java - Spring Boot 2.0.1发行版中的GridFSDBFile

我正在尝试将Spring Boot 1.5.7迁移到其最新版本的Realease 2.0.1。在旧版本中，我使用此语法来恢复文件。

GridFSDBFile gridFsdbFile = gridFsTemplate.findOne(new Query(Criteria.where("_id").is(fileId)));

您知道在新版本中将如何进行吗？我需要

file.setInputStream(gridFsdbFile.getInputStream());

ty!

最佳答案

GridFSFile gridFsdbFile = gridFsTemplate.findOne(new Query(Criteria.where("_id").is(id)));

GridFSDownloadStream gridFSDownloadStream = gridFSBucket.openDownloadStream(gridFsdbFile.getObjectId());
GridFsResource gridFsResource = new GridFsResource(gridFsdbFile,gridFSDownloadStream );

然后

file.setInputStream(gridFsResource.getInputStream());

您可以像这样在MongoConfiguration中定义gridFSBucket

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