关于阿里云OSS上传以及下载的处理方法

来源：互联网发布：稳定的排序算法编辑：程序博客网时间：2024/05/22 00:47

正好这个项目快结束了 ，被阿里云下载折腾了好久，网上相关支持又比较少，所有我结合自己的项目，简单的讲一下。1.OSSObjectUtils基于OSS官方文档写的工具类

public class OSSObjectUtils {    private static Logger logger = LoggerFactory.getLogger(OSSObjectUtils.class);    private static OSSClient ossClient = new OSSClient(OSSConfig.ENDPOINT_SHANGHAI, OSSConfig.ACCESSKEY_ID, OSSConfig.ACCESSKEY_SECRET);    //private static OSSClient ossClient = new OSSClient("http://oss-cn-shanghai.aliyuncs.com", "0aHuVNGwxXsHDRIg", "6dvOMka7ON0DogefcWm09MbR4ofymB");    private static String ENDPOINTINFO = ossClient.getEndpoint().toString();    private OSSObjectUtils() {    }    /**     * 创建Bucket     *      * @param bucketName     * @throws OSSException     * @throws ClientException     */    @SuppressWarnings("unused")    @Deprecated    private static void createBucket(String bucketName) throws OSSException, ClientException {        if (!ossClient.doesBucketExist(bucketName)) {            logger.info(ENDPOINTINFO + "创建bucketName：" + bucketName);            ossClient.createBucket(bucketName);        }    }    public static boolean isExistObject(String bucketName, String key) {        boolean result = false;        try {            result = ossClient.doesObjectExist(bucketName, key);        } catch (Exception e) {            e.printStackTrace();        }        return result;    }    /**     * 上传object     *      * @param bucketName     * @param key     * @param inputStream     * @throws OSSException     * @throws ClientException     */    public static void putObject(String bucketName, String key, InputStream inputStream)            throws OSSException, ClientException {        logger.info(ENDPOINTINFO + "上传Object,bucketName=" + bucketName + ",key=" + key);        ossClient.putObject(bucketName, key, inputStream);    }    /**     * 上传object     *      * @param bucketName     * @param key     * @param inputStream     * @throws OSSException     * @throws ClientException     */    public static void putObject(String bucketName, String key, File file) throws OSSException, ClientException {        logger.info(ENDPOINTINFO + "上传Object,bucketName=" + bucketName + ",key=" + key);        ossClient.putObject(bucketName, key, file);    }    /**     * 上传object，带元数据     *      * @param bucketName     * @param key     * @param inputStream     * @param meta     * @throws OSSException     * @throws ClientException     */    public static void putObject(String bucketName, String key, InputStream inputStream, ObjectMetadata meta)            throws OSSException, ClientException {        logger.info(ENDPOINTINFO + "上传Object,bucketName=" + bucketName + ",key=" + key);        ossClient.putObject(bucketName, key, inputStream, meta);    }    /**     * 上传object，带进度listener     *      * @param bucketName     * @param key     * @param inputStream     * @param listener     * @throws Exception     */    public static void putObject(String bucketName, String key, InputStream inputStream,            PutObjectProgressListener listener) throws Exception {        logger.info(ENDPOINTINFO + "上传Object,带进度监听,bucketName=" + bucketName + ",key=" + key);        ossClient.putObject(                new PutObjectRequest(bucketName, key, inputStream).<PutObjectRequest> withProgressListener(listener));    }    /**     * 签名url     *     * @author kira     * @param bucketName     * @param key     * @param expiration     *            有效期     * @return     */    public static URL generatePresignedUrl(String bucketName, String key, Date expiration) {        logger.info(ENDPOINTINFO + "获取URL,bucketName=" + bucketName + ",key=" + key);        return ossClient.generatePresignedUrl(bucketName, key, expiration);    }    /**     * 获取object,并读取流输出至OutputStream<br>     * 用于流式下载     *     * @author kira     * @param bucketName     * @param key     * @param out     * @throws IOException     */    public static void getObjectToOutputStream(String bucketName, String key, OutputStream out) throws IOException {        logger.info(ENDPOINTINFO + "获取Object,输出至OutputStream,bucketName=" + bucketName + ",key=" + key);        byte[] buf = new byte[1024];        InputStream in = ossClient.getObject(bucketName, key).getObjectContent();        int length = 0;        while ((length = in.read(buf)) > 0) {            out.write(buf, 0, length);        }        in.close();        out.close();    }    /**     * 获取Object的Byte<br>     * 由于读取整个object至内存，故大文件不建议使用此方法，容易内存溢出     *      * @author kira     * @param bucketName     * @param key     * @return     * @throws IOException     */    public static byte[] getObjectByte(String bucketName, String key) throws IOException {        logger.info(ENDPOINTINFO + "获取Object的Byte,bucketName=" + bucketName + ",key=" + key);        byte[] buf = new byte[1024];        InputStream in = ossClient.getObject(bucketName, key).getObjectContent();        for (int n = 0; n != -1;) {            n = in.read(buf, 0, buf.length);        }        in.close();        return buf;    }    public static void main(String[] args){        /*List<Bucket> list= ossClient.listBuckets();        for(Bucket b:list){            System.out.println(b.getName());        }*/        //file/policyfile/236e7e90-0d9c-4fa7-b7f3-ffededb3f8d8.png        List<OSSObjectSummary> list=ossClient.listObjects("xsjyappstatic","file/policyfile/").getObjectSummaries();        for(OSSObjectSummary ossos:list){            System.out.println("##############################");            System.out.println(ossos.getKey());            //ossClient.deleteObject("jyjyimage", ossos.getKey());        }        //System.out.println(DateUtils.sdf_yMdHmsS.format(new Date()));        //System.out.println(ossClient.doesObjectExist("jyjyimage", "schoolbase-video/20170408134128185_WI4QUI105.mps4"));    }}

