SpringBoot实现云存储功能

一、引入相应云平台SDK

    <dependency>
            <groupId>com.qiniu</groupId>
            <artifactId>qiniu-java-sdk</artifactId>
            <version>${qiniu.version}</version>
        </dependency>
        <dependency>
            <groupId>com.aliyun.oss</groupId>
            <artifactId>aliyun-sdk-oss</artifactId>
            <version>${aliyun.oss.version}</version>
        </dependency>
        <dependency>
            <groupId>com.qcloud</groupId>
            <artifactId>cos_api</artifactId>
            <version>${qcloud.cos.version}</version>
            <exclusions>
                <exclusion>
                    <groupId>org.slf4j</groupId>
                    <artifactId>slf4j-log4j12</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

二、定义抽象类 CloudStorageService ，用来声明上传的公共接口，如下所示：

/**
 * 云存储(支持七牛、阿里云、腾讯云、又拍云)
 *
 */
public abstract class CloudStorageService {
    /** 云存储配置信息 */
    CloudStorageConfig config;

    /**
     * 文件路径
     * @param prefix 前缀
     * @param suffix 后缀
     * @return 返回上传路径
     */
    public String getPath(String prefix, String suffix) {
        //生成uuid
        String uuid = UUID.randomUUID().toString().replaceAll("-", "");
        //文件路径
        String path = DateUtils.format(new Date(), "yyyyMMdd") + "/" + uuid;

        if(StringUtils.isNotBlank(prefix)){
            path = prefix + "/" + path;
        }

        return path + suffix;
    }

    /**
     * 文件上传
     * @param data    文件字节数组
     * @param path    文件路径，包含文件名
     * @return        返回http地址
     */
    public abstract String upload(byte[] data, String path);

    /**
     * 文件上传
     * @param data     文件字节数组
     * @param suffix   后缀
     * @return         返回http地址
     */
    public abstract String uploadSuffix(byte[] data, String suffix);

    /**
     * 文件上传
     * @param inputStream   字节流
     * @param path          文件路径，包含文件名
     * @return              返回http地址
     */
    public abstract String upload(InputStream inputStream, String path);

    /**
     * 文件上传
     * @param inputStream  字节流
     * @param suffix       后缀
     * @return             返回http地址
     */
    public abstract String uploadSuffix(InputStream inputStream, String suffix);

}

 三、

　　1、七牛上传的实现，只需继承 CloudStorageService ，并实现相应的上传接口，如下所示：

/**
 * 七牛云存储
 *
 */
public class QiniuCloudStorageService extends CloudStorageService {
    private UploadManager uploadManager;
    private String token;

    public QiniuCloudStorageService(CloudStorageConfig config){
        this.config = config;

        //初始化
        init();
    }

    private void init(){
        uploadManager = new UploadManager(new Configuration(Zone.autoZone()));
        token = Auth.create(config.getQiniuAccessKey(), config.getQiniuSecretKey()).
                uploadToken(config.getQiniuBucketName());
    }

    @Override
    public String upload(byte[] data, String path) {
        try {
            Response res = uploadManager.put(data, path, token);
            if (!res.isOK()) {
                throw new RuntimeException("上传七牛出错：" + res.toString());
            }
        } catch (Exception e) {
            throw new RRException("上传文件失败，请核对七牛配置信息", e);
        }

        return config.getQiniuDomain() + "/" + path;
    }

    @Override
    public String upload(InputStream inputStream, String path) {
        try {
            byte[] data = IOUtils.toByteArray(inputStream);
            return this.upload(data, path);
        } catch (IOException e) {
            throw new RRException("上传文件失败", e);
        }
    }

    @Override
    public String uploadSuffix(byte[] data, String suffix) {
        return upload(data, getPath(config.getQiniuPrefix(), suffix));
    }

    @Override
    public String uploadSuffix(InputStream inputStream, String suffix) {
        return upload(inputStream, getPath(config.getQiniuPrefix(), suffix));
    }
}

　　2、腾讯云上传的实现，只需继承 CloudStorageService ，并实现相应的上传接口，如下所示：

/**
 * 腾讯云存储
 *
 */
public class QcloudCloudStorageService extends CloudStorageService {
    private COSClient client;

    public QcloudCloudStorageService(CloudStorageConfig config){
        this.config = config;

        //初始化
        init();
    }

    private void init(){
        Credentials credentials = new Credentials(config.getQcloudAppId(), config.getQcloudSecretId(),
                config.getQcloudSecretKey());
        
