阿里云OSS文件上传工具类(工作案例)

阿里云OSS文件上传工具类，在实际工作中能够正常运用

代码如下：

public class AliyunOSSClientUtil {
    // log日志
    private static Logger logger = LoggerFactory.getLogger(AliyunOSSClientUtil.class);
    //oss客户端连接
    private static OSS ossclient = null;


    /**
     * 获得阿里云OSS客户端对象
     *
     * @param ossEndpoint
     * @param accessId
     * @param accessKey
     * @return
     */
    public static OSS getOssClient(String ossEndpoint, String accessId, String accessKey) {
        if (ossclient == null) {
            ossclient = new OSSClientBuilder().build(ossEndpoint, accessId, accessKey);
        }
        return ossclient;
    }


    /**
     * 创建存储空间
     *
     * @param ossClient  OSS连接
     * @param bucketName 存储空间
     * @return
     */
    public static String createBucketName(OSS ossClient, String bucketName) {
        // 存储空间
        final String bucketNames = bucketName;
        if (!ossClient.doesBucketExist(bucketName)) {
            // 创建存储空间
            Bucket bucket = ossClient.createBucket(bucketName);
            logger.info("创建存储空间成功");
            return bucket.getName();
        }
        return bucketNames;
    }


    /**
     * 删除存储空间bucketName
     *
     * @param ossClient  oss对象
     * @param bucketName 存储空间
     */
    public static void deleteBucket(OSS ossClient, String bucketName) {
        ossClient.deleteBucket(bucketName);
        logger.info("删除" + bucketName + "Bucket成功");
    }


    /**
     * 创建模拟文件夹:多级目录
     *
     * @param ossClient  oss连接
     * @param bucketName 存储空间
     * @param folder     模拟文件夹名如"upload/2023/01/11/"
     * @return 文件夹名
     */
    public static String createFolder(OSS ossClient, String bucketName, String folder) {
        // 文件夹名
        final String keySuffixWithSlash = folder;
        // 判断文件夹是否存在，不存在则创建
        if (!ossClient.doesObjectExist(bucketName, keySuffixWithSlash)) {
            // 创建文件夹
            ossClient.putObject(bucketName, keySuffixWithSlash, new ByteArrayInputStream(new byte[0]));
            logger.info("创建文件夹成功");
            // 得到文件夹名
            OSSObject object = ossClient.getObject(bucketName, keySuffixWithSlash);
            String fileDir = object.getKey();
            return fileDir;
        }
        return keySuffixWithSlash;
    }


    /**
     * 根据key删除OSS服务器上的文件
     *
     * @param ossClient  oss连接
     * @param bucketName 存储空间
     * @param key        Bucket下的文件的路径名+文件名 如："upload/2023/01/11/cake.jpg"
     */
    public static void deleteObject(OSS ossClient, String bucketName, String key) {
        ossClient.deleteObject(bucketName, key);
        logger.info("删除" + bucketName + "下的文件" + key + "成功");
    }


