阿里云图片上传跳板服务器方式图片压缩裁减质量压缩

public class OSSClientUtil {Logger logger = LoggerFactory.getLogger(OSSClientUtil.class);// endpoint以杭州为例，其它region请按实际情况填写private String endpoint = ConstUtil.ENDPOINT;// accessKeyprivate String accessKeyId = ConstUtil.ACCESSKEYID;private String accessKeySecret = ConstUtil.ACCESSKEYSECRET;//空间private String bucketName = ConstUtil.BUCKETNAME;//文件存储目录private String filedir = ConstUtil.FILEDIR;private OSSClient ossClient;public OSSClientUtil() {ossClient = new OSSClient(endpoint, accessKeyId, accessKeySecret);}/*** 初始化*/public void init() {ossClient = new OSSClient(endpoint, accessKeyId, accessKeySecret);}/*** 销毁*/public void destory() {ossClient.shutdown();}/*** 上传图片*/public String uploadImg2Oss(MultipartFile file, Integer widthValue, Integer heightValue, int isCompress, String dirName, String dirkName, String ossImageDomain) {//获取文件名字String originalFilename = file.getOriginalFilename();//文件后缀格式String substring = originalFilename.substring(originalFilename.lastIndexOf(".")).toLowerCase();//根据时间给文件一个新的名字SimpleDateFormat dt = new SimpleDateFormat("yyyyMMddHH");//图片上级文件夹String path = dt.format(new Date());//图片名称SimpleDateFormat dh = new SimpleDateFormat("yyyyMMddHHmmss");String newname = dh.format(new Date());String newImgName = newname + "_"+ new Random().nextInt(1000) + substring;filedir = filedir + dirName + "/" + dirkName + "/" + path + "/";//图片存储路径try {//将文件流化再压缩InputStream inputStream = file.getInputStream();if (widthValue != null && heightValue != null && isCompress == 1) {Image bi = ImageIO.read(inputStream);//读取文件流写成图片//根据宽高压缩BufferedImage tag = new BufferedImage(widthValue, heightValue, BufferedImage.TYPE_INT_RGB);tag.getGraphics().drawImage(bi, 0, 0, widthValue, heightValue, null);//新建一个ByteArrayOutputStream把数据暂时保存在java内存中ByteArrayOutputStream os = new ByteArrayOutputStream();//写入ByteArrayOutputStream，substring.substring(1, substring.length())获取的是原文件后缀ImageIO.write(tag, substring.substring(1, substring.length()), os);//用文件流再次读取图片inputStream = new ByteArrayInputStream(os.toByteArray());}String urlname = this.ossUpload(inputStream, filedir + newImgName, ossImageDomain);return urlname;} catch (Exception e) {logger.error(e.getMessage(), e);return "error图片上传失败";}}/*** 获得图片路径** @param fileUrl* @return*/public String getImgUrl(String fileUrl) {if (!StringUtils.isEmpty(fileUrl)) {String[] split = fileUrl.split("/");return this.getUrl(this.filedir + split[split.length - 1]);}return null;}/*** 获得url链接** @param key* @return*/public String getUrl(String key) {// 设置URL过期时间为10年  3600l* 1000*24*365*10Date expiration = new Date(new Date().getTime() + 3600l * 1000 * 24 * 365 * 10);// 生成URLURL url = ossClient.generatePresignedUrl(bucketName, key, expiration);if (url != null) {return url.toString();}return null;}/*** @return* @throws IOException*/public String ossUpload(InputStream inputStream, String key, String ossImageDomain) throws IOException {ossClient.putObject(ConstUtil.BUCKETNAME, key, inputStream);return ossImageDomain + "/" + key;}/*** 返回上传到阿里云的地址** @param imgUrl* @return*/public String getOssSrc(String imgUrl, String imageBridge, String ossImageDomain) {try {String url = getDataSrc(imgUrl, imageBridge);//通过跳板下载，防止服务器被封杀InputStream inputStream = new URL(url).openStream();return getOssSrc(url, inputStream, ossImageDomain);} catch (Exception e) {logger.error(e.getMessage(), e);}return null;}public String getOssSrc(String url, InputStream inputStream, String ossImageDomain) {String fileExt = url.substring(url.lastIndexOf("."), url.length());//处理图片格式fileExt = fileExtString(fileExt);String key = EncryptUtils.md5(url);//无需扩展名，浏览器能正常加载<img/>String dPath = "";Calendar a = Calendar.getInstance();dPath += String.valueOf(a.get(Calendar.YEAR));dPath += "/";dPath += String.valueOf(a.get(Calendar.MONTH) + 1);dPath += "/";dPath += String.valueOf(a.get(Calendar.DAY_OF_MONTH));dPath += "/";String oospath = dPath.substring(0, dPath.length() - 1);String remoteFilePath = oospath.substring(0, oospath.length()).replaceAll("\\\\", "/") + "/";String path = filedir + remoteFilePath + key + fileExt;ossClient.putObject(ConstUtil.BUCKETNAME, path, inputStream);return ossImageDomain + "/" + path;}String fileExtString(String fileExt){if (fileExt.equalsIgnoreCase(".bmp")) {return ".bmp";}if (fileExt.equalsIgnoreCase(".gif")) {return ".gif";}if (fileExt.equalsIgnoreCase(".jpeg") ||fileExt.equalsIgnoreCase(".jpg") ||fileExt.equalsIgnoreCase(".png")) {return ".jpeg";}if (fileExt.equalsIgnoreCase(".html")) {return ".html";}if (fileExt.equalsIgnoreCase(".txt")) {return ".plain";}if (fileExt.equalsIgnoreCase(".vsd")) {return ".vnd.visio";}if (fileExt.equalsIgnoreCase(".pptx") ||fileExt.equalsIgnoreCase(".ppt")) {return ".vnd.ms-powerpoint";}if (fileExt.equalsIgnoreCase(".docx") ||fileExt.equalsIgnoreCase(".doc")) {return ".msword";}if (fileExt.equalsIgnoreCase(".xml")) {return ".xml";}if (fileExt.equalsIgnoreCase(".pdf")) {return ".pdf";}return ".jpeg";}/*** 返回被跳板服务器处理过的地址** @param imgUrl* @return*/public String getDataSrc(String imgUrl, String imageBridge) {if (imageBridge != null && !"".equals(imageBridge)) {if (imgUrl != null) {try {return imageBridge + URLEncoder.encode(imgUrl, "utf-8");} catch (UnsupportedEncodingException e) {logger.error(e.getMessage(), e);}}}return imgUrl;}/*** 上传图片*/public String uploadImg2OssImageShear(MultipartFile file, Integer imageHeightValue, Integer imageWidthValue, String dirName, String dirkName, String ossImageDomain) {//获取文件名字String originalFilename = file.getOriginalFilename();//文件后缀格式String substring = originalFilename.substring(originalFilename.lastIndexOf(".")).toLowerCase();//根据时间给文件一个新的名字SimpleDateFormat dt = new SimpleDateFormat("yyyyMMddHH");//图片上级文件夹String path = dt.format(new Date());//图片名称SimpleDateFormat dh = new SimpleDateFormat("yyyyMMddHHmmss");String newname = dh.format(new Date());String newImgName = newname + "_"+ new Random().nextInt(1000) + substring;filedir = filedir + dirName + "/" + dirkName + "/" + path + "/";//图片存储路径try {//将文件流化再压缩InputStream inputStream = file.getInputStream();Image bi = ImageIO.read(inputStream);//读取文件流写成图片int srcHeight = bi.getHeight(null); //原图片宽度int srcWidth = bi.getWidth(null);if(srcHeight<imageHeightValue){return "error图片高度："+srcHeight+"，小于标准："+imageHeightValue;}if(srcWidth<imageWidthValue){return "error图片宽度："+srcWidth+"，小于标准："+imageWidthValue;}inputStream = ImageUtil.PictureCompressionAndClipping(bi,imageHeightValue,imageWidthValue,substring.substring(1, substring.length()));String urlname = this.ossUpload(inputStream, filedir + newImgName, ossImageDomain);return urlname;} catch (Exception e) {logger.error(e.getMessage(), e);return "error图片上传失败";}}}