        //初始化客户端配置
        ClientConfig clientConfig = new ClientConfig();
        //设置bucket所在的区域，华南：gz 华北：tj 华东：sh
        clientConfig.setRegion(config.getQcloudRegion());
        
        client = new COSClient(clientConfig, credentials);
    }

    @Override
    public String upload(byte[] data, String path) {
        //腾讯云必需要以"/"开头
        if(!path.startsWith("/")) {
            path = "/" + path;
        }
        
        //上传到腾讯云
        UploadFileRequest request = new UploadFileRequest(config.getQcloudBucketName(), path, data);
        String response = client.uploadFile(request);

        JSONObject jsonObject = JSONObject.parseObject(response);
        if(jsonObject.getInteger("code") != 0) {
            throw new RRException("文件上传失败，" + jsonObject.getString("message"));
        }

        return config.getQcloudDomain() + path;
    }

    @Override
    public String upload(InputStream inputStream, String path) {
        try {
            byte[] data = IOUtils.toByteArray(inputStream);
            return this.upload(data, path);
        } catch (IOException e) {
            throw new RRException("上传文件失败", e);
        }
    }

    @Override
    public String uploadSuffix(byte[] data, String suffix) {
        return upload(data, getPath(config.getQcloudPrefix(), suffix));
    }

    @Override
    public String uploadSuffix(InputStream inputStream, String suffix) {
        return upload(inputStream, getPath(config.getQcloudPrefix(), suffix));
    }
}

　　3、腾讯云上传的实现，只需继承 CloudStorageService ，并实现相应的上传接口，如下所示：

/**
 * 阿里云存储
 *
 */
public class AliyunCloudStorageService extends CloudStorageService {
    private OSSClient client;

    public AliyunCloudStorageService(CloudStorageConfig config){
        this.config = config;

        //初始化
        init();
    }

    private void init(){
        client = new OSSClient(config.getAliyunEndPoint(), config.getAliyunAccessKeyId(),
                config.getAliyunAccessKeySecret());
    }

    @Override
    public String upload(byte[] data, String path) {
        return upload(new ByteArrayInputStream(data), path);
    }

    @Override
    public String upload(InputStream inputStream, String path) {
        try {
            client.putObject(config.getAliyunBucketName(), path, inputStream);
        } catch (Exception e){
            throw new RRException("上传文件失败，请检查配置信息", e);
        }

        return config.getAliyunDomain() + "/" + path;
    }

    @Override
    public String uploadSuffix(byte[] data, String suffix) {
        return upload(data, getPath(config.getAliyunPrefix(), suffix));
    }

    @Override
    public String uploadSuffix(InputStream inputStream, String suffix) {
        return upload(inputStream, getPath(config.getAliyunPrefix(), suffix));
    }
}

四、对外提供了OSSFactory工厂，可方便业务的调用，如下所示： 

/**
 * 文件上传Factory
 *
 */
public final class OSSFactory {
    private static SysConfigService sysConfigService;

    static {
        OSSFactory.sysConfigService = (SysConfigService) SpringContextUtils.getBean("sysConfigService");
    }

    public static CloudStorageService build(){
        //获取云存储配置信息
        CloudStorageConfig config = sysConfigService.getConfigObject(ConfigConstant.CLOUD_STORAGE_CONFIG_KEY, CloudStorageConfig.class);

        if(config.getType() == Constant.CloudService.QINIU.getValue()){
            return new QiniuCloudStorageService(config);
        }else if(config.getType() == Constant.CloudService.ALIYUN.getValue()){
            return new AliyunCloudStorageService(config);
        }else if(config.getType() == Constant.CloudService.QCLOUD.getValue()){
            return new QcloudCloudStorageService(config);
        }

        return null;
    }

}

五、文件上传的例子，如下： 

    /**
     * 上传文件
     */
    @PostMapping("/upload")
    @RequiresPermissions("sys:oss:all")
    public R upload(@RequestParam("file") MultipartFile file) throws Exception {
        if (file.isEmpty()) {
            throw new RRException("上传文件不能为空");
        }

        //获取上传文件后缀
        String suffix = file.getOriginalFilename().substring(file.getOriginalFilename().lastIndexOf("."));
        //上传到aliyun/qiniucloud/Qcloud,并返回地址url
        String url = OSSFactory.build().uploadSuffix(file.getBytes(), suffix);

        //保存文件信息
        SysOssEntity ossEntity = new SysOssEntity();
        ossEntity.setUrl(url);
        ossEntity.setCreateDate(new Date());
        sysOssService.save(ossEntity);

        return R.ok().put("url", url);
    }