一、FastDFS环境搭建
我们使用Docker搭建FastDFS的开发环境
(1)拉取镜像
docker pull morunchang/fastdfs
(2)运行tracker
docker run -d --name tracker --net=host morunchang/fastdfs sh tracker.sh
(3)运行storage
docker run -d --name storage --net=host -e TRACKER_IP=<your tracker server address>:22122 -e GROUP_NAME=<group name> morunchang/fastdfs sh storage.sh
--使用的网络模式是–net=host, 替换为机器的Ip即可
--是组名,即storage的组
--如果想要增加新的storage服务器,再次运行该命令,注意更换 新组名
(4)修改nginx的配置
进入storage的容器内部,修改nginx.conf
docker exec -it storage /bin/bash
进入后
vi /data/nginx/conf/nginx.conf
添加以下内容
location /group1/M00 { proxy_next_upstream http_502 http_504 error timeout invalid_header; proxy_cache http-cache; proxy_cache_valid 200 304 12h; proxy_cache_key $uri$is_args$args; proxy_pass http://fdfs_group1; expires 30d; }
(5)退出容器
exit
(6)重启storage容器
docker restart storage
二、搭建文件存储微服务
创建文件管理微服务shangcheng_service_file,该工程主要用于实现文件上传以及文件删除等功能。
步骤一:修改pom.xml,引入依赖
<dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>net.oschina.zcx7878</groupId> <artifactId>fastdfs-client-java</artifactId> <version>1.27.0.0</version> </dependency> <dependency> <groupId>com.changgou</groupId> <artifactId>changgou_common</artifactId> <version>1.0-SNAPSHOT</version> </dependency> </dependencies>
步骤二:在resources文件夹下创建fasfDFS的配置文件fdfs_client.conf
connect_timeout = 60
network_timeout = 60
charset = UTF-8
http.tracker_http_port = 8080
tracker_server = 192.168.200.128:22122
connect_timeout:连接超时时间,单位为秒。
network_timeout:通信超时时间,单位为秒。发送或接收数据时。假设在超时时间后还不能发送或接收数据,则本次网络通信失败
charset: 字符集
http.tracker_http_port :.tracker的http端口
tracker_server: tracker服务器IP和端口设置
步骤三:在resources文件夹下创建application.yml
spring:
servlet:
multipart:
max-file-size: 10MB
max-request-size: 10MB
server:
port: 9008
eureka:
client:
service-url:
defaultZone: http://127.0.0.1:6868/eureka
instance:
prefer-ip-address: true
feign:
hystrix:
enabled: true
max-file-size是单个文件大小,max-request-size是设置总上传的数据大小
步骤四:创建com.changgou.file包,创建启动类FileApplication
@SpringBootApplication @EnableEurekaClient public class FileApplication { public static void main(String[] args) { SpringApplication.run(FileApplication.class); } }
三、实现文件上传
(1)文件信息封装:
文件上传一般都有文件的名字、文件的内容、文件的扩展名、文件的md5值、文件的作者等相关属性,我们可以创建一个对象封装这些属性,代码如下:
创建com.shangcheng.file.pojo.FastDFSFile
public class FastDFSFile { //文件名字 private String name; //文件内容 private byte[] content; //文件扩展名 private String ext; //文件MD5摘要值 private String md5; //文件创建作者 private String author; public FastDFSFile(String name, byte[] content, String ext, String height, String width, String author) { super(); this.name = name; this.content = content; this.ext = ext; this.author = author; } public FastDFSFile(String name, byte[] content, String ext) { super(); this.name = name; this.content = content; this.ext = ext; } // getter and setter ... }
(2)文件操作:
创建FastDFSClient类,放在com.shangcheng.file.util下在该类中实现FastDFS信息获取以及文件的相关操作,
代码如下:
public class FastDFSClient { private static org.slf4j.Logger logger = LoggerFactory.getLogger(FastDFSClient.class); /*** * 初始化加载FastDFS的TrackerServer配置 */ static { try { String filePath = new ClassPathResource("fdfs_client.conf").getFile().getAbsolutePath(); ClientGlobal.init(filePath); } catch (Exception e) { logger.error("FastDFS Client Init Fail!",e); } } /*** * 文件上传 * @param file * @return */ public static String[] upload(FastDFSFile file) { //获取文件的作者 NameValuePair[] meta_list = new NameValuePair[1]; meta_list[0] = new NameValuePair("author", file.getAuthor()); //接收返回数据 String[] uploadResults = null; StorageClient storageClient=null; try { //创建StorageClient客户端对象 storageClient = getTrackerClient(); /*** * 文件上传 * 1)文件字节数组 * 2)文件扩展名 * 3)文件作者 */ uploadResults = storageClient.upload_file(file.getContent(), file.getExt(), meta_list); } catch (Exception e) { logger.error("Exception when uploadind the file:" + file.getName(), e); } if (uploadResults == null && storageClient!