    /**
     * 上传文件
     *
     * @param ossClient  oss连接
     * @param bucketName 存储空间
     * @param ossPath    上传文件相对路径+文件名如"upload/2023/01/11/cake.jpg"
     * @param is         以输入流的形式上传文件
     * @param fileName   上传文件后新文件名
     * @return String 返回的唯一MD5数字签名
     */
    public static String uploadFileOss(OSS ossClient, String bucketName, String ossPath, InputStream is, String fileName) {
        try {
            // 文件大小
            long fileSize = is.available();
            // 创建上传Object的Metadata
            ObjectMetadata metadata = new ObjectMetadata();
            // 上传的文件的长度
            metadata.setContentLength(is.available());
            // 指定该Object被下载时的网页的缓存行为
            metadata.setCacheControl("no-cache");
            // 指定该Object下设置Header
            metadata.setHeader("Pragma", "no-cache");
            // 指定该Object被下载时的内容编码格式
            metadata.setContentEncoding("utf-8");
            // 文件的MIME，定义文件的类型及网页编码，决定浏览器将以什么形式、什么编码读取文件。如果用户没有指定则根据Key或文件名的扩展名生成，
            // 如果没有扩展名则填默认值application/octet-stream
            metadata.setContentType(getContentType(fileName));
            // 指定该Object被下载时的名称（指示MINME用户代理如何显示附加的文件，打开或下载，及文件名称）
            metadata.setContentDisposition("filename/filesize=" + fileName + "/" + fileSize + "Byte");
            //上传文件到OSS时需要指定包含文件后缀在内的完整路径如ossPath="upload/2023/01/11/cake.jpg"
            PutObjectResult putResult = ossClient.putObject(bucketName, ossPath, is, metadata);
            // 解析结果
            String resultStr = putResult.getETag();
            logger.info("唯一MD5数字签名:" + resultStr);
            //上传文件后相对路径如"upload/2023/01/11/cake.jpg"
            String path = ossPath;
            return path;
        } catch (Exception e) {
            e.printStackTrace();
            logger.error("上传阿里云OSS服务器异常." + e.getMessage(), e);
            return null;
        }
    }


    /**
     * 下载文件到本地
     *
     * @param ossClient     oss连接
     * @param bucketName    存储空间
     * @param key           Bucket下的文件的路径名+文件名 如："upload/2023/01/11/cake.jpg"
     * @param localFilePath 下载本地文件绝对路径如"C:\Users\Administrator\Desktop\oss-download\xxx.pdf"
     */
    public static void downloadFileOss(OSS ossClient, String bucketName, String key, String localFilePath) {
        try {
            //创建本地文件
            File file = new File(localFilePath);
            GetObjectRequest objectRequest = new GetObjectRequest(bucketName, key);
            //下载OSS文件到本地文件，若指定的本地文件存在则覆盖，否则新建
            ossClient.getObject(objectRequest, file);
            logger.info("下载文件到本地成功");
        } catch (OSSException e) {
            e.printStackTrace();
        } catch (ClientException e) {
            e.printStackTrace();
        }
    }


    /**
     * 获取上传文件对象
     * 备注：最重要的是获取上传文件的输出流InputStream
     *
     * @param ossClient  oss连接
     * @param bucketName 存储空间
     * @param key        Bucket下的文件的路径名+文件名 如："upload/2023/01/11/cake.jpg"
     * @return
     */
    public static OSSObject getObject(OSS ossClient, String bucketName, String key) {
        OSSObject object = null;
        try {
            object = ossClient.getObject(bucketName, key);
            //文件大小
            long fileSize = object.getObjectMetadata().getContentLength();
            //文件相对路径
            String ossPath = object.getKey();
            //文件输入流
            InputStream is = object.getObjectContent();
            logger.info("success to getObject,fileSize:" + fileSize + "\nossPath:" + ossPath + "\ninputStream:" + is);
        } catch (OSSException e) {
            e.printStackTrace();
        } catch (ClientException e) {
            e.printStackTrace();
        }
        return object;
    }


    /**
     * 获取上传文件url
     *
     * @param ossClient
     * @param bucketName
     * @param key
     * @return
     */
    public static String getUrl(OSS ossClient, String bucketName, String key) {
        //设置URl过期时间为99年：3600L*1000*24*365*99
        Date expiration = new Date(new Date().getTime() + 3600l * 1000 * 24 * 365 * 99);
        GeneratePresignedUrlRequest generatePresignedUrlRequest = new GeneratePresignedUrlRequest(bucketName, key);
        generatePresignedUrlRequest.setExpiration(expiration);
        URL url = ossClient.generatePresignedUrl(generatePresignedUrlRequest);
        String returnUrl = url.toString();
        return returnUrl;
    }


