建一個static 文件夾, 位置如圖, 把example.pdf 放進去
@RequestMapping(path = "/download", method = RequestMethod.GET)
public ResponseEntity<?> download(String param) throws IOException {
File file = new File("static/報名簡章.pdf");
if (file.exists()) {
logger.info(file.getAbsolutePath());
} else {
logger.info("no");
}
Path path = Paths.get(file.getAbsolutePath());
ByteArrayResource resource = new ByteArrayResource(Files.readAllBytes(path));
HttpHeaders headers = new HttpHeaders();
String filename = new String("報名簡章.pdf".getBytes("UTF-8"), "ISO_8859_1");
headers.setContentDispositionFormData("attachment", filename);
return ResponseEntity.ok()
.headers(headers)
.contentLength(file.length())
.contentType(MediaType.parseMediaType("application/pdf"))
.body(resource);
}
參考
https://stackoverflow.com/questions/5673260/downloading-a-file-from-spring-controllers
關於java String
String objects in Java don't have an encoding (*).
The only thing that has an encoding is a byte[].
https://stackoverflow.com/questions/5729806/encode-string-to-utf-8