/*** Created by xuzhen on 4/8/19.*/
public class ImageUtil {/*** 压缩和剪切** @param bi      图片* @param imageHeightValue 压缩高度* @param imageWidthValue  压缩宽度* @param format           文件格式* @return*/public static InputStream PictureCompressionAndClipping(Image bi, Integer imageHeightValue, Integer imageWidthValue, String format) throws IOException {int srcHeight = bi.getHeight(null); //原图片宽度int srcWidth = bi.getWidth(null);ByteArrayOutputStream os = new ByteArrayOutputStream();BufferedImage tag = null;if (srcWidth > srcHeight) {tag = PictureCompressionAndClippingHeight(bi, imageHeightValue, imageWidthValue);} else {tag = PictureCompressionAndClippingWidth(bi, imageHeightValue, imageWidthValue);}ImageIO.write(tag, format, os);//用文件流再次读取图片InputStream inputStream = new ByteArrayInputStream(os.toByteArray());return inputStream;}/*** 裁剪图片方法** @param bufferedImage 图像源* @param startX        裁剪开始x坐标* @param startY        裁剪开始y坐标* @param endX          裁剪结束x坐标* @param endY          裁剪结束y坐标* @return*/public static BufferedImage cropImage(BufferedImage bufferedImage, int startX, int startY, int endX, int endY) {int width = bufferedImage.getWidth();int height = bufferedImage.getHeight();if (startX == -1) {startX = 0;}if (startY == -1) {startY = 0;}if (endX == -1) {endX = width - 1;}if (endY == -1) {endY = height - 1;}BufferedImage result = new BufferedImage(endX - startX, endY - startY, 4);for (int x = startX; x < endX; ++x) {for (int y = startY; y < endY; ++y) {int rgb = bufferedImage.getRGB(x, y);result.setRGB(x - startX, y - startY, rgb);}}return result;}/*** 根据宽度缩放** @param bi* @param imageHeightValue* @param imageWidthValue* @return*/public static BufferedImage PictureCompressionAndClippingWidth(Image bi, Integer imageHeightValue, Integer imageWidthValue) {int srcHeight = bi.getHeight(null);int srcWidth = bi.getWidth(null);BufferedImage tag = null;if (srcWidth > imageWidthValue) {double jishu = (double) srcWidth / (double) imageWidthValue;double heightValue = bi.getHeight(null);heightValue = heightValue / jishu;if (heightValue < imageHeightValue) {return PictureCompressionAndClippingHeight(bi, imageHeightValue, imageWidthValue);}Double heightValuedouble = new Double(heightValue);int heightValueInt = heightValuedouble.intValue();tag = new BufferedImage(Integer.valueOf(imageWidthValue), heightValueInt, BufferedImage.TYPE_INT_RGB);tag.getGraphics().drawImage(bi.getScaledInstance(Integer.valueOf(imageWidthValue), heightValueInt, Image.SCALE_SMOOTH), 0, 0, null);if (heightValue > imageHeightValue) {tag = cropImage(tag, 0, (heightValueInt - imageHeightValue) / 2, imageWidthValue, heightValueInt - ((heightValueInt - imageHeightValue) / 2));}} else {tag = new BufferedImage(srcWidth, srcHeight, BufferedImage.TYPE_INT_RGB);tag.getGraphics().drawImage(bi.getScaledInstance(srcWidth, srcHeight, Image.SCALE_SMOOTH), 0, 0, null);if (srcHeight > imageHeightValue) {tag = cropImage(tag, 0, (srcHeight - imageHeightValue) / 2, srcWidth, srcHeight - ((srcHeight - imageHeightValue) / 2));}}return tag;}/*** 根据高度缩放** @param bi* @param imageHeightValue* @param imageWidthValue* @return*/public static BufferedImage PictureCompressionAndClippingHeight(Image bi, Integer imageHeightValue, Integer