com.mongodb.client.gridfs

接口 GridFSBucket

@ThreadSafe
public interface GridFSBucket

Represents a GridFS Bucket

从以下版本开始:

3.1

方法概要

限定符和类型	方法和说明
void	delete(BsonValue id) Given a id, delete this stored file's files collection document and associated chunks from a GridFS bucket.
void	delete(ObjectId id) Given a id, delete this stored file's files collection document and associated chunks from a GridFS bucket.
void	downloadToStream(BsonValue id, java.io.OutputStream destination) Downloads the contents of the stored file specified by id and writes the contents to the destination Stream.
void	downloadToStream(ObjectId id, java.io.OutputStream destination) Downloads the contents of the stored file specified by id and writes the contents to the destination Stream.
void	downloadToStream(java.lang.String filename, java.io.OutputStream destination) Downloads the contents of the latest version of the stored file specified by filename and writes the contents to the destination Stream.
void	downloadToStream(java.lang.String filename, java.io.OutputStream destination, GridFSDownloadOptions options) Downloads the contents of the stored file specified by filename and by the revision in options and writes the contents to the destination Stream.
void	downloadToStreamByName(java.lang.String filename, java.io.OutputStream destination) 已过时。 use downloadToStream(String, OutputStream) instead.
void	downloadToStreamByName(java.lang.String filename, java.io.OutputStream destination, GridFSDownloadByNameOptions options) 已过时。 use downloadToStream(String, OutputStream, GridFSDownloadOptions) instead.
void	drop() Drops the data associated with this bucket from the database.
GridFSFindIterable	find() Finds all documents in the files collection.
GridFSFindIterable	find(Bson filter) Finds all documents in the collection that match the filter.
java.lang.String	getBucketName() The bucket name.
int	getChunkSizeBytes() Sets the chunk size in bytes.
ReadConcern	getReadConcern() Get the read concern for the GridFSBucket.
ReadPreference	getReadPreference() Get the read preference for the GridFSBucket.
WriteConcern	getWriteConcern() Get the write concern for the GridFSBucket.
GridFSDownloadStream	openDownloadStream(BsonValue id) Opens a Stream from which the application can read the contents of the stored file specified by id.
GridFSDownloadStream	openDownloadStream(ObjectId id) Opens a Stream from which the application can read the contents of the stored file specified by id.
GridFSDownloadStream	openDownloadStream(java.lang.String filename) Opens a Stream from which the application can read the contents of the latest version of the stored file specified by the filename.
GridFSDownloadStream	openDownloadStream(java.lang.String filename, GridFSDownloadOptions options) Opens a Stream from which the application can read the contents of the stored file specified by filename and the revision in options.
GridFSDownloadStream	openDownloadStreamByName(java.lang.String filename) 已过时。 use openDownloadStream(String) instead.
GridFSDownloadStream	openDownloadStreamByName(java.lang.String filename, GridFSDownloadByNameOptions options) 已过时。 use openDownloadStream(String, GridFSDownloadOptions) instead.
GridFSUploadStream	openUploadStream(BsonValue id, java.lang.String filename) Opens a Stream that the application can write the contents of the file to.
GridFSUploadStream	openUploadStream(BsonValue id, java.lang.String filename, GridFSUploadOptions options) Opens a Stream that the application can write the contents of the file to.
GridFSUploadStream	openUploadStream(java.lang.String filename) Opens a Stream that the application can write the contents of the file to.
GridFSUploadStream	openUploadStream(java.lang.String filename, GridFSUploadOptions options) Opens a Stream that the application can write the contents of the file to.
void	rename(BsonValue id, java.lang.String newFilename) Renames the stored file with the specified id.
void	rename(ObjectId id, java.lang.String newFilename) Renames the stored file with the specified id.
void	uploadFromStream(BsonValue id, java.lang.String filename, java.io.InputStream source) Uploads the contents of the given InputStream to a GridFS bucket.
void	uploadFromStream(BsonValue id, java.lang.String filename, java.io.InputStream source, GridFSUploadOptions options) Uploads the contents of the given InputStream to a GridFS bucket.
ObjectId	uploadFromStream(java.lang.String filename, java.io.InputStream source) Uploads the contents of the given InputStream to a GridFS bucket.
ObjectId	uploadFromStream(java.lang.String filename, java.io.InputStream source, GridFSUploadOptions options) Uploads the contents of the given InputStream to a GridFS bucket.
GridFSBucket	withChunkSizeBytes(int chunkSizeBytes) Create a new GridFSBucket instance with a new chunk size in bytes.
GridFSBucket	withReadConcern(ReadConcern readConcern) Create a new MongoDatabase instance with a different read concern.
GridFSBucket	withReadPreference(ReadPreference readPreference) Create a new GridFSBucket instance with a different read preference.
GridFSBucket	withWriteConcern(WriteConcern writeConcern) Create a new GridFSBucket instance with a different write concern.

