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来源：互联网发布：好运来返奖统计软件编辑：程序博客网时间：2024/06/12 01:03

获取文件源Thread.currentThread().getContextClassLoader()  .getResource("").getFile();

mongodb的删除GridFS文件

if(isUseGridFS){    GridFS gridFiles = new GridFS(mongoTemplate.getDb());    gridFiles.remove(new Query().addCriteria(where("filename").regex("^"+fileInfo.getFileId())).getQueryObject());}else{    mongoTemplate.remove(new Query().addCriteria(where("id").is(fileInfo.getFileId())), FileExt.class);}

保存GridFS

    GridFS gfs = new GridFS(mongoTemplate.getDb());    GridFSInputFile gfsFile = gfs.createFile(inputStream);    gfsFile.setFilename(fileInfo.getFileId() + fileInfo.getExtension());    gfsFile.setMetaData(new BasicDBObject("aliases", fileInfo.getFileName() + fileInfo.getExtension()));    gfsFile.save();

查找文件

InputStream inputStream = null;    if(fileInfo.getUseGridFS()){        GridFS gfsPhoto = new GridFS(mongoTemplate.getDb());        GridFSDBFile gridFSDBFile = gfsPhoto.findOne(fileInfo.getFileId() + fileInfo.getExtension());        if(gridFSDBFile != null){            inputStream = gridFSDBFile.getInputStream();        } else {            log.warn("文件不存在 ");            response.sendError(HttpServletResponse.SC_NOT_FOUND, "文件不存在");            return false;        }    }

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