GridFSDBFile in spring boot 2.0.1 release

GridFSFile gridFsdbFile = gridFsTemplate.findOne(new Query(Criteria.where("_id").is(id)));GridFSDownloadStream gridFSDownloadStream = gridFSBucket.openDownloadStream(gridFsdbFile.getObjectId());GridFsResource gridFsResource = new GridFsResource(gridFsdbFile,gridFSDownloadStream );

then

file.setInputStream(gridFsResource.getInputStream());

You can define gridFSBucket in MongoConfiguration like this

@Bean public GridFSBucket getGridFSBuckets() {MongoDatabase db = mongoDbFactory().getDb();return GridFSBuckets.create(db);}

Seems that since Spring Boot 2.0.x GridFS operations are mowing towards Resource approach.

Given you have unique file names in your GridFS, you can do like this:

gridFsTemplate.getResource("my-file-name.txt")

Any arbitary ID can be used instead of real file name to ensure its uniqueness when storing the file (e.g. ObjectId).

gridFsTemplate.store(inputStream, "5a55f1ea29485119f7a671a7")

Also there is commit in 2.1.0.M3 with helper method for getting resource by GridFSFile, but under the hood it still uses file name.

In order to get file content by pure ID you can use something like this:

GridFSBuckets.create(dbFactory.getDb()).openDownloadStream(gridFsFileId)

a temporary solution to leave it the same is to include the dependency

<dependency>    <groupId>org.springframework.data</groupId>    <artifactId>spring-data-mongodb</artifactId>    <version>1.10.11.RELEASE</version></dependency>

https://mvnrepository.com/artifact/org.springframework.data/spring-data-mongodb/1.10.11.RELEASE