參考博客：阿里OSS入門

bucket配置信息：alios.properties

OSS配置文件：AliOSSConfig.java

@Datapublic class AliOSSConfig {    private String endpoint;    private String accessKeyId;    private String accessKeySecret;    private String bucketName;    private  AliOSSConfig(){        Properties properties = new Properties();        try {            properties.load(AliOSSConfig.class.getResourceAsStream("/oss/alioss.properties"));        } catch (IOException e) {            e.printStackTrace();        }        endpoint = properties.getProperty("endpoint");        accessKeyId= properties.getProperty("accessKeyId");        accessKeySecret= properties.getProperty("accessKeySecret");        bucketName= properties.getProperty("bucketName");    }    private static AliOSSConfig instance = new AliOSSConfig();    public static AliOSSConfig getInstance() {        return instance;    }}

工具類：AliOSSUtil.java

public class AliOSSUtil {    private static final String endpoint = AliOSSConfig.getInstance().getEndpoint();    private static final String accessKeyId = AliOSSConfig.getInstance().getAccessKeyId();    private static final String accessKeySecret = AliOSSConfig.getInstance().getAccessKeySecret();    private static final String bucketName = AliOSSConfig.getInstance().getBucketName();    /**     * 將文件上傳到阿里OSS     *     * @param sourceFilePathName 本地文件     * @param aimFilePathName    在阿里OSS中保存的可以包含路徑的文件名     * @return 返回上傳后文件的訪問路徑     * @throws FileNotFoundException     */    public static String upload(String sourceFilePathName, String aimFilePathName) throws FileNotFoundException {        FileInputStream is = new FileInputStream(sourceFilePathName);        if (aimFilePathName.startsWith("/")) {            aimFilePathName = aimFilePathName.substring(1);        }        // 如果需要上傳時設置存儲類型與訪問權限，請參考以下示例代碼。        ObjectMetadata metadata = new ObjectMetadata();        int indexOfLastDot = aimFilePathName.lastIndexOf(".");        String suffix = aimFilePathName.substring(indexOfLastDot);        metadata.setContentType(getContentType(suffix));        //避免文件覆蓋        aimFilePathName = aimFilePathName.substring(0, indexOfLastDot) + System.currentTimeMillis() + suffix;        PutObjectRequest putObjectRequest = new PutObjectRequest(bucketName, aimFilePathName, is);        //避免訪問時將圖片下載下來        putObjectRequest.setMetadata(metadata);        OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);        ossClient.putObject(putObjectRequest);        Date expiration = new Date(System.currentTimeMillis() + 3600L * 1000 * 24 * 365 * 100);        URL url = ossClient.generatePresignedUrl(bucketName, aimFilePathName, expiration);        // 關閉ossClient        ossClient.shutdown();        return url.toString();    }    /**     * 網絡實現(xiàn)上傳頭像到OSS     *     * @param multipartFile     * @return     */    public static String upload(MultipartFile multipartFile) throws IOException {        // 獲取上傳的文件的輸入流        InputStream inputStream = multipartFile.getInputStream();        // 獲取文件名稱        String fileName = multipartFile.getOriginalFilename();        // 避免文件覆蓋        int i = fileName.lastIndexOf(".");        String suffix = fileName.substring(i);        fileName = fileName.substring(0, i) + System.currentTimeMillis() + suffix;        // 把文件按照日期進行分類        // 獲取當前日期        String datePath = DateTimeFormatter.ISO_DATE.format(LocalDate.now());        // 拼接fileName        fileName = datePath + "/" + fileName;        // 如果需要上傳時設置存儲類型與訪問權限        ObjectMetadata metadata = new ObjectMetadata();        metadata.setContentType(getContentType(fileName.substring(fileName.lastIndexOf("."))));        // 上傳文件到OSS時需要指定包含文件后綴在內的完整路徑，例如abc/efg/123.jpg。        PutObjectRequest putObjectRequest = new PutObjectRequest(bucketName, fileName, inputStream);        putObjectRequest.setMetadata(metadata);        OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);        ossClient.putObject(putObjectRequest);        //文件訪問路徑        Date expiration = new Date(System.currentTimeMillis() + 3600L * 1000 * 24 * 365 * 100);        URL url = ossClient.generatePresignedUrl(bucketName, fileName, expiration);        // 關閉ossClient        ossClient.shutdown();        // 把上傳到oss的路徑返回        return url.toString();    }    /**     * 返回contentType     *     * @param FileNameExtension     * @return     */    private 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/jpg";        }        return "image/jpg";    }    /**     * 列舉 指定路徑下所有的文件的文件名     * 如果要列出根路徑下的所有文件，path= ""     *     * @param path     * @return     */    public static List<String> listFileName(String path) {        List<String> res = new ArrayList<>();        // 構造ListObjectsRequest請求。        ListObjectsRequest listObjectsRequest = new ListObjectsRequest(bucketName);        // 設置prefix參數(shù)來獲取fun目錄下的所有文件。        listObjectsRequest.setPrefix(path);        OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);        // 列出文件。        ObjectListing listing = ossClient.listObjects(listObjectsRequest);        // 遍歷所有文件        for (OSSObjectSummary objectSummary : listing.getObjectSummaries()) {            System.out.println(objectSummary.getKey());        }        // 關閉OSSClient。        ossClient.shutdown();        return res;    }    /**     * 列舉文件下所有的文件url信息     */    public static List<String> listFileUrl(String path) {        List<String> res = new ArrayList<>();        // 構造ListObjectsRequest請求        ListObjectsRequest listObjectsRequest = new ListObjectsRequest(bucketName);        // 設置prefix參數(shù)來獲取fun目錄下的所有文件。        listObjectsRequest.setPrefix(path);        OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);        // 列出文件。        ObjectListing listing = ossClient.listObjects(listObjectsRequest);        // 遍歷所有文件。        for (OSSObjectSummary objectSummary : listing.getObjectSummaries()) {            //文件訪問路徑            Date expiration = new Date(System.currentTimeMillis() + 3600L * 1000 * 24 * 365 * 100);            URL url = ossClient.generatePresignedUrl(bucketName, objectSummary.getKey(), expiration);            res.add(url.toString());        }        // 關閉OSSClient。        ossClient.shutdown();        return res;    }    /**     * 判斷文件是否存在     *     * @param objectName     * @return     */    public static boolean isFileExist(String objectName) {        OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);        boolean res = ossClient.doesObjectExist(bucketName, objectName);        return res;    }    /**     * 通過文件名下載文件     *     * @param objectName    要下載的文件名     * @param localFileName 本地要創(chuàng)建的文件名     */    public static void downloadFile(String objectName, String localFileName) {        OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);        // 下載OSS文件到本地文件。如果指定的本地文件存在會覆蓋，不存在則新建。        ossClient.getObject(new GetObjectRequest(bucketName, objectName), new File(localFileName));        // 關閉OSSClient。        ossClient.shutdown();    }    /**     * 刪除文件或目錄     *     * @param objectName     */    public static void delelteFile(String objectName) {        OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);        ossClient.deleteObject(bucketName, objectName);        ossClient.shutdown();    }    /**     * 批量刪除文件或目錄     *     * @param keys     */    public static void deleteFiles(List<String> keys) {        OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);        // 刪除文件。        DeleteObjectsResult deleteObjectsResult = ossClient.deleteObjects(new DeleteObjectsRequest(bucketName).withKeys(keys));        java.util.List<String> deletedObjects = deleteObjectsResult.getDeletedObjects();        ossClient.shutdown();    }    /**     * 創(chuàng)建文件夾     *     * @param folder     * @return     */    public static String createFolder(String folder) {        // 文件夾名        final String keySuffixWithSlash = folder;        OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);        // 判斷文件夾是否存在，不存在則創(chuàng)建        if (!ossClient.doesObjectExist(bucketName, keySuffixWithSlash)) {            // 創(chuàng)建文件夾            ossClient.putObject(bucketName, keySuffixWithSlash, new ByteArrayInputStream(new byte[0]));            // 得到文件夾名            OSSObject object = ossClient.getObject(bucketName, keySuffixWithSlash);            String fileDir = object.getKey();            ossClient.shutdown();            return fileDir;        }        return keySuffixWithSlash;    }}

