Spring Boot 2.0.1发行版中的GridFSDBFile [英] GridFSDBFile in spring boot 2.0.1 release

问题描述

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.

I am trying to migrate spring boot 1.5.7 to its latest version realease 2.0.1. In the old version I used this syntax to recover a file.

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

Do you know how it would be done in the new version? I need

file.setInputStream(gridFsdbFile.getInputStream());

ty！

推荐答案

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

You can define gridFSBucket in MongoConfiguration like this

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

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