方法详细资料

getBucketName

java.lang.String getBucketName()

The bucket name.

返回:

the bucket name

getChunkSizeBytes

int getChunkSizeBytes()

Sets the chunk size in bytes. Defaults to 255.

返回:

the chunk size in bytes.

getWriteConcern

WriteConcern getWriteConcern()

Get the write concern for the GridFSBucket.

返回:

the WriteConcern

getReadPreference

ReadPreference getReadPreference()

Get the read preference for the GridFSBucket.

返回:

the ReadPreference

getReadConcern

ReadConcern getReadConcern()

Get the read concern for the GridFSBucket.

返回:

the ReadConcern

从以下版本开始:

3.2

MongoDB documentation

Read Concern

Since server release

3.2

withChunkSizeBytes

GridFSBucket withChunkSizeBytes(int chunkSizeBytes)

Create a new GridFSBucket instance with a new chunk size in bytes.

参数:

chunkSizeBytes - the new chunk size in bytes.

返回:

a new GridFSBucket instance with the different chunk size in bytes

withReadPreference

GridFSBucket withReadPreference(ReadPreference readPreference)

Create a new GridFSBucket instance with a different read preference.

参数:

readPreference - the new ReadPreference for the database

返回:

a new GridFSBucket instance with the different readPreference

withWriteConcern

GridFSBucket withWriteConcern(WriteConcern writeConcern)

Create a new GridFSBucket instance with a different write concern.

参数:

writeConcern - the new WriteConcern for the database

返回:

a new GridFSBucket instance with the different writeConcern

withReadConcern

GridFSBucket withReadConcern(ReadConcern readConcern)

Create a new MongoDatabase instance with a different read concern.

参数:

readConcern - the new ReadConcern for the database

返回:

a new GridFSBucket instance with the different ReadConcern

从以下版本开始:

3.2

MongoDB documentation

Read Concern

Since server release

3.2

openUploadStream

GridFSUploadStream openUploadStream(java.lang.String filename)

Opens a Stream that the application can write the contents of the file to.

As the application writes the contents to the returned Stream, the contents are uploaded as chunks in the chunks collection. When the application signals it is done writing the contents of the file by calling close on the returned Stream, a files collection document is created in the files collection.

参数:

filename - the filename for the stream

返回:

the GridFSUploadStream that provides the ObjectId for the file to be uploaded and the Stream to which the application will write the contents.

openUploadStream

GridFSUploadStream openUploadStream(java.lang.String filename,
                                    GridFSUploadOptions options)

Opens a Stream that the application can write the contents of the file to.

As the application writes the contents to the returned Stream, the contents are uploaded as chunks in the chunks collection. When the application signals it is done writing the contents of the file by calling close on the returned Stream, a files collection document is created in the files collection.

参数:

filename - the filename for the stream

options - the GridFSUploadOptions

返回:

the GridFSUploadStream that provides the ObjectId for the file to be uploaded and the Stream to which the application will write the contents.

openUploadStream

GridFSUploadStream openUploadStream(BsonValue id,
                                    java.lang.String filename)

Opens a Stream that the application can write the contents of the file to.

As the application writes the contents to the returned Stream, the contents are uploaded as chunks in the chunks collection. When the application signals it is done writing the contents of the file by calling close on the returned Stream, a files collection document is created in the files collection.