imageWidthValue) {int srcHeight = bi.getHeight(null);int srcWidth = bi.getWidth(null);BufferedImage tag = null;if (srcHeight > imageHeightValue) {double jishu = (double) srcHeight / (double) imageHeightValue;double widthValue = bi.getWidth(null);widthValue = widthValue / jishu;if (widthValue < imageWidthValue) {return PictureCompressionAndClippingWidth(bi, imageHeightValue, imageWidthValue);}Double widthValuedouble = new Double(widthValue);int widthValueInt = widthValuedouble.intValue();tag = new BufferedImage(Integer.valueOf(widthValueInt), imageHeightValue, BufferedImage.TYPE_INT_RGB);tag.getGraphics().drawImage(bi.getScaledInstance(Integer.valueOf(widthValueInt), imageHeightValue, Image.SCALE_SMOOTH), 0, 0, null);if (widthValue > imageWidthValue) {tag = cropImage(tag, (widthValueInt - imageWidthValue) / 2, 0, widthValueInt - ((widthValueInt - imageWidthValue) / 2), imageHeightValue);}} else {tag = new BufferedImage(srcWidth, srcHeight, BufferedImage.TYPE_INT_RGB);tag.getGraphics().drawImage(bi.getScaledInstance(srcWidth, srcHeight, Image.SCALE_SMOOTH), 0, 0, null);if (srcWidth > imageWidthValue) {tag = cropImage(tag, (srcWidth - imageWidthValue) / 2, 0, srcWidth - ((srcWidth - imageWidthValue) / 2), srcHeight);}}return tag;}public static InputStream MassCompression(InputStream inputStream, Image bi, Integer RegulationsWidth, Integer RegulationsHeight) {try {ByteArrayOutputStream outputStream = new ByteArrayOutputStream();//原图片宽高Integer width = bi.getWidth(null);Integer height = bi.getHeight(null);//宽度比例//Double widthBi = width.doubleValue() / RegulationsWidth.doubleValue();//高度比例//Double heightBi = height.doubleValue() / RegulationsHeight.doubleValue();//原图宽高比例Double oldImageBi = width.doubleValue() / height.doubleValue();//需求图片宽高比例Double newImageBi = RegulationsWidth.doubleValue() / RegulationsHeight.doubleValue();if (oldImageBi > newImageBi) {//宽度比高度比例要大，证明是宽图  裁减宽度 再压缩Thumbnails.of(inputStream).sourceRegion(Positions.CENTER, (int) (height * newImageBi), height) //裁减.scale(RegulationsHeight.doubleValue() / height.doubleValue()).outputQuality(0.8f) //质量压缩80%.toOutputStream(outputStream);} else {Thumbnails.of(inputStream).sourceRegion(Positions.CENTER, width, (int) (width / newImageBi)) //裁减.scale(RegulationsWidth.doubleValue() / width.doubleValue()).outputQuality(0.8f) //质量压缩80%.toOutputStream(outputStream);}ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(outputStream.toByteArray());return byteArrayInputStream;} catch (IOException e) {logger.error(e.getMessage(), e);}return null;}public static InputStream outputQuality(InputStream inputStream, Image bi) {try {ByteArrayOutputStream outputStream = new ByteArrayOutputStream();Thumbnails.of(inputStream).size(bi.getWidth(null), bi.getHeight(null)).outputQuality(0.5f) //质量压缩80%.toOutputStream(outputStream);ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(outputStream.toByteArray());return byteArrayInputStream;} catch (IOException e) {logger.error(e.getMessage(), e);}return null;}
}

     <dependency><groupId>com.aliyun.oss</groupId><artifactId>aliyun-sdk-oss</artifactId><version>2.3.0</version></dependency><dependency><groupId>net.coobird</groupId><artifactId>thumbnailator</artifactId><version>0.4.8</version></dependency>```

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