java - spring boot 2.0.1 版本中的 GridFSDBFile

Question

我正在尝试将 spring boot 1.5.7 迁移到其最新版本 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)));

你知道新版本会怎么做吗？我需要

file.setInputStream(gridFsdbFile.getInputStream());

太好了!

Answer 1

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);
}