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10-21Spring Boot 整合 FastDFS 客户端

一、前言

前两篇整体上介绍了通过 Nginx 和 FastDFS 的整合来实现文件服务器。但是，在实际开发中对图片或文件的操作都是通过应用程序来完成的，因此，本篇将介绍 Spring Boot 整合 FastDFS 客户端来实现对图片/文件服务器的访问。

如果有不了解 FastDFS 的读者可以先浏览《FastDFS 环境搭建》和《Nginx 整合 FastDFS 实现文件服务器》来普及内容，或是另行查阅网上相关资料。

二、整合编码

# 2.1 添加依赖

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<optional>true</optional>
<scope>true</scope>
</dependency>
<dependency>
<groupId>com.github.tobato</groupId>
<artifactId>fastdfs-client</artifactId>
<version>1.26.3</version>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.6</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>

上边的 fastdfs-client 是并非 FastDFS Client 原作者编写的整合包，具体详情可以访问 https://github.com/tobato/FastDFS_Client 。

# 2.2 application.properties

server.port=8080
# fastDFS 配置
fdfs.so-timeout=1501
fdfs.connect-timeout=601
fdfs.thumb-image.width=150
fdfs.thumb-image.height=150
fdfs.web-server-url=192.168.10.110/
fdfs.tracker-list[0]=192.168.10.110:22122

# 2.3 后端代码

加载 FastDFS 配置类：

@Configuration
@Import(FdfsClientConfig.class)
// 解决jmx重复注册bean的问题
@EnableMBeanExport(registration = RegistrationPolicy.IGNORE_EXISTING)
public class ComponetImport {
// 导入依赖组件

FastDFS 工具类：

@Component
public class FastDFSClient {
private final Logger logger = LoggerFactory.getLogger(FastDFSClient.class);
@Autowired
private FastFileStorageClient storageClient;
@Autowired
private FdfsWebServer fdfsWebServer;
/**
* 上传文件
* @param file 文件对象
* @return 文件访问地址
* @throws IOException
*/
public String uploadFile(MultipartFile file) throws IOException {
StorePath storePath = storageClient.uploadFile(file.getInputStream(),file.getSize(), FilenameUtils.getExtension(file.getOriginalFilename()),null);
return getResAccessUrl(storePath);
/**
* 上传文件
* @param file 文件对象
* @return 文件访问地址
* @throws IOException
*/
public String uploadFile(File file) throws IOException {
FileInputStream inputStream = new FileInputStream (file);
StorePath storePath = storageClient.uploadFile(inputStream,file.length(), FilenameUtils.getExtension(file.getName()),null);
return getResAccessUrl(storePath);
/**
* 将一段字符串生成一个文件上传
* @param content 文件内容
* @param fileExtension
* @return
*/
public String uploadFile(String content, String fileExtension) {
byte[] buff = content.getBytes(Charset.forName("UTF-8"));
ByteArrayInputStream stream = new ByteArrayInputStream(buff);
StorePath storePath = storageClient.uploadFile(stream,buff.length, fileExtension,null);
return getResAccessUrl(storePath);
// 封装图片完整URL地址
private String getResAccessUrl(StorePath storePath) {
String fileUrl = fdfsWebServer.getWebServerUrl() + storePath.getFullPath();
return fileUrl;
/**
* 下载文件
* @param fileUrl 文件url
* @return
*/
public byte[] download(String fileUrl) {
String group = fileUrl.substring(0, fileUrl.indexOf("/"));
String path = fileUrl.substring(fileUrl.indexOf("/") + 1);
byte[] bytes = storageClient.downloadFile(group, path, new DownloadByteArray());
return bytes;
/**
* 删除文件
* @param fileUrl 文件访问地址
* @return
*/
public void deleteFile(String fileUrl) {
if (StringUtils.isEmpty(fileUrl)) {
return;
try {
StorePath storePath = StorePath.praseFromUrl(fileUrl);
storageClient.deleteFile(storePath.getGroup(), storePath.getPath());
} catch (FdfsUnsupportStorePathException e) {
logger.warn(e.getMessage());

controller 类：

@RestController
@RequestMapping("/fdfs")
public class FastDFSController {
@Autowired
private FastDFSClient fdfsClient;
/**
* 文件上传
* @param file
* @return
* @throws Exception
*/
@RequestMapping("/upload")
public Map<String,Object> upload(MultipartFile file) throws Exception{
String url = fdfsClient.uploadFile(file);
Map<String,Object> result = new HashMap<>();
result.put("code", 200);
result.put("msg", "上传成功");
result.put("url", url);
return result;
/**
* 文件下载
* @param fileUrl url 开头从组名开始
* @param response
* @throws Exception
*/
@RequestMapping("/download")
public void download(String fileUrl, HttpServletResponse response) throws Exception{
byte[] data = fdfsClient.download(fileUrl);
response.setCharacterEncoding("UTF-8");
response.setHeader("Content-disposition", "attachment;filename=" + URLEncoder.encode("test.jpg", "UTF-8"));
// 写出
ServletOutputStream outputStream = response.getOutputStream();
IOUtils.write(data, outputStream);