在JDK17下，如下代码引用了cn.hutool.extra.servlet包下的 ServletUtil工具类的ServletUtil.write方法，执行时报”Cannot resolve method 'write(jakarta.servlet.http.HttpServletResponse, java.io.File)'“BUG，download方法通过cn.hutool.extra.servlet.ServletUtil的方法来实现文件下载的功能。
1 /**
2 * 录音下载
3 * @return
4 */
5 @Override
6 public void download(String id, HttpServletResponse response){
7 if (StrUtil.isEmpty(id)) {
8 throw new CrmException(CrmCodeEnum.CRM_CALL_DATA_QUERY_ERROR,"请求的数据格式");
9 }
10 //查询通话记录
11 CallRecord callRecord = baseMapper.selectById(id);
12 if(callRecord == null){
13 throw new CrmException(CrmCodeEnum.CRM_DATA_DELETED,"此通话记录");
14 }
15 if (StrUtil.isEmpty(callRecord.getFilePath())){
16 throw new CrmException(CrmCodeEnum.CRM_CALL_DOWNLOAD_ERROR);
17 }
18 if (Objects.equals(UploadFileEnum.LOCAL.getConfig(), callRecord.getCallUpload())) {
19 ServletUtil.write(response, FileUtil.file(callRecord.getFilePath()));
20 return;
21 }
22 UploadEntity entity = new UploadEntity(callRecord.getCallRecordId() + "", callRecord.getFileName(), callRecord.getSize().longValue(), callRecord.getBatchId(),"0");
23 entity.setPath(callRecord.getFilePath());
24 InputStream inputStream = FileServiceFactory.build().downFile(entity);
25 if (inputStream != null) {
26 final String contentType = ObjectUtil.defaultIfNull(FileUtil.getMimeType(callRecord.getFileName()), "application/octet-stream");
27 ServletUtil.write(response, inputStream, contentType, callRecord.getFileName());
28 }
29 }
若不使用ServletUtil工具类，可使用Spring的org.springframework.http.HttpHeaders和org.springframework.util.StreamUtils重写它来实现文件下载： 1 import org.springframework.http.HttpHeaders;
2 import org.springframework.util.StreamUtils;
3
4 public void download(String id, HttpServletResponse response) {
5 if (StrUtil.isEmpty(id)) {
6 throw new CrmException(CrmCodeEnum.CRM_CALL_DATA_QUERY_ERROR, "请求的数据格式");
7 }
8 // 查询通话记录
9 CallRecord callRecord = baseMapper.selectById(id);
10 if (callRecord == null) {
11 throw new CrmException(CrmCodeEnum.CRM_DATA_DELETED, "此通话记录");
12 }
13 if (StrUtil.isEmpty(callRecord.getFilePath())) {
14 throw new CrmException(CrmCodeEnum.CRM_CALL_DOWNLOAD_ERROR);
15 }
16 if (Objects.equals(UploadFileEnum.LOCAL.getConfig(), callRecord.getCallUpload())) {
17 File file = new File(callRecord.getFilePath());
18 try (InputStream inputStream = new FileInputStream(file)) {
19 response.setHeader(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename=" + callRecord.getFileName());
20 response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
21 StreamUtils.copy(inputStream, response.getOutputStream());
22 response.flushBuffer();
23 } catch (IOException e) {
24 throw new CrmException(CrmCodeEnum.CRM_CALL_DOWNLOAD_ERROR, "文件下载失败");
25 }
26 return;
27 }
28 UploadEntity entity = new UploadEntity(callRecord.getCallRecordId() + "", callRecord.getFileName(), callRecord.getSize().longValue(), callRecord.getBatchId(), "0");
29 entity.setPath(callRecord.getFilePath());
30 InputStream inputStream = FileServiceFactory.build().downFile(entity);
31 if (inputStream != null) {
32 try {
33 response.setHeader(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename=" + callRecord.getFileName());
34 response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
35 StreamUtils.copy(inputStream, response.getOutputStream());
36 response.flushBuffer();
37 } catch (IOException e) {
38 throw new CrmException(CrmCodeEnum.CRM_CALL_DOWNLOAD_ERROR, "文件下载失败");
39 }
40 }
41 }
标签：ServletUtil,cn,extra,callRecord,throw,new,response,CRM From： https://www.cnblogs.com/simyeo/p/17825901.html