工具类准备好后我们着手写自己上传controller,基于项目代码，我们简单的看一下。
为了精简删除了一下与上传无关的代码
2.上传controller

@ResponseBody    @RequestMapping("/upload")    public String Upload(HttpServletRequest request,            @RequestParam("uploadfile") MultipartFile uploadfile,            @RequestParam("comm") String comm,            @RequestParam("csrftoken") String csrftoken){    String csrftoken_serssion = (String)request.getSession().getAttribute(com.unisolution.xsjy.jyj.helpers.SessionKeys.CSRFTOKEN);        Users sessionuser = SessionHelperForLogin.getSessionUser(request.getSession());        Map<String, Object> returnmap = new HashMap<String, Object>();        returnmap.put("status", "0");        returnmap.put("msg", "文件上传失败");        if(dgradeTypes!=null&&dgradeTypes.length>0 && uploadfile!=null && StringUtils.equals(csrftoken_serssion, csrftoken)){            String key=OSSConfig.OBJECTKEY_PREFIX_FILE_POLICYFILE+UUID.randomUUID().toString()+"."+StringUtils.substringAfterLast(uploadfile.getOriginalFilename(), ".");            try {                //application/octet-stream                //ObjectMetadata meta=new ObjectMetadata();                //meta.setContentType("application/octet-stream");                OSSObjectUtils.putObject(OSSConfig.BUCKETNAME_XSJY_STATICSERVER, key, uploadfile.getInputStream());                PolicyFile policyFile=new PolicyFile();                policyFile.setFileNameOriginal(uploadfile.getOriginalFilename());                /*                 *  FILE_SIZE                     FILE_PATH //阿里云地址                    FILE_PATH_CUSTOMDOMAIN //域名地址                    FILE_PATH_RELATIVE//域名后缀的详细地址                    www.ys.com/xsjy(bucketName)/file(key前缀)/asd51d1a.doc（uuid命名的）                 */                String file_path =OSSConfig.ENDPOINT_SHANGHAI+"/"+OSSConfig.BUCKETNAME_XSJY_STATICSERVER+"/"+key;                String file_path_customdomain =OSSConfig.CUSTOMDOMAIN_XSJY_STATICSERVER+"/"+key;                String file_path_relative="/"+OSSConfig.BUCKETNAME_XSJY_STATICSERVER+"/"+key;                policyFile.setFilePath(file_path);                policyFile.setFilePathCustomdomain(file_path_customdomain);                policyFile.setFilePathRelative(file_path_relative);                policyFile.setOssbucket(OSSConfig.BUCKETNAME_XSJY_STATICSERVER);                policyFile.setOssobjectkey(key);                //policyFile.setFileSize();                if(policyFileService.save(policyFile)){                    returnmap.put("status", "1");                    returnmap.put("msg", "文件上传成功");                }            } catch (OSSException e) {                logger.error(e.getMessage());                e.printStackTrace();            } catch (ClientException e) {                logger.error(e.getMessage());                e.printStackTrace();            } catch (IOException e) {                logger.error(e.getMessage());                e.printStackTrace();            }        }else{            returnmap.put("msg", "非法访问");        }        System.out.println(JSONObject.toJSONString(returnmap));        return JSONObject.toJSONString(returnmap);    }上面代码最主要是OSSObjectUtils.putObject(OSSConfig.BUCKETNAME_XSJY_STATICSERVER, key, uploadfile.getInputStream());OSSConfig.BUCKETNAME_XSJY_STATICSERVER：项目的静态服务器BUCKETNAMEOSSConfig.OBJECTKEY_PREFIX_FILE_POLICYFILE：key的前缀，BUCKETNAME后的文件夹key：包含两个部分，前缀+文件名，文件名我才用的是UUID，避免出现同名问题。下载时通过之前保存的设置下载文件名OSSObjectUtils.putObject（）再传入流之后，上传就完成了。但是为了保存一些属性方便以后下载使用。FILE_PATH //阿里云地址FILE_PATH_CUSTOMDOMAIN //域名地址我选择一个测试文件来说明一下。1）**FILE_PATH** ：http://oss-cn-shanghai.aliyuncs.com/xsjyappstatic/file/policyfile/7ffd4732-5c54-45e6-b2d4-6553b3f5ccd1.jpg2）**FILE_PATH_CUSTOMDOMAIN** ：http://static01.xsjyapp.com/file/policyfile/7ffd4732-5c54-45e6-b2d4-6553b3f5ccd1.jpg这两个地址都能访问到，只是阿里云地址会被一些DNS屏蔽。所以我们一般采用第二个，其实仔细可以发现。http://oss-cn-shanghai.aliyuncs.com/xsjyappstatic==http://static01.xsjyapp.com这之间是有映射关系的。3）**FILE_PATH_RELATIVE**：这个属性存储的是域名后的详细路径也就是两个地址相同的部分，如果以后更换项目域名，你会发现好处的。再说下载

