1. 使用FileSystemResource,以文件系統的絕對路徑的方式訪問靜態資源
FileSystemResource file= new FileSystemResource("c:\\xx\\xxx\\1.txt");
@GetMapping("/down")
public ResponseEntity<FileSystemResource> download(@RequestParam("uri") String uri) throws IOException {
File file = new File(uri);
if (!file.isFile()) {
throw new ServiceException("文件不存在");
}
String filename = FilenameUtils.getName(uri);
HttpHeaders headers = new HttpHeaders();
headers.add("Content-Disposition", "attachment;filename=" + URLEncoder.encode(filename, "UTF-8"));
HttpStatus status = HttpStatus.OK;
return new ResponseEntity<>(new FileSystemResource(file), headers, status);
}
2. 使用緩存流，邊讀邊寫
@GetMapping("/down")
public void download(@RequestParam("uri") String uri, HttpServletResponse response) {
File file = new File(uri);
if (!file.isFile()) {
throw new ServiceException("文件不存在");
}
String filename = FilenameUtils.getName(uri);
response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(filename, "UTF-8"));
try (FileInputStream fileInputStream = new FileInputStream(file);
BufferedInputStream bufferedInputStream = new BufferedInputStream(fileInputStream);
BufferedOutputStream bufferedOutputStream = new BufferedOutputStream(response.getOutputStream())) {
FileCopyUtils.copy(bufferedInputStream, bufferedOutputStream);
} catch(Exception e){
} finally {
}
}
@GetMapping("/down")
public void download(@RequestParam("uri") String uri, HttpServletResponse response) {
File file = new File(uri);
if (!file.isFile()) {
throw new ServiceException("文件不存在");
}
String filename = FilenameUtils.getName(uri);
response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(filename, "UTF-8"));
try (FileInputStream fileInputStream = new FileInputStream(file);
BufferedInputStream bufferedInputStream = new BufferedInputStream(fileInputStream);
BufferedOutputStream bufferedOutputStream = new BufferedOutputStream(response.getOutputStream())) {
byte[] buffer_ = new byte[1024];
int n = bufferedInputStream.read(buffer_);
while(n != -1){
bufferedOutputStream.write(buffer_);
n = bufferedInputStream.read(buffer_);
}
bufferedInputStream.close();
bufferedOutputStream.close();
} catch(Exception e){
} finally {
}
}
3. 文件存儲到oss或者是七牛雲，繞過服務器下載等方式
參考:
https://my.oschina.net/pwh19920920/blog/4699776?tdsourcetag=s_pctim_aiomsg
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版權聲明：本文為CSDN博主「shiboyuan0410」的原創文章，遵循CC 4.0 BY-SA版權協議，轉載請附上原文出處鏈接及本聲明。
原文鏈接：https://blog.csdn.net/shiboyuan0410/article/details/115209291