=null) { logger.error("upload file fail, error code:" + storageClient.getErrorCode()); } //获取组名 String groupName = uploadResults[0]; //获取文件存储路径 String remoteFileName = uploadResults[1]; return uploadResults; } /*** * 获取文件信息 * @param groupName:组名 * @param remoteFileName:文件存储完整名 * @return */ public static FileInfo getFile(String groupName, String remoteFileName) { try { StorageClient storageClient = getTrackerClient(); return storageClient.get_file_info(groupName, remoteFileName); } catch (Exception e) { logger.error("Exception: Get File from Fast DFS failed", e); } return null; } /*** * 文件下载 * @param groupName * @param remoteFileName * @return */ public static InputStream downFile(String groupName, String remoteFileName) { try { //创建StorageClient StorageClient storageClient = getTrackerClient(); //下载文件 byte[] fileByte = storageClient.download_file(groupName, remoteFileName); InputStream ins = new ByteArrayInputStream(fileByte); return ins; } catch (Exception e) { logger.error("Exception: Get File from Fast DFS failed", e); } return null; } /*** * 文件删除 * @param groupName * @param remoteFileName * @throws Exception */ public static void deleteFile(String groupName, String remoteFileName) throws Exception { //创建StorageClient StorageClient storageClient = getTrackerClient(); //删除文件 int i = storageClient.delete_file(groupName, remoteFileName); } /*** * 获取Storage组 * @param groupName * @return * @throws IOException */ public static StorageServer[] getStoreStorages(String groupName) throws IOException { //创建TrackerClient TrackerClient trackerClient = new TrackerClient(); //获取TrackerServer TrackerServer trackerServer = trackerClient.getConnection(); //获取Storage组 return trackerClient.getStoreStorages(trackerServer, groupName); } /*** * 获取Storage信息,IP和端口 * @param groupName * @param remoteFileName * @return * @throws IOException */ public static ServerInfo[] getFetchStorages(String groupName, String remoteFileName) throws IOException { TrackerClient trackerClient = new TrackerClient(); TrackerServer trackerServer = trackerClient.getConnection(); return trackerClient.getFetchStorages(trackerServer, groupName, remoteFileName); } /*** * 获取Tracker服务地址 * @return * @throws IOException */ public static String getTrackerUrl() throws IOException { return "http://"+getTrackerServer().getInetSocketAddress().getHostString()+":"+ClientGlobal.getG_tracker_http_port()+"/"; } /*** * 获取Storage客户端 * @return * @throws IOException */ private static StorageClient getTrackerClient() throws IOException { TrackerServer trackerServer = getTrackerServer(); StorageClient storageClient = new StorageClient(trackerServer, null); return storageClient; } /*** * 获取Tracker * @return * @throws IOException */ private static TrackerServer getTrackerServer() throws IOException { TrackerClient trackerClient = new TrackerClient(); TrackerServer trackerServer = trackerClient.getConnection(); return trackerServer; } }
(3)文件上传:
创建一个FileController,在该控制器中实现文件上传操作,代码如下:
@RestController @RequestMapping("/file") public class FileController { @PostMapping("/upload") public Result uploadFile(MultipartFile file){ try{ //判断文件是否存在 if (file == null){ throw new RuntimeException("文件不存在"); } //获取文件的完整名称 String originalFilename = file.getOriginalFilename(); if (StringUtils.isEmpty(originalFilename)){ throw new RuntimeException("文件不存在"); } //获取文件的扩展名称 abc.jpg jpg String extName = originalFilename.substring(originalFilename.lastIndexOf(".") + 1); //获取文件内容 byte[] content = file.getBytes(); //创建文件上传的封装实体类 FastDFSFile fastDFSFile = new FastDFSFile(originalFilename,content,extName); //基于工具类进行文件上传,并接受返回参数 String[] String[] uploadResult = FastDFSClient.upload(fastDFSFile); //封装返回结果 String url = FastDFSClient.getTrackerUrl()+uploadResult[0]+"/"+uploadResult[1]; return new Result(true,StatusCode.OK,"文件上传成功",url); }catch (Exception e){ e.printStackTrace(); } return new Result(false, StatusCode.ERROR,"文件上传失败"); } }
四、使用Postman测试文件上传
使用Postman测试文件上传 步骤:
1、选择post请求方式,输入请求地址 http://localhost:9008/upload
2、填写Headers
Key:Content-Type
Value:multipart/form-data
3、填写body
选择form-data 然后选择文件file 点击添加文件,最后发送即可。