    /**
     * 通过文件名判断并获取OSS服务文件上传时文件的contentType
     *
     * @param fileName 文件名
     * @return 文件的contentType
     */
    public static String getContentType(String fileName) {
        // 文件的后缀名
        String fileExtension = fileName.substring(fileName.lastIndexOf("."));
        logger.info("getContentType->fileName={},fileExtension={}", fileName, fileExtension);
        for (AliyunOssFileTypeEnum e : AliyunOssFileTypeEnum.values()) {
            if (e.getCode().equalsIgnoreCase(fileExtension)) {
                return e.getText();
            }
        }
        // 默认返回类型
        return AliyunOssFileTypeEnum.TXT.getText();
    }


    // 测试
    public static void main(String[] args) throws FileNotFoundException {
        //阿里云OSS账号自行到阿里云官网申请
		String ossEndpoint = "XXX";
        String accessId = "XXX";
        String accessKey = "XXX";
        String bucketName = "test";
        // 初始化OSSClient
        OSS ossClient = AliyunOSSClientUtil.getOssClient(ossEndpoint, accessId, accessKey);


        //测试创建多级目录
        /*String tmpDir = "upload/2023/01/11/";
        String folder = createFolder(ossClient, bucketName, tmpDir);
        System.out.println("folder:"+folder);*/


        //测试删除文件
        /*String key="upload/2023/01/11/xxx.pdf";
        deleteObject(ossClient,bucketName,key);*/


        //测试上传文件
        /*String pathAndname = "C:\\Users\\Administrator\\Desktop\\测试文件上传\\xxx.pdf";
        File file = new File(pathAndname);
        //原始文件名:带后缀
        String oldfilename = file.getName();
        //新文件名：带后缀
        String newfilename = "9065df0f3ab72419b36d2dec088e11d6.pdf";//可以自行生成随机唯一文件名
        String newpath = "C:\\Users\\Administrator\\Desktop\\upload\\2023\\01\\11\\";
        String ossPath = newpath + newfilename;
        InputStream is = new FileInputStream(file);
        String absolutePath = uploadFileOss(ossClient, bucketName, ossPath, is, newfilename);
        System.out.println("absolutePath:"+absolutePath);*/


        //测试获取文件url
        /*String key="upload/2023/01/11/9065df0f3ab72419b36d2dec088e11d6.pdf";
        String url = getUrl(ossClient, bucketName, key);
        System.out.println("url:"+url);*/


        //测试获取上传对象
        /*String key = "upload/2023/01/11/9065df0f3ab72419b36d2dec088e11d6.pdf";
        getObject(ossClient, bucketName, key);*/


        //测试下载文件到本地
        /*String key = "upload/2023/01/11/9065df0f3ab72419b36d2dec088e11d6.pdf";
        String localFilePath = "C:\\Users\\Administrator\\Desktop\\oss-download\\xxx.pdf";
        downloadFileOss(ossClient, bucketName, key, localFilePath);*/
	}	

文件类型枚举值：

public enum AliyunOssFileTypeEnum {
     BMP(".bmp","image/bmp"),
     GIF(".gif","image/gif"),
     JPEG(".jpeg","image/jpeg"),
     JPG(".jpg","image/jpeg"),
     PNG(".png","image/jpeg"),
     HTML(".html","text/html"),
     XML(".xml","text/xml"),
     TXT(".txt","application/octet-stream"),
     SQL(".sql","application/octet-stream"),
     VSD(".vsd","application/vnd.visio"),
     PDF(".pdf","application/pdf"),
     PPT(".ppt","application/vnd.ms-powerpoint"),
     PPTX(".pptx","application/vnd.ms-powerpoint"),
     DOC(".doc","application/msword"),
     DOCX(".docx","application/msword"),
     XLS(".xls","application/vnd.ms-excel"),
     XLSX(".xlsx","application/vnd.ms-excel"),
     CSV(".csv","application/vnd.ms-excel");


     String code;


     String text;


     AliyunOssFileTypeEnum() {
     }


     AliyunOssFileTypeEnum(String code, String text) {
          this.code = code;
          this.text = text;
     }


     public String getCode() {
          return code;
     }


     public void setCode(String code) {
          this.code = code;
     }


     public String getText() {
          return text;
     }


     public void setText(String text) {
          this.text = text;
     }
}