图片上传与下载

private static final String IMAGE_TYPE_PROMPT = "文件格式仅支持jpg、png";
private static final String IMAGE_FILE_SIZE_PROMPT = "文件格式仅支持jpg、png";

public String saveUserImageToDir(MultipartFile multipartFile, String dir) throws AobpException, IOException {
 ???if (!ImageUtil.checkIsImgByName(multipartFile.getOriginalFilename())) {
 ???????throw new AobpException(ExceptionConstant.PARAMS_INVALID, IMAGE_TYPE_PROMPT);
 ???}
 ???if (!ImageUtil.fileSizeLegal(multipartFile.getSize())) {
 ???????throw new AobpException(ExceptionConstant.PARAMS_INVALID, IMAGE_FILE_SIZE_PROMPT);
 ???}
 ???return UploadUtil.upload(multipartFile,dir);
}

public class UploadUtil {

 ???/**
 ????* @return dest file name
 ????*/
 ???public static String uploadFileToDir(MultipartFile multipartFile, String saveDir) throws AobpException {
 ???????String fileName = UUID.randomUUID().toString().replaceAll("-", "");
 ???????// 文件新路径：文件名
 ???????uploadFileToDir(multipartFile, saveDir, fileName);
 ???????return fileName;
 ???}

 ???public static void uploadFileToDir(MultipartFile multipartFile, String saveDir, String fileName) throws AobpException {
 ???????uploadFile(multipartFile, saveDir + File.separator + fileName);
 ???}

 ???public static void uploadFile(MultipartFile multipartFile, String filePath) throws AobpException {
 ???????try (InputStream inputStream = multipartFile.getInputStream();
 ????????????FileOutputStream outputStream = new FileOutputStream(filePath)) {
 ???????????IOUtils.copy(inputStream, outputStream);
 ???????} catch (Exception e) {
 ???????????log.error("copy file failed", e);
 ???????????throw new AobpException(ExceptionConstant.INTERNAL_ERR, ExceptionConstant.UNKNOWN_ERROR);
 ???????}
 ???}
 ???
 ???//用户上传相关Yao
 ???protected ?static Map<String, String> getFilePath(String path, String originName){
 ???????Date nowDate = new Date();
 ???????String fileFolder = path+File.separator+new SimpleDateFormat("yyyy").format(nowDate)+
 ???????????????????????????????????File.separator+new SimpleDateFormat("MM").format(nowDate);
 ???
 ???????File fileNew = new File(fileFolder);
 ???????if(!fileNew.exists()){
 ???????????fileNew.mkdirs();
 ???????}
 ???????String fileName = new SimpleDateFormat("yyyyMMddhhmmssSSSS").format(nowDate)+(int)((Math.random()*9+1)*100000)+"."+originName.substring(originName.lastIndexOf(".")+1);
 ???????String filePath = fileFolder+File.separator+fileName;
 ???????Map<String, String > resultMap = new HashMap();
 ???????resultMap.put("fileName",fileName);
 ???????resultMap.put("filePath",filePath);
 ???????return resultMap;
 ???}
 ???
 ???public static String ?upload(MultipartFile file, String saveDir) throws IOException, AobpException {
 ???????//如果文件内容不为空，则写入上传路径
 ???????if (!file.isEmpty()) {
 ???????????//上传原文件名
 ???????????String originName = file.getOriginalFilename();
 ???????????Map<String, String> resultMap = getFilePath(saveDir, originName);
 ???????????File filePath = new File(resultMap.get("filePath"));
 ???????????try(FileOutputStream fileOutputStream = new FileOutputStream(filePath)){
 ???????????????FileCopyUtils.copy(file.getInputStream(), fileOutputStream);
 ???????????}
 ???????????return resultMap.get("fileName");
 ???????}
 ???????throw new AobpException(500, "图片上传失败");
 ???}
}

图片上传与下载

原文地址：https://www.cnblogs.com/gavin-yao/p/10567248.html