参数:

id - the custom id value of the file

filename - the filename for the stream

返回:

the GridFSUploadStream that provides the ObjectId for the file to be uploaded and the Stream to which the application will write the contents.

从以下版本开始:

3.3

openUploadStream

GridFSUploadStream openUploadStream(BsonValue id,
                                    java.lang.String filename,
                                    GridFSUploadOptions options)

Opens a Stream that the application can write the contents of the file to.

As the application writes the contents to the returned Stream, the contents are uploaded as chunks in the chunks collection. When the application signals it is done writing the contents of the file by calling close on the returned Stream, a files collection document is created in the files collection.

参数:

id - the custom id value of the file

filename - the filename for the stream

options - the GridFSUploadOptions

返回:

the GridFSUploadStream that includes the _id for the file to be uploaded and the Stream to which the application will write the contents.

从以下版本开始:

3.3

uploadFromStream

ObjectId uploadFromStream(java.lang.String filename,
                          java.io.InputStream source)

Uploads the contents of the given InputStream to a GridFS bucket.

Reads the contents of the user file from the Stream and uploads it as chunks in the chunks collection. After all the chunks have been uploaded, it creates a files collection document for filename in the files collection.

参数:

filename - the filename for the stream

source - the Stream providing the file data

返回:

the ObjectId of the uploaded file.

uploadFromStream

ObjectId uploadFromStream(java.lang.String filename,
                          java.io.InputStream source,
                          GridFSUploadOptions options)

Uploads the contents of the given InputStream to a GridFS bucket.

Reads the contents of the user file from the Stream and uploads it as chunks in the chunks collection. After all the chunks have been uploaded, it creates a files collection document for filename in the files collection.

参数:

filename - the filename for the stream

source - the Stream providing the file data

options - the GridFSUploadOptions

返回:

the ObjectId of the uploaded file.

uploadFromStream

void uploadFromStream(BsonValue id,
                      java.lang.String filename,
                      java.io.InputStream source)

Uploads the contents of the given InputStream to a GridFS bucket.

Reads the contents of the user file from the Stream and uploads it as chunks in the chunks collection. After all the chunks have been uploaded, it creates a files collection document for filename in the files collection.

参数:

id - the custom id value of the file

filename - the filename for the stream

source - the Stream providing the file data

从以下版本开始:

3.3

uploadFromStream

void uploadFromStream(BsonValue id,
                      java.lang.String filename,
                      java.io.InputStream source,
                      GridFSUploadOptions options)

Uploads the contents of the given InputStream to a GridFS bucket.

Reads the contents of the user file from the Stream and uploads it as chunks in the chunks collection. After all the chunks have been uploaded, it creates a files collection document for filename in the files collection.

参数:

id - the custom id value of the file

filename - the filename for the stream

source - the Stream providing the file data

options - the GridFSUploadOptions

从以下版本开始:

3.3

openDownloadStream

GridFSDownloadStream openDownloadStream(ObjectId id)

Opens a Stream from which the application can read the contents of the stored file specified by id.

参数:

id - the ObjectId of the file to be put into a stream.

返回:

the stream

downloadToStream

void downloadToStream(ObjectId id,
                      java.io.OutputStream destination)

Downloads the contents of the stored file specified by id and writes the contents to the destination Stream.

参数:

id - the ObjectId of the file to be written to the destination stream

destination - the destination stream

openDownloadStream

GridFSDownloadStream openDownloadStream(BsonValue id)

Opens a Stream from which the application can read the contents of the stored file specified by id.

参数:

id - the custom id value of the file, to be put into a stream.

返回:

the stream

downloadToStream

void downloadToStream(BsonValue id,
                      java.io.OutputStream destination)

Downloads the contents of the stored file specified by id and writes the contents to the destination Stream.

参数:

id - the custom id of the file, to be written to the destination stream

destination - the destination stream

downloadToStream

void downloadToStream(java.lang.String filename,
                      java.io.OutputStream destination)

Downloads the contents of the latest version of the stored file specified by filename and writes the contents to the destination Stream.

