预览文件
本文发布于 2023年11月17日,阅读 43 次,点赞
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预览文件
@RequestMapping(value = "/preview", method = RequestMethod.GET)
public void preview(String fileUrl,
String fileName,
HttpServletResponse response) {
InputStream inputStream = null;
try {
String encodedFileName = URLEncoder.encode(fileName, StandardCharsets.UTF_8.toString());
URL url = new URL(fileUrl);
String contentType = URLConnection.guessContentTypeFromName(url.getFile());
inputStream = url.openStream();
// 设置响应头信息
response.setContentType(contentType);
response.setHeader("Content-Disposition", "inline; filename*=UTF-8''" + encodedFileName);
response.setBufferSize(1024 * 1024);
// 将文件内容写入响应输出流中
IOUtils.copyLarge(inputStream, response.getOutputStream());
} catch (Exception e) {
log.error("preview file error.", e);
} finally {
try {
if (inputStream != null) {
inputStream.close();
}
} catch (IOException e) {
log.error("preview file inputStream close error.", e);
}
}
}