1、pom依赖

com.github.tobato fastdfs-client 1.26.6

2、application.properties

server.port=8082
#超时时长
fdfs.so-timeout=1500
#连接tracker服务器超时时长
fdfs.connect-timeout=600
#缩略图
fdfs.thumb-image.height=150
fdfs.thumb-image.width=150
#tracker服务配置地址列表，替换成自己服务的IP地址，支持多个
fdfs.tracker-list=192.168.206.173:22122
#文件上传配置
spring.servlet.multipart.enabled=true
spring.servlet.multipart.max-file-size=10MB
spring.servlet.multipart.max-request-size=20MB

3、工具类

@Component
public class FastdfsUtils
{
public static final String DEFAULT_CHARSET = "UTF-8";

@Autowired  
private FastFileStorageClient fastFileStorageClient;

/\*\*  
 \* 上传  
 \*  
 \* @param file  
 \* @return  
 \* @throws IOException  
 \*/  
public StorePath upload(MultipartFile file)  
    throws IOException  
{  
    // 设置文件信息  
    Set<MetaData> mataData = new HashSet<>();  
    mataData.add(new MetaData("author", "fastdfs"));  
    mataData.add(new MetaData("description", file.getOriginalFilename()));  
    // 上传  
    StorePath storePath = fastFileStorageClient.uploadFile(  
        file.getInputStream(), file.getSize(),  
        FilenameUtils.getExtension(file.getOriginalFilename()),  
        null);  
    return storePath;  
}

/\*\*  
 \* 删除  
 \*  
 \* @param path 例如： group1/M00/00/00/wKjOrWD45PKAY4xmAFLQaGXPnu0735.jpg  
 \*/  
public void delete(String path)  
{  
    fastFileStorageClient.deleteFile(path);  
}

/\*\*  
 \* 删除  
 \*  
 \* @param group 例如： group1  
 \* @param path  例如： M00/00/00/wKjOrWD45PKAY4xmAFLQaGXPnu0735.jpg  
 \*/  
public void delete(String group, String path)  
{  
    fastFileStorageClient.deleteFile(group, path);  
}

/\*\*  
 \* 文件下载  
 \*  
 \* @param path     文件路径，例如：group1/M00/00/00/wKjOrWD40JiAQNKLABO5RCqSdcQ975.jpg  
 \* @param filename 下载的文件命名  
 \* @return  
 \*/  
public void download(String path, String filename, HttpServletResponse response)  
    throws IOException  
{  
    // 获取文件  
    StorePath storePath = StorePath.parseFromUrl(path);  
    //如果名字是空的 下载文件名以存储的为准  
    if (StringUtils.isBlank(filename))  
    {  
        filename = FilenameUtils.getName(storePath.getPath());  
    }  
    else  
    {  
        filename = filename + storePath.getPath().substring(storePath.getPath().lastIndexOf("."));  
    }  
    byte\[\] bytes =  
        fastFileStorageClient.downloadFile(storePath.getGroup(), storePath.getPath(), new DownloadByteArray());  
    response.reset();  
    response.setContentType("applicatoin/octet-stream");  
    response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(filename, "UTF-8"));  
    ServletOutputStream out = response.getOutputStream();  
    out.write(bytes);  
    out.close();  
}  

}

4、controller层代码

@RestController
public class FileController
{
private static final Logger LOGGER = LoggerFactory.getLogger(FileController.class);

@Resource  
private FastdfsUtils fastdfsUtils;

@PostMapping("uploadFile")  
private StorePath uploadFile(MultipartFile file)  
{  
    StorePath storePath = null;  
    try  
    {  
        storePath = fastdfsUtils.upload(file);  
    }  
    catch (Exception e)  
    {  
        e.printStackTrace();  
        LOGGER.info("服务异常");  
    }  
    return storePath;  
}

@PostMapping("deleteByPath")  
private String deleteByPath(String path)  
{  
    try  
    {  
        fastdfsUtils.delete(path);  
    }  
    catch (Exception e)  
    {  
        e.printStackTrace();  
        LOGGER.info("删除异常");  
    }  
    return "success";  
}

@GetMapping("downloadFile")  
private void downloadFile(String path, String name, HttpServletResponse response)  
{  
    try  
    {  
        fastdfsUtils.download(path, name, response);  
    }  
    catch (Exception e)  
    {  
        e.printStackTrace();  
        LOGGER.info("下载异常");  
    }  
}  

}