@RequestMapping(“/download”)//下载为html
public void download(HttpServletRequest request, HttpServletResponse response,
@RequestParam(“id”) Long id,
@RequestParam(“csrftoken”) String csrftoken) {

        String csrftoken_serssion = (String) request.getSession().getAttribute(com.unisolution.xsjy.jyj.helpers.SessionKeys.CSRFTOKEN);        if(id!=null&&StringUtils.equals(csrftoken_serssion, csrftoken)){            PolicyFile policyFile=policyFileService.getByPrimaryKey(id);            if(policyFile!=null){                String extname=StringUtils.substringAfterLast(policyFile.getFileNameOriginal(), ".");                String encode_filename=StringUtils.substringBeforeLast(policyFile.getFileNameOriginal(), ".");                try {                    //encode_filename=URLEncoder.encode(StringUtils.substringBeforeLast(policyFile.getFileNameOriginal(), "."), "UTF-8");                    //encode_filename=new String(StringUtils.substringBeforeLast(policyFile.getFileNameOriginal(), ".").getBytes(),"UTF-8");                    encode_filename=encode_filename.replace(" ", "");                    encode_filename = new String(encode_filename.getBytes("GB2312"), "ISO8859-1");                } catch (Exception e) {                    e.printStackTrace();                    logger.error(e.getMessage());                    encode_filename=String.valueOf(new Date().getTime());                }                response.reset();                //1.设置文件ContentType类型，这样设置，会自动判断下载文件类型                  response.setContentType("application/octet-stream; charset=utf-8");                  //2.设置文件头：最后一个参数是设置下载文件名(假如我们叫a.pdf)                  response.setHeader("Content-Disposition", "attachment; filename="+encode_filename+"."+extname);                  OutputStream out=null;                try {                    out=response.getOutputStream();                    OSSObjectUtils.getObjectToOutputStream(policyFile.getOssbucket(), policyFile.getOssobjectkey(), out);                } catch (IOException e) {                    logger.error(e.getMessage());                    e.printStackTrace();                }finally{                    try {                        out.close();                    } catch (IOException e) {                        logger.error(e.getMessage());                        e.printStackTrace();                    }                }            }        }}

encode_filename写了好几次主要是火狐的不兼容，没有办法解析转过的文件名，以及文件名出现空格所出现的文件名不完整。为了这个搞了好久，看见火狐就头疼。catch中的文件名是为了防止程序出错按照日期来设置默认文件名。response.setHeader（）是设置消息头filename后面的按照你的需要来，其他的按照这样写就写，为什么我也不知道，规范。

OutputStreamout=response.getOutputStream();
OSSObjectUtils.getObjectToOutputStream(policyFile.getOssbucket(), policyFile.getOssobjectkey(), out);
“`
这里面其实是要try catch的为了简洁。。。。

通过rep获取输出流对象，然后就是OSSObjectUtils.getObjectToOutputStream（）；
第一个参数是bucketname 就是项目域名后存放的文件夹名
第二次参数是key 就是设置路径+整个文件名。
第三个就是传入输出流

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