download

import org.springframework.core.io.FileSystemResource;
import org.springframework.core.io.InputStreamResource;
import org.springframework.http.HttpHeaders;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import java.io.File;
import java.io.IOException;


    @RequestMapping(value = "/downloadFile", method = RequestMethod.GET)
    public ResponseEntity<InputStreamResource> downloadAll() throws IOException {
          
   
    	//  准备好你要下载的文件
        File file = GetYourFile();
        if(file!= null && file.exists()) {
          
   
            FileSystemResource resource = new FileSystemResource(file);
            HttpHeaders headers = new HttpHeaders();
            headers.add("Cache-Control", "no-cache, no-store, must-revalidate");
            headers.add("Content-Disposition", String.format("attachment; filename="%s"", resource.getFilename()));
            headers.add("Pragma", "no-cache");
            headers.add("Expires", "0");
            return ResponseEntity
                    .ok()
                    .headers(headers)
                    .contentLength(file.length())
                    .contentType(MediaType.parseMediaType("application/octet-stream"))
                    .body(new InputStreamResource(
                            resource.getInputStream()
                    ));
        }
        return null;
    }

upload

@PostMapping("/uploadFile")
    public Boolean uploadHeadImage(
            @RequestParam(value = "file") MultipartFile file,
            @RequestParam String filename,
            @RequestParam String creator
    ) {
          
   
	InputStream uploadStream = getStream(file);
        if (uploadStream == null) {
          
   
            return Boolean.false;
        }
	// 在下面处理文件
	/**
     * TODO 处理的你文件
     */
	
}