参数:

filename - the name of the file to be downloaded

destination - the destination stream

从以下版本开始:

3.3

downloadToStream

void downloadToStream(java.lang.String filename,
                      java.io.OutputStream destination,
                      GridFSDownloadOptions options)

Downloads the contents of the stored file specified by filename and by the revision in options and writes the contents to the destination Stream.

参数:

filename - the name of the file to be downloaded

destination - the destination stream

options - the download options

从以下版本开始:

3.3

openDownloadStream

GridFSDownloadStream openDownloadStream(java.lang.String filename)

Opens a Stream from which the application can read the contents of the latest version of the stored file specified by the filename.

参数:

filename - the name of the file to be downloaded

返回:

the stream

从以下版本开始:

3.3

openDownloadStream

GridFSDownloadStream openDownloadStream(java.lang.String filename,
                                        GridFSDownloadOptions options)

Opens a Stream from which the application can read the contents of the stored file specified by filename and the revision in options.

参数:

filename - the name of the file to be downloaded

options - the download options

返回:

the stream

从以下版本开始:

3.3

find

GridFSFindIterable find()

Finds all documents in the files collection.

返回:

the GridFS find iterable interface

MongoDB documentation

Find

find

GridFSFindIterable find(Bson filter)

Finds all documents in the collection that match the filter.

Below is an example of filtering against the filename and some nested metadata that can also be stored along with the file data:

  
      Filters.and(Filters.eq("filename", "mongodb.png"), Filters.eq("metadata.contentType", "image/png"));
  
  

参数:

filter - the query filter

返回:

the GridFS find iterable interface

另请参阅:

Filters

delete

void delete(ObjectId id)

Given a id, delete this stored file's files collection document and associated chunks from a GridFS bucket.

参数:

id - the ObjectId of the file to be deleted

delete

void delete(BsonValue id)

Given a id, delete this stored file's files collection document and associated chunks from a GridFS bucket.

参数:

id - the id of the file to be deleted

从以下版本开始:

3.3

rename

void rename(ObjectId id,
            java.lang.String newFilename)

Renames the stored file with the specified id.

参数:

id - the id of the file in the files collection to rename

newFilename - the new filename for the file

rename

void rename(BsonValue id,
            java.lang.String newFilename)

Renames the stored file with the specified id.

参数:

id - the id of the file in the files collection to rename

newFilename - the new filename for the file

从以下版本开始:

3.3

drop

void drop()

Drops the data associated with this bucket from the database.

openDownloadStreamByName

@Deprecated
GridFSDownloadStream openDownloadStreamByName(java.lang.String filename)

已过时。 use openDownloadStream(String) instead.

Opens a Stream from which the application can read the contents of the latest version of the stored file specified by the filename.

参数:

filename - the name of the file to be downloaded

返回:

the stream

openDownloadStreamByName

@Deprecated
GridFSDownloadStream openDownloadStreamByName(java.lang.String filename,
                                                          GridFSDownloadByNameOptions options)

已过时。 use openDownloadStream(String, GridFSDownloadOptions) instead.

Opens a Stream from which the application can read the contents of the stored file specified by filename and the revision in options.

参数:

filename - the name of the file to be downloaded

options - the download options

返回:

the stream

downloadToStreamByName

@Deprecated
void downloadToStreamByName(java.lang.String filename,
                                        java.io.OutputStream destination)

已过时。 use downloadToStream(String, OutputStream) instead.

Downloads the contents of the latest version of the stored file specified by filename and writes the contents to the destination Stream.

参数:

filename - the name of the file to be downloaded

destination - the destination stream

downloadToStreamByName

@Deprecated
void downloadToStreamByName(java.lang.String filename,
                                        java.io.OutputStream destination,
                                        GridFSDownloadByNameOptions options)

已过时。 use downloadToStream(String, OutputStream, GridFSDownloadOptions) instead.

Downloads the contents of the stored file specified by filename and by the revision in options and writes the contents to the destination Stream.

参数:

filename - the name of the file to be downloaded

destination - the destination stream

options - the download options