已经设置了 .contentType(MediaType.APPLICATION_PDF)
报错：
Resolved [org.springframework.http.converter.HttpMessageNotWritableException: No converter for [class org.springframework.core.io.FileSystemResource] with preset Content-Type 'application/pdf']
代码：
public ResponseEntity<FileSystemResource> download(String shippingLabelFile) throws IOException {
Path path = Paths.get(filePath, shippingLabelFile).normalize();
log.info("下载文件名称：{}",shippingLabelFile);
if (Files.notExists(path) || Files.isDirectory(path)) {
ResponseEntity.notFound();
}
try {
File file = new File(filePath + "/" + shippingLabelFile);
HttpHeaders headers = new HttpHeaders();
headers.add("Cache-Control", "no-cache, no-store, must-revalidate");
headers.add("Content-Disposition", "attachment; filename=" + shippingLabelFile);
headers.add("Pragma", "no-cache");
headers.add("Expires", "0");
headers.add("Last-Modified", new Date().toString());
headers.add("ETag", String.valueOf(System.currentTimeMillis()));
return ResponseEntity
.ok()
.headers(headers)
.contentLength(file.length())
.contentType(MediaType.APPLICATION_PDF)
.body(new FileSystemResource(file));
} catch (Exception e) {
e.printStackTrace();
log.info("dfsId:{}下载文件失败，cause:{}",shippingLabelFile,e);
}
return null;
}
