依赖pom.xml

<dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-mongodb</artifactId>
    </dependency>

配置文件bootstrap.properties

pingruan.base.gridfs-enable=true
pingruan.base.gridfs-database=filecentor
pingruan.base.gridfs-host=192.168.164.100
pingruan.base.gridfs-port=27017
pingruan.base.gridfs-uri=mongodb://root:qwe123@192.168.164.100:27017

配置源码

//@Autowired
    //@Qualifier("gridFsUtil")
    //GridFsTemplate gridFsTemplate;
    /**
     * mongo文件存储-gridfs
     *
     * @author: vander
     * @create: 2018/12/05 11:19
     */
    @Configuration
    @ConditionalOnProperty(value="pingruan.base.gridfs-enable",havingValue="true")
    public class GridFsConfig {
        @Autowired
        BProperties bProperties;
        /**
         * 文件上传对象
         * 
         * @return
         * @throws Exception
         */
        @Bean(name="gridFsUtil")
        public GridFsTemplate gridFsTemplate() {
           return new GridFsTemplate(mongoDb(),mappingMongoConverter2());
        }
        @Bean
        public GridFSBucket getGridFSBucket(){
            MongoClient mongoClient = new MongoClient(new MongoClientURI(bProperties.getGridfsUri()));
            MongoDatabase database = mongoClient.getDatabase(bProperties.getGridfsDatabase());
            GridFSBucket bucket = GridFSBuckets.create(database);
            return bucket;
        }
        @Bean
        public MongoMappingContext mongoMappingContext2() {
            MongoMappingContext mappingContext = new MongoMappingContext();
            return mappingContext;
        }
        @Bean
        public MappingMongoConverter mappingMongoConverter2() {
            DefaultDbRefResolver dbRefResolver = new DefaultDbRefResolver(this.mongoDb());
            MappingMongoConverter converter = new MappingMongoConverter(dbRefResolver, this.mongoMappingContext2());
            converter.setTypeMapper(new DefaultMongoTypeMapper(null));
            return converter;
        }
        @Bean
        public MongoDbFactory mongoDb() {
            MongoClient mongoClient = new MongoClient(new MongoClientURI(bProperties.getGridfsUri()));
            return new SimpleMongoDbFactory(mongoClient,bProperties.getGridfsDatabase());
        }
    }
/**
 * mongodb-gridfs文件系统
 *
 *
 * @author: vander
 * @create: 2018/12/05 17:43
 */
@Controller
@RequestMapping("gridfs")
public class GridFSTestController extends BaseController {
    @Autowired(required=false)
    @Qualifier("gridFsUtil")
    GridFsTemplate gridFsTemplate;
    @Autowired(required=false)
    GridFSBucket gridFSBucket;
    @PostMapping("/upload")
    @ResponseBody
    public RestResult test(@RequestParam("file") MultipartFile file) throws IOException {
        String originalFilename = file.getOriginalFilename();
        InputStream inputStream = file.getInputStream();
        ObjectId yml = null;
        try {
            yml = gridFsTemplate.store(inputStream, originalFilename);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return ok(yml.toHexString());
    }
    @GetMapping("/download/{id}")
    public void testt(@PathVariable("id")String fileId) {
        //根据id查询文件
        GridFSFile gridFSFile = gridFsTemplate.findOne(Query.query(Criteria.where("_id").is(fileId)));
        //打开下载流对象
        GridFSDownloadStream gridFSDownloadStream = gridFSBucket.openDownloadStream(gridFSFile.getObjectId());
        //创建gridFsResource，用于获取流对象
        GridFsResource gridFsResource = new GridFsResource(gridFSFile, gridFSDownloadStream);
        //获取流中的数据
        InputStream inputStream = null;
        try {
            inputStream = gridFsResource.getInputStream();
            response.setCharacterEncoding(request.getCharacterEncoding());
            response.setContentType("application/octet-stream");
            response.setHeader("Content-Disposition", "attachment; filename=" + gridFsResource.getFilename());
            IOUtils.copy(inputStream, response.getOutputStream());
            response.flushBuffer();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                inputStream.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}