阿里云图片压缩上传代码

1.页面端

<form action="mem/upload" method="post" enctype="multipart/form-data" onsubmit="return checkForm(this);">
                <input type="hidden" name="flag" value="3"/><input type="hidden" name="memNo" value="${mem.memNo}"/><input type="hidden" name="authSt" value="${mem.idCardAuth}"/>
                <c:if test="${mem.idCardAuth==0}"><input type="file" name="authFile"/><input type="submit" value="上传"/></c:if>
                <c:if test="${mem.idCardAuth!=0}"><input type="file" name="authFile"/><input type="submit" value="重新上传"/></c:if> 
                </form>

2.控制器

@RequestMapping(value="upload",method=RequestMethod.POST)
    public String upload(DefaultMultipartHttpServletRequest multipartRequest,@RequestParam int memNo, @RequestParam int flag,@RequestParam int authSt, HttpServletResponse response){
        if (multipartRequest != null) {  
            memberService.uploadMemPic(multipartRequest,memNo, flag,authSt);
        }  
        //uploadService.json_encode(response, list);  
        //return "redirect:/pic/upload/"+carNo;
        return "redirect:/mem/detail/"+memNo;
    }

3.Service层方法

/**
     * 
     * @param multipartRequest
     * @param memNo
     * @param picKey
     * @param flag 1：：本人照片，3：身份证正面照，4:身份证背面，5：驾照照片
     * @param authSt 0：未上传
     */
    public void uploadMemPic(DefaultMultipartHttpServletRequest multipartRequest, int memNo, int flag, int authSt) {
        Map<String,Object> map = new HashMap<String,Object>();
        map.put("memNo", memNo);
        map.put("flag", flag);
        
        Map<String,Object> memPath = memberMapper.getMemBasePath(map);
        String basePath = (String)memPath.get("basePath");
        String oldPicKey = (String)memPath.get("picKey");
        if(authSt != 0 && StringUtils.hasText(oldPicKey)){
            OSSUtils.deleteOSSObjectAuth(oldPicKey);//删除之前的图片
        }
        
        MultipartFile multifile = multipartRequest.getFile("authFile");
        String picName = multifile.getOriginalFilename();
        String extName = picName.substring(picName.lastIndexOf("."));
        String newPicName = FILE_NAME_MAPING.get(flag) + extName;
        
        String picKey = "mem/" + basePath + newPicName;
        map.put("picKey", picKey);
        memberMapper.updateAuth(map);//更新数据库表
        try {
            
//            OSSUtils.uploadInputStreamAuth(picKey, multifile);
            //压缩身份证和驾照图片， 140918 
            InputStream input = null;
            input = multifile.getInputStream();
            //Image image = ImageIO.read(input);
            BufferedImage  bufImg = ImageIO.read(input);//把图片读入到内存中

　　　　　　　　//压缩代码
　　　　　　　　bufImg = Thumbnails.of(bufImg).size(bufImg.getWidth(), bufImg.getHeight()).outputQuality(0.9).asBufferedImage();

            OSSUtils.uploadInputStreamAuth(picKey, bufImg);
            
        } catch (Exception e) {
            logger.error("",e);
        }
    }

4.OSSUtils工具类

public static boolean uploadInputStreamAuth(String key, BufferedImage image) throws Exception{
        boolean errorCode = false;
        ObjectMetadata objectMeta = new ObjectMetadata();
        objectMeta.setContentType("image/*");//在metadata中标记文件类型
        
//        InputStream input = multifile.getInputStream();
//        InputStream inputTmp = multifile.getInputStream();
        
        //--------------------
        //转成inputStream
        ByteArrayOutputStream bos = new ByteArrayOutputStream();//存储图片文件byte数组
        ImageOutputStream ios = ImageIO.createImageOutputStream(bos); 
        ImageIO.write(image, "jpg", ios); //图片写入到 ImageOutputStream
        
        InputStream input = new ByteArrayInputStream(bos.toByteArray());
        InputStream inputTmp = new ByteArrayInputStream(bos.toByteArray());
        //--------------------
        
        try {
            objectMeta.setContentLength(input.available());
            //校验文件MD5值
            PutObjectResult    res = client.putObject(BUCKET_AUTH, key, input, objectMeta);
            String checkMD5 = res.getETag();
            String verifyCode = getFileInputStreamMD5(inputTmp);
            if(verifyCode.equalsIgnoreCase(checkMD5) == true){
                logger.info("文件上传成功：{}",key);
                errorCode = true;
            }else{
                logger.error("文件上传失败：{}",key);
            }
        } catch (Exception e) {
            logger.error("",e);
        }finally{
            if(inputTmp != null){
                inputTmp.close();
            }
        }
        return errorCode;
    }