Java

 /***
     * 上传图片到服务器 并压缩
     *
     * @param myFile  文件
     * @param request
     * @return
     */
    private Boolean UploadFile(MultipartFile myFile, int width, int height,     HttpServletRequest request) {
        Boolean sta = false;
        InputStream is = null;
        FileOutputStream fs = null;
        /** 临时文件夹*/
        String imgPath = "xyimages" + File.separator + "buttonImgTemp" + File.separator;
        String tempPath = ServletConstants.WEB_ROOT_OS_PATH + imgPath;
        System.out.println("old-path-" + tempPath);
        String name = myFile.getOriginalFilename();
        File oldFile = new File(tempPath);
        if (!oldFile.exists()) {
            oldFile.mkdirs();
        }
        /** 处理后文件夹*/
        String newImaPath = "xyimages" + File.separator + "buttonImg" + File.separator;
        String newPath = ServletConstants.WEB_ROOT_OS_PATH + newImaPath;
        System.out.println("new-path-" + newPath);
        File newFile = new File(newPath);
        if (!newFile.exists()) {
            newFile.mkdirs();
        }
        try {
            /** 先存取源文件*/
            is = myFile.getInputStream();
            fs = new FileOutputStream(tempPath + myFile.getOriginalFilename());
            //...
            if (myFile.getSize() > 0) {
                byte[] buffer = new byte[1024 * 1024];
                int bytesum = 0;
                int byteread = 0;
                while ((byteread = is.read(buffer)) != -1) {
                    bytesum += byteread;
                    fs.write(buffer, 0, byteread);
                    fs.flush();
                }
                fs.close();
                is.close();
            }
            /** 处理源文件 ，进行压缩再放置到新的文件夹*/
            String oldPath = tempPath + myFile.getOriginalFilename();
            String copyPath = newPath + myFile.getOriginalFilename();
            Boolean ys = zipWidthHeightImageFile(oldPath, copyPath, width,height, 1f);
            if (ys)
                sta = true;
            else
                sta = false;
        } catch (Exception ex) {
            ex.printStackTrace();
            sta = false;
        }
        return sta;
    } 

/***
     * 压缩制定大小图片
     *
     * @param oldPath  临时图片路径
     * @param copyPath 压缩图片保存路径
     * @param width    宽度
     * @param height   高度
     * @param quality  高清度
     * @return
     * @throws Exception
     */
    private Boolean zipWidthHeightImageFile(String oldPath, String copyPath, int width, int height,
                                            float quality) {
        Boolean sta = false;
        File oldFile = new File(oldPath);
        File newFile = new File(copyPath);
        if (oldFile == null) {
            return null;
        }
        String newImage = null;
        try {
            /** 对服务器上的临时文件进行处理 */
            Image srcFile = ImageIO.read(oldFile);
            int w = srcFile.getWidth(null);
            System.out.println(w);
            int h = srcFile.getHeight(null);
            System.out.println(h);

            /** 宽,高设定 */
            BufferedImage tag = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
            tag.getGraphics().drawImage(srcFile, 0, 0, width, height, null);
            //String filePrex = oldFile.substring(0, oldFile.indexOf('.'));
            /** 压缩后的文件名 */
            //newImage = filePrex + smallIcon+ oldFile.substring(filePrex.length());

            /** 压缩之后临时存放位置 */
            FileOutputStream out = new FileOutputStream(newFile);

            JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
            JPEGEncodeParam jep = JPEGCodec.getDefaultJPEGEncodeParam(tag);
            /** 压缩质量 */
            jep.setQuality(quality, true);
            encoder.encode(tag, jep);
            out.close();
            sta = true;
        } catch (Exception e) {
            e.printStackTrace();
            sta = false;
        }
        return sta;
    }