pom.xml檔案新增配置：

<!-- fastdfs -->
<dependency>
    <groupId>com.github.tobato</groupId>
    <artifactId>fastdfs-client</artifactId>
    <version>1.26.2</version>
</dependency>

application.yml新增配置：

#fastdfs 配置
fdfs:
 so-timeout: 1500
 connect-timeout: 600
 thumb-image:
   width: 150
   height: 150
 tracker-list:
   - 10.3.10.173:22122
 

包含載入時間，連線時間，圖片長寬高等欄位。除了tracker-list:服務地址，其他的都不是必須的，其他具體配置這裡不做詳細解釋。

引入fastdfs配置

import com.github.tobato.fastdfs.FdfsClientConfig;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.EnableMBeanExport;
import org.springframework.context.annotation.Import;
import org.springframework.jmx.support.RegistrationPolicy;
 
/**
 *  引入fastdfs配置
 * Created huhu 1 on 2018/10/26.
 */
@Configuration
@Import(FdfsClientConfig.class)
@EnableMBeanExport(registration = RegistrationPolicy.IGNORE_EXISTING)
public class FdfsConfig {
 
}
 

FastDFS客戶端包裝類

import com.github.tobato.fastdfs.domain.StorePath;
import com.github.tobato.fastdfs.proto.storage.DownloadByteArray;
import com.github.tobato.fastdfs.service.FastFileStorageClient;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
 
import java.io.ByteArrayInputStream;
import java.io.IOException;
 
/**
 * FastDFS客戶端包裝類
 * Created by hu on 2018/10/26.
 */
@Component
public class FastDFSClientWrapper {
 
    private final Logger logger = LoggerFactory.getLogger(FastDFSClientWrapper.class);
 
    @Autowired
    private FastFileStorageClient fastFileStorageClient;
 
    /**
     * 檔案上傳
     * 最後返回fastDFS中的檔名稱;group1/M00/01/04/CgMKrVvS0geAQ0pzAACAAJxmBeM793.doc
     *
     * @param bytes     檔案位元組
     * @param fileSize  檔案大小
     * @param extension 副檔名
     * @return fastDfs路徑
     */
    public String uploadFile(byte[] bytes, long fileSize, String extension) {
        ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(bytes);
        StorePath storePath = fastFileStorageClient.uploadFile(byteArrayInputStream, fileSize, extension, null);
        System.out.println(storePath.getGroup() + "==" + storePath.getPath() + "======" + storePath.getFullPath());
        return storePath.getFullPath();
    }
 
    /**
     * 下載檔案
     *  返回檔案位元組流大小
     * @param fileUrl 檔案URL
     * @return 檔案位元組
     * @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 = fastFileStorageClient.downloadFile(group, path, downloadByteArray);
        return bytes;
    }
 
}
 

實現真正檔案上傳和下載

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;
 
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.net.URLEncoder;
 
/**
 * Created by 1 on 2018/10/26.
 */
@Service
public class DRFdfsUpAndDowServiceImpl implements DRFdfsUpAndDowService{
 
    @Autowired
    private FastDFSClientWrapper fastDFSClientWrapper;
 
    private final Logger logger = LoggerFactory.getLogger(DRFdfsUpAndDowServiceImpl.class);
 
    /**
     *  檔案上傳
     *  最後返回fastDFS中的檔名稱;group1/M00/01/04/CgMKrVvS0geAQ0pzAACAAJxmBeM793.doc
     * @param file 頁面提交時檔案
     * @return
     */
    public String uploadFile(MultipartFile file){
        byte[] bytes = new byte[0];
        try {
            bytes = file.getBytes();
        } catch (IOException e) {
            logger.error("獲取檔案錯誤");
            e.printStackTrace();
        }
        //獲取原始檔名稱
        String originalFileName = file.getOriginalFilename();
        //獲取檔案字尾--.doc
        String extension = originalFileName.substring(originalFileName.lastIndexOf(".") + 1);
        String fileName = file.getName();
        //獲取檔案大小
        long fileSize = file.getSize();
        System.out.println(originalFileName + "==" + fileName + "==" + fileSize + "==" + extension + "==" + bytes.length);
        return fastDFSClientWrapper.uploadFile(bytes, fileSize, extension);
    }
 
    /**
     *  檔案下載
     * @param fileUrl 當前物件檔名稱
     * @param response   HttpServletResponse 內建物件
     * @throws IOException
     */
    public void downloadFile(String fileUrl, HttpServletResponse response) throws IOException {
        byte[] bytes = fastDFSClientWrapper.downloadFile(fileUrl);
        // 這裡只是為了整合fastdfs，所以寫死了檔案格式。需要在上傳的時候儲存檔名。下載的時候使用對應的格式
        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();
            }
        }
    }
 
}