasyExcel.write(response.getOutputStream(), DownloadData.class).sheet("模板").doWrite(data()); } /** * 文件下载并且失败的时候返回json（默认失败了会返回一个有部分数据的Excel） * * @since 2.1.1 */ @GetMapping("downloadFailedUsingJson") public void downloadFailedUsingJson(HttpServletResponse response) throws IOException { // 这里注意 有同学反应使用swagger 会导致各种问题，请直接用浏览器或者用postman try { response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"); response.setCharacterEncoding("utf-8"); // 这里URLEncoder.encode可以防止中文乱码 当然和easyexcel没有关系 String fileName = URLEncoder.encode("测试", "UTF-8").replaceAll("\\+", "%20"); response.setHeader("Content-disposition", "attachment;filename*=utf-8''" + fileName + ".xlsx"); // 这里需要设置不关闭流 EasyExcel.write(response.getOutputStream(), DownloadData.class).autoCloseStream(Boolean.FALSE).sheet("模板") .doWrite(data()); } catch (Exception e) { // 重置response response.reset(); response.setContentType("application/json"); response.setCharacterEncoding("utf-8"); Map<String, String> map = MapUtils.newHashMap(); map.put("status", "failure"); map.put("message", "下载文件失败" + e.getMessage()); response.getWriter().println(JSON.toJSONString(map)); } } /** * 文件上传 * <p> * 1. 创建excel对应的实体对象 参照{@link UploadData} * <p> * 2. 由于默认一行行的读取excel，所以需要创建excel一行一行的回调监听器，参照{@link UploadDataListener} * <p> * 3. 直接读即可 */ @PostMapping("upload") @ResponseBody public String upload(MultipartFile file) throws IOException { EasyExcel.read(file.getInputStream(), UploadData.class, new UploadDataListener(uploadDAO)).sheet().doRead(); return "success"; } private List<DownloadData> data() { List<DownloadData> list = ListUtils.newArrayList(); for (int i = 0; i < 10; i++) { DownloadData data = new DownloadData(); data.setString("字符串" + 0); data.setDate(new Date()); data.setDoubleData(0.56); list.add(data); } return list; } }