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UCloud US3 (原名UFile) SDK for Java

Version History

环境要求

  • 开发环境: Java 1.7或以上
  • 运行环境: Java 1.7或以上

API Doc

安装

  • Maven

    您可以通过在pom.xml中添加以下依赖项,来配置您的Maven项目

    <dependency>
        <groupId>cn.ucloud.ufile</groupId>
        <artifactId>ufile-client-java</artifactId>
        <version>latest-release-version</version>
    </dependency>
  • Gradle

    dependencies {
        /*
         * your other dependencies
         */
        implementation 'cn.ucloud.ufile:ufile-client-java:latest-release-version'
    }

快速入门

  • 基本说明:
    • 所有API均包含同步执行(execute)和异步执行(executeAsync)两种执行方式。

    • 同步执行会返回指定的业务结果类,若执行出错则会抛出UfileException为父类的异常;

    • 异步执行需要传入UfileCallback的回调接口,执行成功时会回调onResponse,泛型为回调结果(即:同步执行的返回类型),值得注意的是,若Ufile Server业务错误,也会回调onResponse,请注意结果类中的信息,若出现异常,则回调onError。

    • 如果是上传下载等耗时API,建议使用异步执行(executeAsync),并可以重写UfileCallback中的onProgress回调来进行进度监听

配置UfileClient

  • 必须在使用UfileClient之前调用,即:必须是UfileClient第一个调用的方法才有效。否则使用默认UfileClient.Config

    UfileClient.configure(new UfileClient.Config(
                    new HttpClient.Config(int maxIdleConnections, long keepAliveDuration, TimeUnit keepAliveTimeUnit)
                            .setTimeout(连接超时ms读取超时ms写入超时ms)
                            .setExecutorService(线程池)
                            .addInterceptor(okhttp3拦截器)
                            .addNetInterceptor(okhttp3网络拦截器)));

Bucket相关操作

// Bucket相关API的授权器
BucketAuthorization BUCKET_AUTHORIZER = new UfileBucketLocalAuthorization(
            "Your PublicKey", "Your PrivateKey");
            
UfileClient.bucket(BUCKET_AUTHORIZER)
    .APIs       // Bucket相关操作API
    .execute() or executeAsync(UfileCallback<T>)
创建Bucket
  • 同步

    try {
        BucketResponse res = UfileClient.bucket(BUCKET_AUTHORIZER)
            .createBucket(bucketName, region, bucketType)
            .execute();
    } catch (UfileClientException e) {
        e.printStackTrace();
    } catch (UfileServerException e) {
        e.printStackTrace();
    }
  • 异步

    UfileClient.bucket(BUCKET_AUTHORIZER)
        .createBucket(bucketName, region, bucketType)
        .executeAsync(new UfileCallback<BucketResponse>() {
            @Override
            public void onResponse(BucketResponse response) {
                
            }
        
            @Override
            public void onError(Request request, ApiError error, UfileErrorBean response) {
                
            }
    });

对象相关操作

关于ObjectConfig的region参数,是指您的bucket所创建在的地区编码,请参考UCloud 地区列表
// 对象相关API的授权器
ObjectAuthorization OBJECT_AUTHORIZER = new UfileObjectLocalAuthorization(
            "Your PublicKey", "Your PrivateKey");
            
/**
 * 您也可以创建远程对象相关API的授权器,远程授权器将签名私钥放于签名服务器上,更为安全
 * 远程签名服务端示例代码在 (https://github.com/ucloud/ufile-sdk-auth-server)
 * 您也可以自行继承ObjectRemoteAuthorization来重写远程签名逻辑
 */
ObjectAuthorization OBJECT_AUTHORIZER = new UfileObjectRemoteAuthorization(
            您的公钥,
            new ObjectRemoteAuthorization.ApiConfig(
                    "http://your_domain/applyAuth",
                    "http://your_domain/applyPrivateUrlAuth"
            ));
// 对象操作需要ObjectConfig来配置您的地区和域名后缀
ObjectConfig config = new ObjectConfig("your bucket region", "ufileos.com");

/** 
 * 您也可以使用已登记的自定义域名
 * 注意'http://www.your_domain.com'指向的是某个特定的bucket+region+域名后缀,
 * eg:http://www.your_domain.com -> www.your_bucket.bucket_region.ufileos.com
 */
ObjectConfig config = new ObjectConfig("http://www.your_domain.com");

/**
 * ObjectConfig同时支持从本地文件来导入
 * 配置文件内容必须是含有以下参数的json字符串:
 *     {"Region":"","ProxySuffix":""} 
 *     或
 *     {"CustomDomain":""}
 */
 try {
     ObjectConfig.loadProfile(new File("your config profile path"));
 } catch (UfileFileException e) {
     e.printStackTrace();
 }

UfileClient.object(OBJECT_AUTHORIZER, config)
    .APIs           // 对象存储相关API
    .execute() or executeAsync(UfileCallback<T>)
上传文件
  • 同步

    File file = new File("your file path");
    
    try {
        PutObjectResultBean response = UfileClient.object(Constants.OBJECT_AUTHORIZER, config)
             .putObject(file, "mimeType")
             .nameAs("save as keyName")
             .toBucket("upload to which bucket")
             /**
              * 是否上传校验MD5, Default = true
              */
         //  .withVerifyMd5(false)
             /**
              * 指定progress callback的间隔, Default = 每秒回调
              */
         //  .withProgressConfig(ProgressConfig.callbackWithPercent(10))
             /**
              * 配置进度监听
              */
             .setOnProgressListener(new OnProgressListener() {
                  @Override
                  public void onProgress(long bytesWritten, long contentLength) {
                      
                  }
             })
             .execute();
    } catch (UfileClientException e) {
        e.printStackTrace();
    } catch (UfileServerException e) {
        e.printStackTrace();
    }
  • 异步

    File file = new File("your file path");
    
    UfileClient.object(OBJECT_AUTHORIZER, config)
         .putObject(file, "mimeType")
         .nameAs("save as keyName")
         .toBucket("upload to which bucket")
         /**
          * 是否上传校验MD5, Default = true
          */
    //   .withVerifyMd5(false)
         /**
          *指定progress callback的间隔, Default = 每秒回调
          */
    //   .withProgressConfig(ProgressConfig.callbackWithPercent(10))
         .executeAsync(new UfileCallback<PutObjectResultBean>() {
             @Override
                public void onProgress(long bytesWritten, long contentLength) {
                    
                }
    
                @Override
                public void onResponse(PutObjectResultBean response) {
                    
                }
    
                @Override
                public void onError(Request request, ApiError error, UfileErrorBean response) {
                    
                }
         });

License

Apache License 2.0

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