1、存储服务定时向跟踪服务上传状态信息；
2、客户端发起请求；
3、跟踪器同步存储器状态，返回存储服务端口和IP;
4、客户端执行文件操作（上传，下载）等。

1)、配置FastDFS执行环境
2)、文件上传配置
3)、整合Swagger2测试接口

<!-- FastDFS依赖 -->
<dependency>
    <groupId>com.github.tobato</groupId>
    <artifactId>fastdfs-client</artifactId>
    <version>1.26.5</version>
</dependency>
<!-- Swagger2 核心依赖 -->
<dependency>
    <groupId>io.springfox</groupId>
    <artifactId>springfox-swagger2</artifactId>
    <version>2.6.1</version>
</dependency>
<dependency>
    <groupId>io.springfox</groupId>
    <artifactId>springfox-swagger-ui</artifactId>
    <version>2.6.1</version>
</dependency>

fdfs:
  # 链接超时
  connect-timeout: 60
  # 读取时间
  so-timeout: 60
  # 生成缩略图参数
  thumb-image:
    width: 150
    height: 150
  tracker-list: 192.168.72.130:22122

@Configuration
@Import(FdfsClientConfig.class)
// Jmx重复注册bean的问题
@EnableMBeanExport(registration = RegistrationPolicy.IGNORE_EXISTING)
public class DfsConfig {
}

@Component
public class FileDfsUtil {
    private static final Logger LOGGER = LoggerFactory.getLogger(FileDfsUtil.class);
    @Resource
    private FastFileStorageClient storageClient ;
    /**
     * 上传文件
     */
    public String upload(MultipartFile multipartFile) throws Exception{
        String originalFilename = multipartFile.getOriginalFilename().
                                  substring(multipartFile.getOriginalFilename().
                                  lastIndexOf(".") + 1);
        StorePath storePath = this.storageClient.uploadImageAndCrtThumbImage(
                              multipartFile.getInputStream(),
                              multipartFile.getSize(),originalFilename , null);
        return storePath.getFullPath() ;
    }
    /**
     * 删除文件
     */
    public void deleteFile(String fileUrl) {
        if (StringUtils.isEmpty(fileUrl)) {
            LOGGER.info("fileUrl == >>文件路径为空...");
            return;
        }
        try {
            StorePath storePath = StorePath.parseFromUrl(fileUrl);
            storageClient.deleteFile(storePath.getGroup(), storePath.getPath());
        } catch (Exception e) {
            LOGGER.info(e.getMessage());
        }
    }
}

spring:
  application:
    name: ware-fast-dfs
  servlet:
    multipart:
      enabled: true
      max-file-size: 10MB
      max-request-size: 20MB

@Configuration
public class SwaggerConfig {
    @Bean
    public Docket createRestApi() {
        return new Docket(DocumentationType.SWAGGER_2)
                .apiInfo(apiInfo())
                .select()
                .apis(RequestHandlerSelectors.basePackage("com.fast.dfs"))
                .paths(PathSelectors.any())
                .build();
    }
    private ApiInfo apiInfo() {
        return new ApiInfoBuilder()
                .title("SpringBoot利用Swagger构建API文档")
                .description("使用RestFul风格, 创建人：知了一笑")
                .termsOfServiceUrl("https://github.com/cicadasmile")
                .version("version 1.0")
                .build();
    }
}

@EnableSwagger2

@RestController
public class FileController {
    @Resource
    private FileDfsUtil fileDfsUtil ;
    /**
     * 文件上传
     */
    @ApiOperation(value="上传文件", notes="测试FastDFS文件上传")
    @RequestMapping(value = "/uploadFile",headers="content-type=multipart/form-data", method = RequestMethod.POST)
    public ResponseEntity<String> uploadFile (@RequestParam("file") MultipartFile file){
        String result ;
        try{
            String path = fileDfsUtil.upload(file) ;
            if (!StringUtils.isEmpty(path)){
                result = path ;
            } else {
                result = "上传失败" ;
            }
        } catch (Exception e){
            e.printStackTrace() ;
            result = "服务异常" ;
        }
        return ResponseEntity.ok(result);
    }
    /**
     * 文件删除
     */
    @RequestMapping(value = "/deleteByPath", method = RequestMethod.GET)
    public ResponseEntity<String> deleteByPath (){
        String filePathName = "group1/M00/00/00/wKhIgl0n4AKABxQEABhlMYw_3Lo825.png" ;
        fileDfsUtil.deleteFile(filePathName);
        return ResponseEntity.ok("SUCCESS") ;
    }
}

1、访问http://localhost:7010/swagger-ui.html测试界面
2、调用文件上传接口，拿到文件在FastDFS服务的路径
3、浏览器访问：http://192.168.72.130/group1/M00/00/00/wKhIgl0n4AKABxQEABhlMYw_3Lo825.png
4、调用删除接口，删除服务器上图片
5、清空浏览器缓存，再次访问图片Url,回返回404