阿里文件上傳

工具類：OSSClientUtil

public class OSSClientUtil {

    private String endpoint = "http://oss-cn-hangzhou.aliyuncs.com/";
    // accessKey
    private String accessKeyId = "LTAI4FWE********";
    //accessKeySecret
    private String accessKeySecret = "0vnAVGXpPZFOr3****************";
    // Bucket名稱
    private String bucketName = "bucketName";
    // 文件存儲目錄
    private String filedir = "";

    private OSSClient ossClient;

    public OSSClientUtil() {
        //注意： 專有云、專有域環境必須要使用ClientConfiguration的對象傳入參數，不然會報錯。
        // 創建ClientConfiguration實例，按照您的需要修改默認參數。
        ClientConfiguration conf = new ClientConfiguration();
        // 關閉CNAME選項。
        conf.setSupportCname(false);
        ossClient = new OSSClient(endpoint, accessKeyId, accessKeySecret,conf);
    }

    /**
    * 初始化
    */
    public void init() {
        ossClient = new OSSClient(endpoint, accessKeyId, accessKeySecret);
    }

    /**
    * 銷燬
    */
    public void destory() {
        ossClient.shutdown();
    }

    /**
    * 上傳圖片
    *
    * @param url
    */
    public void uploadImg2Oss(String url) throws Exception {
        File fileOnServer = new File(url);
        FileInputStream fin;
        try {
            fin = new FileInputStream(fileOnServer);
            String[] split = url.split("/");
            this.uploadFile2OSS(fin, split[split.length - 1]);
        } catch (FileNotFoundException e) {
            throw new Exception("圖片上傳失敗");
        }
    }

    public String uploadImg2Oss(MultipartFile file) throws Exception {
        if (file.getSize() > 2 * 1024 * 1024) {
            throw new Exception("上傳圖片大小不能超過2M！");
        }
        String originalFilename = file.getOriginalFilename();
        System.out.println(originalFilename);
        String substring = originalFilename.substring(originalFilename.lastIndexOf(".")).toLowerCase();
        Random random = new Random();
        String name = random.nextInt(10000) + System.currentTimeMillis() + substring;
        try {
            InputStream inputStream = file.getInputStream();
            //System.out.println("文件名稱="+name);
            this.uploadFile2OSS(inputStream, name);
            return name;
        } catch (Exception e) {
            throw new Exception("圖片上傳失敗");
        }
    }

    /**
    * 上傳到OSS服務器 如果同名文件會覆蓋服務器上的
    * @param instream 文件流
    * @param fileName 文件名稱 包括後綴名
    * @return 出錯返回"" ,唯一MD5數字簽名
    */
    public String uploadFile2OSS(InputStream instream, String fileName) {
        String ret = "";
        try {
            // 創建上傳Object的Metadata
            ObjectMetadata objectMetadata = new ObjectMetadata();
            objectMetadata.setContentLength(instream.available());
            objectMetadata.setCacheControl("no-cache");
            objectMetadata.setHeader("Pragma", "no-cache");
            objectMetadata.setContentType(getcontentType(fileName.substring(fileName.lastIndexOf("."))));
            objectMetadata.setContentDisposition("inline;filename=" + fileName);
            //System.out.println("開始上傳文件");
            // 上傳文件
            PutObjectResult putResult = ossClient.putObject(bucketName, fileName, instream, objectMetadata);
            //PutObjectResult putResult = ossClient.putObject(bucketName,  fileName, instream, objectMetadata);
            //System.out.println("上傳成功");
            ret = putResult.getETag();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                if (instream != null) {
                    instream.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return ret;
    }
    /**
    * Description: 判斷OSS服務文件上傳時文件的contentType 
    *
    * @param filenameExtension 文件後綴
    * @return String
    */
    public static String getcontentType(String filenameExtension) {
        if (filenameExtension.equalsIgnoreCase("bmp")) {
            return "image/bmp";
        }
        if (filenameExtension.equalsIgnoreCase("gif")) {
            return "image/gif";
        }
        if (filenameExtension.equalsIgnoreCase("jpeg") || filenameExtension.equalsIgnoreCase("jpg")
        || filenameExtension.equalsIgnoreCase("png")) {
            return "image/jpeg";
        }
        if (filenameExtension.equalsIgnoreCase("html")) {
            return "text/html";
        }
        if (filenameExtension.equalsIgnoreCase("txt")) {
            return "text/plain";
        }
        if (filenameExtension.equalsIgnoreCase("vsd")) {
            return "application/vnd.visio";
        }
        if (filenameExtension.equalsIgnoreCase("pptx") || filenameExtension.equalsIgnoreCase("ppt")) {
            return "application/vnd.ms-powerpoint";
        }
        if (filenameExtension.equalsIgnoreCase("docx") || filenameExtension.equalsIgnoreCase("doc")) {
            return "application/msword";
        }
        if (filenameExtension.equalsIgnoreCase("xml")) {
            return "text/xml";
        }
        return "image/jpeg";
    }

