Java SDK(3)

资源管理包含的主要系统有：

//构造一个带指定Zone对象的配置类
Configuration cfg = new Configuration(Zone.zone0());
//...其他参数参考类注释
String accessKey = "your access key";
String secretKey = "your secret key";
String bucket = "your bucket name";
String key = "your file key";
Auth auth = Auth.create(accessKey, secretKey);
BucketManager bucketManager = new BucketManager(auth, cfg);
try {
    FileInfo fileInfo = bucketManager.stat(bucket, key);
    System.out.println(fileInfo.hash);
    System.out.println(fileInfo.fsize);
    System.out.println(fileInfo.mimeType);
    System.out.println(fileInfo.putTime);
} catch (QiniuException ex) {
    System.err.println(ex.response.toString());
}

//构造一个带指定Zone对象的配置类
Configuration cfg = new Configuration(Zone.zone0());
//...其他参数参考类注释
String accessKey = "your access key";
String secretKey = "your secret key";
String bucket = "your bucket name";
String key = "your file key";
String newMimeType = "new mime type";
Auth auth = Auth.create(accessKey, secretKey);
BucketManager bucketManager = new BucketManager(auth, cfg);
//修改文件类型
try {
    bucketManager.changeMime(bucket, key, newMimeType);
} catch (QiniuException ex) {
    System.out.println(ex.response.toString());
}

移动操作本身支持移动文件到相近，不同空间中，在移动的同时也可以支持文档重命名。唯一的限制条件是，移动的源空间和目标空间必须在同一个机房。

源空间目标空间源文件名目标文件名描述

BucketA

BucketA

相当于同空间文件重命名

BucketA

BucketB

移动文件到BucketB，文件名一致

BucketA

BucketB

移动文件到BucketB，文件名变成KeyB

move操作支持强制覆盖选项，即因为目标文件已存在，可以增设强制覆盖参数force来覆盖那个文件的内容。

//构造一个带指定Zone对象的配置类
Configuration cfg = new Configuration(Zone.zone0());
//...其他参数参考类注释
String accessKey = "your access key";
String secretKey = "your secret key";
String fromBucket = "from bucket name";
String fromKey = "from key";
String toBucket = "to bucket name";
String toKey = "to key";
Auth auth = Auth.create(accessKey, secretKey);
BucketManager bucketManager = new BucketManager(auth, cfg);
try {
    bucketManager.move(fromBucket, fromKey, toBucket, toKey);
} catch (QiniuException ex) {
    //如果遇到异常，说明移动失败
    System.err.println(ex.code());
    System.err.println(ex.response.toString());
}

文件的复制和文档移动似乎操作一样，主要的差异是移动后源文档不存在了，而复制的结果是源文件还存在，只是多了一个新的文档副本。

//构造一个带指定Zone对象的配置类
Configuration cfg = new Configuration(Zone.zone0());
//...其他参数参考类注释
String accessKey = "your access key";
String secretKey = "your secret key";
String fromBucket = "from bucket name";
String fromKey = "from key";
String toBucket = "to bucket name";
String toKey = "to key";
Auth auth = Auth.create(accessKey, secretKey);
BucketManager bucketManager = new BucketManager(auth, cfg);
try {
    bucketManager.copy(fromBucket, fromKey, toBucket, toKey);
} catch (QiniuException ex) {
    //如果遇到异常，说明复制失败
    System.err.println(ex.code());
    System.err
}

//构造一个带指定Zone对象的配置类
Configuration cfg = new Configuration(Zone.zone0());
//...其他参数参考类注释
String accessKey = "your access key";
String secretKey = "your secret key";
String bucket = "your bucket name";
String key = "your file key";
Auth auth = Auth.create(accessKey, secretKey);
BucketManager bucketManager = new BucketManager(auth, cfg);
try {
    bucketManager.delete(bucket, key);
} catch (QiniuException ex) {
    //如果遇到异常，说明删除失败
    System.err.println(ex.code());
    System.err.println(ex.response.toString());
}

可以给早已存在于空间中的文档设置文档生存时间，如果更新已设置了生存时间但仍未被删除的文档的新的生存时间。

//构造一个带指定Zone对象的配置类
Configuration cfg = new Configuration(Zone.zone0());
//...其他参数参考类注释
String accessKey = "access key";
String secretKey = "secret key";
String bucket = "bucket name";
String key = "file key";
//过期天数，该文件10天后删除
int days = 10;
Auth auth = Auth.create(accessKey, secretKey);
BucketManager bucketManager = new BucketManager(auth, cfg);
try {
    bucketManager.deleteAfterDays(bucket, key, days);
} catch (QiniuException ex) {
    System.err.println(ex.response.toString());
}

//构造一个带指定Zone对象的配置类
Configuration cfg = new Configuration(Zone.zone0());
//...其他参数参考类注释
String accessKey = "your access key";
String secretKey = "your secret key";
String bucket = "your bucket name";
Auth auth = Auth.create(accessKey, secretKey);
BucketManager bucketManager = new BucketManager(auth, cfg);
//文件名前缀
String prefix = "";
//每次迭代的长度限制，最大1000，推荐值 1000
int limit = 1000;
//指定目录分隔符，列出所有公共前缀（模拟列出目录效果）。缺省值为空字符串
String delimiter = "";
//列举空间文件列表
BucketManager.FileListIterator fileListIterator = bucketManager.createFileListIterator(bucket, prefix, limit, delimiter);
while (fileListIterator.hasNext()) {
    //处理获取的file list结果
    FileInfo[] items = fileListIterator.next();
    for (FileInfo item : items) {
        System.out.println(item.key);
        System.out.println(item.hash);
        System.out.println(item.fsize);
        System.out.println(item.mimeType);
        System.out.println(item.putTime);
        System.out.println(item.endUser);
    }
}

//构造一个带指定Zone对象的配置类
Configuration cfg = new Configuration(Zone.zone0());
//...其他参数参考类注释
String accessKey = "your access key";
String secretKey = "your secret key";
String bucket = "your bucket name";
String key = "your file key";
String remoteSrcUrl = "http://devtools.qiniu.com/qiniu.png";
Auth auth = Auth.create(accessKey, secretKey);
BucketManager bucketManager = new BucketManager(auth, cfg);
//抓取网络资源到空间
try {
    FetchRet fetchRet = bucketManager.fetch(remoteSrcUrl, bucket, key);
    System.out.println(fetchRet.hash);
    System.out.println(fetchRet.key);
    System.out.println(fetchRet.mimeType);
    System.out.println(fetchRet.fsize);
} catch (QiniuException ex) {
    System.err.println(ex.response.toString());
}

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