SpringBoot集成FastDFS依赖实现文件上传的示例

    net.oschina.zcx7878
    fastdfs-client-java
    1.27.0.0

    com.github.tobato
    fastdfs-client
    1.27.2

@Configuration
@Import(FdfsClientConfig.class)
@EnableMBeanExport(registration = RegistrationPolicy.IGNORE_EXISTING)
public class ComponetImport {
    // 导入依赖组件
}

server:
  port: 8080

ip: 10.211.55.4 # 根据自己FastDFS服务器修改

fdfs:
  so-timeout: 1501
  connect-timeout: 601
  thumb-image:             #缩略图生成参数
    width: 150
    height: 150
  tracker-list:            #TrackerList参数,支持多个
    - 10.211.55.4:22122
  web-server-url: http://${ip}:8888/

import com.github.tobato.fastdfs.domain.conn.FdfsWebServer;
import com.github.tobato.fastdfs.domain.fdfs.StorePath;
import com.github.tobato.fastdfs.domain.proto.storage.DownloadByteArray;
import com.github.tobato.fastdfs.exception.FdfsUnsupportStorePathException;
import com.github.tobato.fastdfs.service.FastFileStorageClient;
import org.apache.commons.io.FilenameUtils;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.multipart.MultipartFile;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.nio.charset.Charset;

@Component
public class FastDFSClient {

    @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;
    }

    /**
     * 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.parseFromUrl(fileUrl);
            storageClient.deleteFile(storePath.getGroup(), storePath.getPath());
        } catch (FdfsUnsupportStorePathException e) {
            System.out.println(e.getMessage());
            /** TODO 只是测试，所以未使用，logger，正式环境请修改打印方式 **/
        }
    }
    /**
     * 下载文件
     *
     * @param fileUrl 文件URL
     * @return 文件字节
     * @throws IOException
     */
    public byte[] downloadFile(String fileUrl) throws IOException {
        String group = fileUrl.substring(0, fileUrl.indexOf("/"));
        String path = fileUrl.substring(fileUrl.indexOf("/") + 1);
        DownloadByteArray downloadByteArray = new DownloadByteArray();
        byte[] bytes = storageClient.downloadFile(group, path, downloadByteArray);
        return bytes;
    }

}

@RestController
@RequestMapping("/file")
public class FileUploadController {

    @Autowired
    private FastDFSClient fastDFSClient;

    /**
     * 上传
     * @param file
     * @return
     * @throws IOException
     */
    @RequestMapping("/upload")
    public String uploadFile(MultipartFile file) throws IOException {
        return fastDFSClient.uploadFile(file);
    }

}

@RestController
@RequestMapping("/file")
public class FileUploadController {

    @Autowired
    private FastDFSClient fastDFSClient;

    /**
     * 下载
     * @param fileUrl
     * @param response
     * @throws IOException
     */
    @RequestMapping("/download")
    public void downloadFile(String fileUrl, HttpServletResponse response) throws IOException {
        byte[] bytes = fastDFSClient.downloadFile(fileUrl);
        /** TODO 这里只是为了整合fastdfs，所以写死了文件格式。需要在上传的时候保存文件名。下载的时候使用对应的格式 **/
        response.setHeader("Content-disposition", "attachment;filename=" + URLEncoder.encode("sb.xlsx", "UTF-8"));
        response.setCharacterEncoding("UTF-8");
        ServletOutputStream outputStream = null;
        try {
            outputStream = response.getOutputStream();
            outputStream.write(bytes);
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                outputStream.flush();
                outputStream.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

}