从angular typescript发送多个文件到spring，并返回zip文件夹下载?

Question

我想将数组中的多个文件发送到spring并创建一个zip文件夹用于下载

Answer 1

UploadController:

@Autowired
StorageService storageService;
@PostMapping("/upload")
public ResponseEntity<ResponseMessage> uploadFiles(@RequestParam("files") MultipartFile[] files) {
String message = "";
try {
storageService.zip(files);
message = "Uploaded the files successfully";
return ResponseEntity.status(HttpStatus.OK).body(new ResponseMessage(message));
} catch (Exception e) {
message = "Fail to upload files!";
return ResponseEntity.status(HttpStatus.EXPECTATION_FAILED).body(new ResponseMessage(message));
}
}

StorageService

public void zip(MultipartFile[] files) {
List<Path> filepaths = new ArrayList();
for (MultipartFile file : files) {
Path filepath = Paths.get("my/tmp/dir", file.getOriginalFilename());
filepaths.add(filepath);
try (OutputStream os = Files.newOutputStream(filepath)) {
os.write(file.getBytes());
}
}
File zip = new File("path/to/my/zip");
try { zip.createNewFile(); }
FileOutputStream output = null;
try { output = new FileOutputStream(zip); }
ZipOutputStream out = new ZipOutputStream(output);
try {
for (Path filepath : filepaths) {
File f = new File(filepath);
FileInputStream input = new FileInputStream(f);
ZipEntry e = new ZipEntry(f.getName());
out.putNextEntry(e);
byte[] bytes = new byte[1024];
int length;
while((length = input.read(bytes)) >= 0) {
out.write(bytes, 0, length);
}
input.close();
}          
out.close();
output.close();
}
}