图片上传阿里云（对象存储OSS）

 ???<!-- 注意版本很重要 --><dependency> ???????????<groupId>com.aliyun.oss</groupId> ???????????<artifactId>aliyun-sdk-oss</artifactId> ???????????<version>2.2.3</version> ???????</dependency>

//oss上传图片 ???public void attrcompress() throws IOException { ???????????????????????String str=attachmentService.Upload(request, null, false);//false用来判断是否需要上传高清图片 ???????????????????????response.getWriter().write(str);//返回图片地址 ????????????????????}//上传的方法 ?public String Upload(HttpServletRequest request, String path, Boolean is_compress) { ???????????List<FileItem> files = ossService.analysis(request);//从页面拿到文件list集合 ???????????ObjectNode resultMessage = JsonUtils.createObjectNode();//声明最后返回结果的josn字符串. ???????????/** ????????????* 开始遍历request中的文件 ????????????*/ ???????????for (FileItem file : files) {//遍历文件集合 ???????????????if (file.getName() == null) { ???????????????????InputStream iss = null; ???????????????????continue; ???????????????} ???????????????String gid = DataUtils.getUUID(); ???????????????if (is_compress) {//压缩上传保存 ???????????????????Attachment attachment_compress = this.Img_compress(file, path, gid); ???????????????????if (attachment_compress == null) { ???????????????????????return "操作失败1"; ???????????????????} else { ???????????????????????resultMessage.set("compressAttr", JsonUtils.beanToJsonObject(attachment_compress)); ???????????????????????return resultMessage.toString(); ???????????????????} ???????????????} else if (is_compress == false) {//原图上传保存 ???????????????????Attachment attachment_source = this.Img_source(file, path, gid); ???????????????????if (attachment_source == null) { ???????????????????????return "操作失败2"; ???????????????????} else { ???????????????????????resultMessage.set("sourceAttr", JsonUtils.beanToJsonObject(attachment_source)); ???????????????????} ???????????????} else {//原图和压缩全部上传保存 ???????????????????Attachment attachment_compress = this.Img_compress(file, path, gid); ???????????????????Attachment attachment_source = this.Img_source(file, path, gid); ???????????????????if (attachment_compress == null && attachment_source == null) { ???????????????????????return "操作失败3"; ???????????????????} else { ???????????????????????resultMessage.set("sourceAttr", JsonUtils.beanToJsonObject(attachment_source)); ???????????????????????resultMessage.set("compressAttr", JsonUtils. ?????????????????????????????????????????beanToJsonObject(attachment_compress)); ???????????????????????return resultMessage.toString(); ???????????????????} ???????????????} ???????????} ???????????if (resultMessage.isNull()) { ???????????????return "操作失败4"; ???????????} else { ???????????????return resultMessage.toString(); ???????????} ???????} ??????????????????//获取请求参数 ???????public List<FileItem> analysis(HttpServletRequest request) { ???????????List<FileItem> list = new ArrayList<FileItem>(); ???????????try { ???????????????DiskFileItemFactory factory = new DiskFileItemFactory(); ???????????????ServletFileUpload upload = new ServletFileUpload(factory); ???????????????List<?> uploadFiles; ???????????????//uploadFiles获取请求参数为空，缘为springMvc已配读取，此处为二次读取，所以为空 ???????????????uploadFiles = upload.parseRequest(request); ???????????????Iterator<?> iterator = uploadFiles.iterator(); ???????????????while (iterator.hasNext()) { ???????????????????Object object = iterator.next(); ???????????????????if (object instanceof FileItem) { ???????????????????????list.add((FileItem) object); ???????????????????} ???????????????} ???????????} catch (FileUploadException fue) {// ???????????????log.error("文件上传请求数据解析失败", fue); ????????????????fue.printStackTrace(); ???????????} ???????????return list; ???????}//处理文件流 ????private Attachment Img_compress(FileItem file, String path, String gid) { ???????????String id = DataUtils.getUUID(); ???????????if (path == null) { ???????????????path = "/temp/" + id; ???????????} ???????????/** ????????????* 获取到图片格式 ????????????*/ ???????????String attrName = file.getName(); ???// 附件的名称 ???????????String attType = attrName.substring(attrName.lastIndexOf(".") + 1); ???????????/** ????????????* 获取到图片模块 ????????????*/ ???????????String moudelName = file.getFieldName(); // 获得附件的模块名称 ???????????/** ????????????* 定义压缩图的名称 ????????????*/ ???????????String compressAttName = moudelName + "_compress" + "." + attType;//定义缩略图的名称 ???????????/** ????????????* 开始压缩 ????????????