一直受限于用企鹅在电脑和手机之间传文件
避免不了要在其他端登录而造成一定的风险性
就自己做了一个文件传输系统
实现
- 后台：Spring Boot
- 数据库：Mysql
- 前端：React
- Android：Java
工具
- Intellij IDEA 2020.1.2
- WebStorm 2020.1.2
- Android Studio
- Microsoft Edge
- Android 手机
Api
- 上传：/upload POST
- 下载：/download GET
- 预览：/preview GET
- 列表：/list GET
@RestController
@RequestMapping("/file")
@AllArgsConstructor
public class FileAdminApi {
@Autowired
private IFileService fileService;
@PostMapping("/upload")
public ResponseResult uploadFile(HttpServletResponse response, @RequestParam("file") MultipartFile file) {
return fileService.uploadFile(response, file);
}
@GetMapping("/preview/{fileId}")
public ResponseResult previewFile(HttpServletResponse response, HttpServletRequest request, @PathVariable("fileId") String fileId) {
return fileService.previewFile(response, request, fileId);
}
@GetMapping("/download/{fileId}")
public ResponseResult downloadFile(HttpServletResponse response, @PathVariable("fileId") String fileId) {
return fileService.downloadFile(response, fileId);
}
@GetMapping("/list")
public ResponseResult listFile() {
return fileService.listFile();
}
}
java部分Api实现
@Override
public ResponseResult uploadFile(HttpServletResponse response, MultipartFile file) {
if (file == null) {
return ResponseResult.FAILED(CONTENT_NULL);
}
String dateStr = simpleDateFormat.format(new Date());
String datePath = ROOT + File.separator + dateStr;
File datePathDir = new File(datePath);
if (!datePathDir.exists()) {
datePathDir.mkdirs();
}
String contentType = file.getContentType();
log.info(TAG, contentType);
if (TextUtils.isEmpty(contentType)) {
return ResponseResult.FAILED("文件类型不支持！");
}
contentType = contentType.split("/")[1];
String typePath = datePath + File.separator + contentType;
File typePathDir = new File(typePath);
if (!typePathDir.getParentFile().exists()) {
typePathDir.mkdirs();
}
String originalFilename = file.getOriginalFilename();
String path = typePath + File.separator + originalFilename;
File target = new File(path);
if (!target.getParentFile().exists()) {
target.getParentFile().mkdirs();
}
try {
if (!target.exists()) {
target.createNewFile();
}
file.transferTo(target);
cool.hyz.blog.pojo.File fileDb = new cool.hyz.blog.pojo.File();
fileDb.setId(idWorker.nextId() + "");
fileDb.setName(originalFilename);
fileDb.setType(contentType);
fileDb.setPath(path);
fileDb.setCreateTime(new Date());
fileDb.setUpdateTime(new Date());
fileDao.save(fileDb);
return ResponseResult.SUCCESS("上传成功！").setData(fileDb);
} catch (IOException e) {
e.printStackTrace();
return ResponseResult.FAILED(e.getMessage());
}
}
@Override
public ResponseResult downloadFile(HttpServletResponse response, String fileId) {
if (TextUtils.isEmpty(fileId)) {
return ResponseResult.FAILED(CONTENT_NULL);
}
cool.hyz.blog.pojo.File file = fileDao.findOneById(fileId);
String path = file.getPath();
if (TextUtils.isEmpty(path)) {
return ResponseResult.FAILED("找不到文件路径");
}
try {
byte[] buff = new byte[1024];
response.setHeader("Content-Disposition", "attachment;filename=" + file.getName());
FileInputStream fis = null;
OutputStream os = null;
fis = new FileInputStream(path);
int size = fis.available(); // 得到文件大小
byte data[] = new byte[size];
fis.read(data); // 读数据
fis.close();
response.setContentType(file.getType()); // 设置返回的文件类型
os = response.getOutputStream();
os.write(data);
os.flush();
os.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
return ResponseResult.FAILED(GET_FAILED);
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
javaAndroid下载
@Override
public void ondFileClickToDownload(int position, GetDownloadList.DataBean dataBean) {
String url = DOWNLOAD_FILE + dataBean.getId();//下载链接（api）
DownloadManager.Request request = new DownloadManager.Request(Uri.parse(url));
request.setAllowedOverRoaming(false);
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE);
request.setTitle(dataBean.getName());
request.setDescription("文件正在下载中......");
request.setVisibleInDownloadsUi(true);
//设置下载的路径
File file = new File(getContext().getExternalFilesDir(Environment.DIRECTORY_DOWNLOADS), dataBean.getName());
request.setDestinationUri(Uri.fromFile(file));
String path = file.getAbsolutePath();
//获取DownloadManager
if (downloadManager == null) {
downloadManager = (DownloadManager) getContext().getSystemService(Context.DOWNLOAD_SERVICE);
}
//将下载请求加入下载队列
if (downloadManager != null) {
downloadId = downloadManager.enqueue(request);
}
}
javaUI就不贴出来了，写得很简陋
就先到这里啦
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