spring boot整合fastdfs

Spring Boot可以很方便地与FastDFS进行整合，实现文件上传和下载的功能。

首先，需要在pom.xml文件中添加FastDFS的依赖：

<dependency>
    <groupId>com.github.tobato</groupId>
    <artifactId>fastdfs-client</artifactId>
    <version>1.27.2</version>
</dependency>

然后，在application.properties文件中配置FastDFS的连接信息：

fdfs.tracker-list=192.168.1.100:22122,192.168.1.101:22122

接着，创建一个FastDFS的配置类：

@Configuration
public class FastDFSConfig {

    @Value("${fdfs.tracker-list}")
    private String trackerList;

    @Bean
    public DefaultTrackerClient defaultTrackerClient() {
        return new DefaultTrackerClient();
    }

    @Bean
    public TrackerClient trackerClient() {
        return new TrackerClient();
    }

    @Bean
    public ConnectionPool connectionPool() {
        ConnectionPool connectionPool = new ConnectionPool();
        connectionPool.setTrackerList(trackerList);
        return connectionPool;
    }

    @Bean
    public FastFileStorageClient fastFileStorageClient() {
        return new DefaultFastFileStorageClient();
    }

}

最后，在Controller中实现文件上传和下载的功能：

@RestController
public class FileController {

    @Autowired
    private FastFileStorageClient fastFileStorageClient;

    @PostMapping("/upload")
    public String upload(MultipartFile file) throws IOException {
        StorePath storePath = fastFileStorageClient.uploadFile(file.getInputStream(), file.getSize(), FilenameUtils.getExtension(file.getOriginalFilename()), null);
        return storePath.getFullPath();
    }

    @GetMapping("/download")
    public void download(String filePath, HttpServletResponse response) throws IOException {
        byte[] bytes = fastFileStorageClient.downloadFile(filePath.substring(0, filePath.indexOf("/")), filePath.substring(filePath.indexOf("/") + 1));
        response.getOutputStream().write(bytes);
    }

}

这样，就可以实现文件上传和下载的功能了。