springboot整合fastdfs实现上传和下载

FastDFS_Client源码：https://github.com/tobato/FastDFS_Client

引入fastdfs

<dependency>
    <groupId>com.github.tobato</groupId>
    <artifactId>fastdfs-client</artifactId>
    <version>1.25.2-RELEASE</version>
</dependency>

application-dev.yml

fdfs:
  # 读取时间
  soTimeout: 1501
  # 连接超时时间
  connectTimeout: 691
  # 编码默认UTF-8，charset属性不能自定义
  # charset: UTF-8
  # 缩略图
  thumbImage:
    # 宽
     150
    # 高
    height: 150
  # tracker列表
  trackerList:
    - fastDFS的IP:端口
    - fastDFS的IP:端口

引入fastdfs配置

package com.wang.sb.config;

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;


@Configuration
@Import(FdfsClientConfig.class)
@EnableMBeanExport(registration = RegistrationPolicy.IGNORE_EXISTING)
public class FdfsConfig {
}

上传和下载实现

package com.wang.sb.service;

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;

@Component
public class FastDFSClientWrapper {
    private final Logger logger = LoggerFactory.getLogger(FastDFSClientWrapper.class);
    @Autowired
    private FastFileStorageClient fastFileStorageClient;

    /**
     * 文件上传
     *
     * @param bytes     文件字节
     * @param fileSize  文件大小
     * @param extension 文件扩展名
     * @return fastDfs路径
     */
    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 = fastFileStorageClient.downloadFile(group, path, downloadByteArray);
        return bytes;
    }
}

web调用测试

package com.wang.sb.web;

import com.wang.sb.service.FastDFSClientWrapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.net.URLEncoder;

@RestController
@RequestMapping("/hello")
public class HelloController {
    @Autowired
    private FastDFSClientWrapper fastDFSClientWrapper;

    @RequestMapping("/upload")
    public String uploadFile(MultipartFile file) throws IOException {
        byte[] bytes = file.getBytes();
        String originalFileName = file.getOriginalFilename();
        String extension = originalFileName.substring(originalFileName.lastIndexOf(".") + 1);
        String fileName = file.getName();
        long fileSize = file.getSize();
        System.out.println(originalFileName + "==========" + fileName + "===========" + fileSize + "===============" + extension + "====" + bytes.length);
        return fastDFSClientWrapper.uploadFile(bytes, fileSize, extension);
    }

    @RequestMapping("/download")
    public void downloadFile(String fileUrl, HttpServletResponse response) throws IOException {
        byte[] bytes = fastDFSClientWrapper.downloadFile(fileUrl);
        // 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();
            }
        }
    }
}