OSS上传文件到阿里云

@Controller
@RequestMapping("/ossfile")
public class OSSFileController {

    @Autowired
    private EventidService eventidService;

    //-----------------------------------------------------------------------------------------------

    private final static String OSS_PATH = "";

    /**
     * 阿里云ACCESS_ID
     */
    private static String ACCESS_ID = "";
    /**
     * 阿里云ACCESS_KEY
     */
    private  static String ACCESS_KEY = "";
    /**
     * 阿里云OSS_ENDPOINT  青岛Url
     */
    private static String OSS_ENDPOINT = "";

    /**
     * 阿里云BUCKET_NAME  OSS
     */
    private static String BUCKET_NAME = "";

    @RequestMapping("/uploadfile")
    public String uploadfile(@RequestParam("file") MultipartFile file,
                             @RequestParam("eventId") int eventId,
                             HttpSession session) throws FileNotFoundException {
        ErrorResult result = new ErrorResult();
        //先提前设置下oss的部分
        OSSClient client = new OSSClient(OSS_ENDPOINT, ACCESS_ID, ACCESS_KEY);
        OSSNewUtils.ensureBucket(client, BUCKET_NAME);
        OSSNewUtils.setBucketPublicReadable(client, BUCKET_NAME);

        String Objectkey = file.getOriginalFilename();

        String filename = file.getOriginalFilename();
        System.out.println("文件名字"+file.getName());

        //这里给提交过来的文件设置一个本地路径,
        // 然后提交过来的文件先存入该路径，
        // 然后再从该路径提交到阿里云服务器
        // 得到uploadFile的绝对路径
        String realPath = session.getServletContext().getRealPath("uploadFile");
        // 将文件放在这个路径下
        File filedir = new File(realPath,file.getOriginalFilename());
        // 创建uploadFile目录
        filedir.getParentFile().mkdir();

        /*这里要写提交的文件地址,也就是已经下载到本地的本地文件地址*/
        String uploadFilePath = filedir.toString();

        //创建本地文件夹后，先将文件存入本地文件夹
        try {
            // 将上传的文件写入到本地中
            file.transferTo(filedir);
            session.setAttribute("imgPath", file.getOriginalFilename());
            System.out.println("文件上传到本地文件夹完成，本地文件夹地址:"+ filedir.toString()/*uploadFilePath*/);
        } catch (Exception e) {
            e.printStackTrace();
            System.err.println("文件上传到本地文件夹失败\n");
            session.setAttribute("errMsg", e.toString());
        }

        System.out.println("开始上传到阿里云服务器.");

        System.out.println("正在上传...");
        OSSNewUtils.uploadFile(client, BUCKET_NAME, Objectkey, uploadFilePath);

        System.out.println("上传文件到阿里云成功");

        //从阿里云服务器下载文件的存储地址
        //String downloadFilePath = "C:\\ccc\\";
        //System.out.println("正在下载...");
        //downloadFile(client, BUCKET_NAME, Objectkey, downloadFilePath);

        //发送文件请求，也需要携带你的eventid事件的id，才能存取地址到相应的eventid中去
        Eventid eventid = new Eventid();
        eventid = eventidService.selectByPrimaryKey(eventId);
        //设置数据库地址
        eventid.setEventMediafile(OSS_PATH+"/"+Objectkey);
        //将阿里云上的地址保存到数据库中去
        int resul =  eventidService.updateByPrimaryKey(eventid);
        System.out.println("更新数据库文件地址字段成功!");

        result.setStatus(200);
        result.setError("成功的上传文件到阿里云");
        result.setData(file);
        return "uploadsuccess";
    }



}

public class OSSNewUtils {

    /**
     * 创建Bucket
     *
     * @param client  OSSClient对象
     * @param bucketName  BUCKET名
     * @throws OSSException
     * @throws ClientException
     */
    public static void ensureBucket(OSSClient client, String bucketName)throws OSSException, ClientException {
        try{
            client.createBucket(bucketName);
        }catch(ServiceException e){
            if(!OSSErrorCode.BUCKET_ALREADY_EXISTS.equals(e.getErrorCode())){
                throw e;
            }
        }
    }

    /**
     * 删除一个Bucket和其中的Objects
     *
     * @param client  OSSClient对象
     * @param bucketName  Bucket名
     * @throws OSSException
     * @throws ClientException
     */
    public static void deleteBucket(OSSClient client, String bucketName)throws OSSException, ClientException{
        ObjectListing ObjectListing = client.listObjects(bucketName);
        List<OSSObjectSummary> listDeletes = ObjectListing.getObjectSummaries();
        for(int i = 0; i < listDeletes.size(); i++){
            String objectName = listDeletes.get(i).getKey();
            System.out.println("objectName = " + objectName);
            //如果不为空，先删除bucket下的文件
            client.deleteObject(bucketName, objectName);
        }
        client.deleteBucket(bucketName);
    }

    /**
     * 把Bucket设置成所有人可读
     *
     * @param client  OSSClient对象
     * @param bucketName  Bucket名
     * @throws OSSException
     * @throws ClientException
     */
    public static void setBucketPublicReadable(OSSClient client, String bucketName)throws OSSException, ClientException{
        //创建bucket
        client.createBucket(bucketName);

        //设置bucket的访问权限， public-read-write权限
        client.setBucketAcl(bucketName, CannedAccessControlList.PublicRead);
    }

    /**
     * 上传文件
     *
     * @param client  OSSClient对象
     * @param bucketName  Bucket名
     * @param Objectkey  上传到OSS起的名
     * @param filename  本地文件名
     * @throws OSSException
     * @throws ClientException
     * @throws FileNotFoundException
     */
    public static RespInfo uploadFile(OSSClient client, String bucketName, String Objectkey, String filename)
            throws OSSException, ClientException, FileNotFoundException {
        RespInfo respInfo = new RespInfo();
        File file = new File(filename);
        ObjectMetadata objectMeta = new ObjectMetadata();
        objectMeta.setContentLength(file.length());
        //判断上传类型，多的可根据自己需求来判定
        if (filename.endsWith("xml")) {
            objectMeta.setContentType("text/xml");
        }
        else if (filename.endsWith("jpg")) {
            objectMeta.setContentType("image/jpeg");
        }
        else if (filename.endsWith("png")) {
            objectMeta.setContentType("image/png");
        }

        InputStream input = new FileInputStream(file);
        client.putObject(bucketName, Objectkey, input, objectMeta);
        respInfo.setContent(filename);
        return respInfo;
    }

    /**
     *  下载文件
     *
     * @param client  OSSClient对象
     * @param bucketName  Bucket名
     * @param Objectkey  上传到OSS起的名
     * @param filename 文件下载到本地保存的路径
     * @throws OSSException
     * @throws ClientException
     */
    public static void downloadFile(OSSClient client, String bucketName, String Objectkey, String filename)
            throws OSSException, ClientException {
        client.getObject(new GetObjectRequest(bucketName, Objectkey),
                new File(filename));
    }
}