注意：為了避免OSS鏈接出現(xiàn) connection pool shutdown錯誤，不要在類中創(chuàng)建了OSSClient對象 ，因為這樣做的話所有方法共用此實例對象，在前端很短的時間內連續(xù)提交，造成異常錯誤。應該將OSSClient對象在方法中創(chuàng)建。

測試代碼

class AliOSSUtilTest {    @Test    void upload() throws FileNotFoundException {        //上傳文件        String url = AliOSSUtil.upload("E://圖片//510.jpg", "/aa/bb/ba.jpg");        System.out.println(url);    }    @Test    void listFileName() {        List<String> res = AliOSSUtil.listFileName("aa/");        res.forEach(System.out::println);    }    @Test    void listFileUrl() {        List<String> res = AliOSSUtil.listFileUrl("aa/");        res.forEach(System.out::println);    }    @Test    void isFileExist() {        boolean res = AliOSSUtil.isFileExist("aa/bb/ab1637160001528.jpg");        System.out.println(res);    }    @Test    void downloadFile() {        AliOSSUtil.downloadFile("aa/bb/ab1637160001528.jpg", "d:/aaawer.jpg");    }    @Test    void delelteFile() {        AliOSSUtil.delelteFile("aa/bb/ab1637160001528.jpg");    }    @Test    void deleteFiles() {        List<String> keys = List.of("aa/bb/ab1637160001528.jpg", "aa/bb/ba1637160268079.jpg","aa/bb/cc");        AliOSSUtil.deleteFiles(keys);    }    @Test    void createFolder() {        String folder = AliOSSUtil.createFolder("aa/bb/cc");        System.out.println(folder);    }}