    /**
    * 獲得url鏈接 
    *
    * @param key
    * @return
    */
    public String getUrl(String key) {
        // 設置URL過期時間爲10年 3600l* 1000*24*365*10  
        Date expiration = new Date(System.currentTimeMillis() + 3600L * 1000 * 24 * 365 * 10);
        // 生成URL  
        URL url = ossClient.generatePresignedUrl(bucketName, key, expiration);
        if (url != null) {
            System.out.println("url="+url.toString());
            return url.toString();
        }
        return null;
    }

    public boolean deleteFile(String filePath) {
        boolean exist = ossClient.doesObjectExist(bucketName, filePath);
        if (!exist) {
            System.out.println("文件不存在,filePath=" + filePath);
            return false;
        }
        System.out.println("刪除文件,filePath=" + filePath);
        ossClient.deleteObject(bucketName, filePath);
        // ossClient.shutdown();
        return true;
    }

    /**
     * 獲取流文件
     * @param response
     * @param request
     * @param fileId
     * @param fileName
     */
    public void getFile(HttpServletResponse response, HttpServletRequest request,String fileId,String fileName) {
        try {
            int i=fileName.lastIndexOf("\\");
            fileName=fileName.substring(i+1);
           //獲取fileid對應的阿里雲上的文件對象
            OSSObject ossObject = ossClient.getObject(bucketName, fileId);//bucketName需要自己設置
           // 讀去Object內容  返回
            BufferedInputStream in=new BufferedInputStream(ossObject.getObjectContent());
            BufferedOutputStream out=new BufferedOutputStream(response.getOutputStream());
           //通知瀏覽器以附件形式下載
            response.setHeader("Content-Disposition","attachment;filename="+ URLEncoder.encode(fileName,"utf-8"));
            byte[] car=new byte[1024];
            int L=0;
            while((L=in.read(car))!=-1){
                out.write(car, 0,L);
            }
            if(out!=null){
                out.flush();
                out.close();
            }
            if(in!=null){
                in.close();
            }
            ossClient.shutdown();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 獲得圖片路徑
     *
     * @param fileUrl
     * @return
     */
    public String getImgUrl(String fileUrl) {
        System.out.println("fileUrl="+fileUrl);
        if (!StringUtils.isEmpty(fileUrl)) {
            String[] split = fileUrl.split("/");
            return this.getUrl(this.filedir + split[split.length - 1]);
        }
        return null;
    }
}

文件上傳

OSSClientUtil ossClient = new OSSClientUtil();
String name = ossClient.uploadImg2Oss(file);

文件下載

OSSClientUtil ossClient = new OSSClientUtil();	
ossClient.getFile(response,request,attach.getAttachName(),attach.getFileName());

文件刪除

OSSClientUtil ossClient = new OSSClientUtil();
ossClient.deleteFile(attachPhotoLocation.getAttachName());

讀取圖片流

		OSSClientUtil ossClient = new OSSClientUtil();
		String imgUrl = ossClient.getImgUrl(file.getAttachName());
		URL url = new URL(imgUrl);
		URLConnection conn = url.openConnection();
		InputStream inStream = conn.getInputStream();
		response.setContentType("image/jpg"); // 設置返回的文件類型
		response.setHeader("Access-Control-Allow-Origin", "*");// 設置該圖片允許跨域訪問
		//compile "commons-io:commons-io:2.3"
		//import org.apache.commons.io.IOUtils;
		IOUtils.copy(inStream, response.getOutputStream());