*/ ???????????int width = 500; ???????????int heigth = 500; ???????????ByteArrayInputStream in = null; ???????????try (ByteArrayOutputStream out = new ByteArrayOutputStream(file.get().length)) { ???????????????Image img = ImageIO.read(file.getInputStream()); ???????????????if (img.getWidth(null) == -1) { ???????????????????return null; ???????????????} else { ???????????????????int newWidth; ???????????????????int newHeight; ???????????????????double rate1 = ((double) img.getWidth(null)) / (double) width ??????????????????????????????????????????+ 0.1; ???????????????????double rate2 = ((double) img.getHeight(null)) / (double) heigth ??????????????????????????????????????????+ 0.1; ???????????????????// 根据缩放比率大的进行缩放控制 ??????????????????????double rate = rate1 > rate2 ? rate1 : rate2; ???????????????????newWidth = (int) (((double) img.getWidth(null)) / rate); ?//将大于规定尺寸的图片缩小，将小于规定尺寸的图片放大 ???????????????????newHeight = (int) (((double) img.getHeight(null)) / rate); ???????????????????BufferedImage tag = new BufferedImage(newWidth, newHeight, ?????????????????????????????????????????????????????????BufferedImage.TYPE_INT_RGB); ???????????????????img.getScaledInstance(newWidth, newHeight, Image.SCALE_SMOOTH); ???????????????????tag.getGraphics().drawImage(img.getScaledInstance(newWidth, ?????????????????????????????????????????????????????????????????????newHeight, ?????????????????????????????????????????????????????????????????????Image.SCALE_SMOOTH), ???????????????????????????????????????????????0, ???????????????????????????????????????????????0, null); ???????????????????ImageWriter imgWrier; ?//创建压缩的图片，用来编码和写入图像的抽象超类。此类必须由在 Java Image I/O 框架的上下文中写出图像的类为其创建子类。 ????????????????????ImageWriteParam imgWriteParams; ???????????????????imgWrier = ImageIO.getImageWritersByFormatName("jpg").next(); ???????????????????imgWriteParams ???????????????????????????= new javax.imageio.plugins.jpeg.JPEGImageWriteParam( ???????????????????????????????????null); ???????????????????imgWriteParams.setCompressionMode(ImageWriteParam.MODE_EXPLICIT); ???????????????????imgWriteParams.setCompressionQuality(0.3f); ???????????????????imgWriteParams.setProgressiveMode(ImageWriteParam.MODE_DISABLED); ???????????????????ColorModel colorModel = ColorModel.getRGBdefault(); ???????????????????imgWriteParams.setDestinationType( ???????????????????????????new javax.imageio.ImageTypeSpecifier( ???????????????????????????????????colorModel, colorModel. ???????????????????????????????????????????createCompatibleSampleModel(100, 100))); ???????????????????imgWrier.reset(); ???????????????????imgWrier.setOutput(ImageIO.createImageOutputStream(out)); ???????????????????imgWrier.write(null, new IIOImage(tag, null, null), ??????????????????????????????????imgWriteParams); ???????????????????out.flush(); ???????????????????in = new ByteArrayInputStream(out.toByteArray()); ???????????????????// ???????out.close(); ?????????????????} ???????????} catch (IOException e) { ???????????????e.printStackTrace();// ???????????????log.warn("图片压缩出现问题", e); ???????????} ???????????//上传保存压缩图片 ???????????String url = ossService.uploadFile(path, in, compressAttName);//将附件保存到oss服务器（Url/文件/文件名） ???????????Attachment attr = new Attachment(); ???????????attr.setId(id); ???????????attr.setAtt_name(compressAttName); ???????????attr.setAtt_path(url); ???????????attr.setMoudel_name(moudelName); ???????????attr.setAtt_type(attType); ???????????attr.setUpload_time(DateUtils.getSystemDate()); ???????????attr.setDownload_count(0); ???????????attr.setGid(gid); ???????????attr.setIs_compress(1);// ???????????this.saveAttachmentDao(attr);// ???????????Boolean flag = this.contains(attr); ???????????if (attr!=null) { ???????????????return attr; ???????????}else{ ????????????????return null; ???????????} ??????????????????} ??????????//上传文件 ???????public String uploadFile(String uploadPath, InputStream input, String fileName) { ???????????String uploadPathName = processingPath(uploadPath) + DataUtils.getUUID(); ???????????ObjectMetadata metadata = new ObjectMetadata(); ???????????metadata.setContentDisposition("attachment;filename=" + fileName); ???????????getOssClient().putObject(bucketName, uploadPathName, input, metadata); ???????????return getHttpURLByFileKey(uploadPathName); ???????} ???????//实例化服务端对象（oss） ?????????public OSSClient getOssClient() { ???????????if (client == null) { ???????????????ClientConfiguration conf = new ClientConfiguration(); ???????????????conf.setConnectionTimeout(timeout); ???????????????conf.setMaxErrorRetry(3); ???????????????client = new OSSClient(endpoint, accessKeyId, accessKeySecret);//oss应用所需参数 ???????????} ???????????return client; ???????}