我的服务器是centos7.3版本

安装fastdfs借鉴了这位大佬博客（感谢大佬），fastdfs具体介绍这里也有(亲测可用)：https://blog.csdn.net/yin_zh0522/article/details/81232041

我的服务器比较low没尝试集群，就弄个单机版玩玩

Springboot整合fastdfs

引入maven依赖

<dependency>
    <groupId>com.github.tobato</groupId>
    <artifactId>fastdfs-client</artifactId>
    <version>1.26.5</version>
</dependency>

配置yml文件

fdfs:
  so-timeout: 1501
  connect-timeout: 601
  thumb-image:             #缩略图生成参数
    width: 200
    height: 200
  tracker-list:            #TrackerList参数,支持多个
    - your ip:22122#(这个fastdfs默认就是这个22122，当然你改了不算)

配置类

package com.dimple.framework.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)
// 解决jmx重复注册bean的问题
@EnableMBeanExport(registration = RegistrationPolicy.IGNORE_EXISTING)
public class FastdfsConfig {
}

封装的工具类，具体的spring上传文件我就不再这里写了，很简单

package com.dimple.common.utils;

import com.github.tobato.fastdfs.domain.fdfs.StorePath;
import com.github.tobato.fastdfs.domain.fdfs.ThumbImageConfig;
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.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.multipart.MultipartFile;

@Component
public class FastdfsUtil {

    @Autowired
    private FastFileStorageClient storageClient;
    @Autowired
    private ThumbImageConfig thumbImageConfig;

    /**
     * 上传文件
     * @param file
     * @return
     * @throws Exception
     */
    public String upload(MultipartFile file) throws Exception {
        //文件名
        String fileName = file.getOriginalFilename().substring(file.getOriginalFilename().lastIndexOf(".") + 1);
        // 文件扩展名
        String ext = fileName.substring(fileName.lastIndexOf(".") + 1, fileName.length());
        StorePath storePath = this.storageClient.uploadImageAndCrtThumbImage(file.getInputStream(), file.getSize(), fileName, null);
        String path = storePath.getFullPath();
        return path;
    }

    /**
     * 下载文件
     * @param groupName 组名
     * @param path 文件路径
     * @return
     */
    public byte[] downloadFile(String groupName,String path) {
        try {
            byte[] bytes = storageClient.downloadFile(groupName, path, new DownloadByteArray());
            return bytes;
        } catch (FdfsUnsupportStorePathException e) {
            System.out.println(e.getMessage());
            return null;
        }
    }

    /**
     * 删除文件
     * @param fileUrl 文件访问地址
     */
    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());
        }
    }
}

我的测试代码 

@Test
public void upload() throws Exception {
    File file = new File("G:\\各种文件\\timg (1).jpg");
    FileInputStream fileInputStream = new FileInputStream(file);
    MultipartFile multipartFile = new MockMultipartFile(file.getName(), file.getName(),
            ContentType.APPLICATION_OCTET_STREAM.toString(), fileInputStream);
    String upload = fastdfsUtil.upload(multipartFile);
    System.out.println(upload);
}

@Test
public void delete() {
    fastdfsUtil.deleteFile("group1/M00/00/00/rBEyTV2wFDiAVzGMAAB1v-4JFg4070.jpg");
}

@Test
public void download() throws Exception {
    byte[] bytes = fastdfsUtil.downloadFile("group1", "M00/00/00/rBEyTV2wGb6ADkPSAAB1v-4JFg4102.jpg");
    InputStream ins = new ByteArrayInputStream(bytes);
    OutputStream outputStream = new FileOutputStream("G:\\各种文件\\timg (10).jpg");

    byte[] bs = new byte[1024];
    int count = 0;

    while ((count = ins.read(bs, 0, bs.length)) != -1) {
        outputStream.write(bs, 0, count);
    }
    ins.close();
    outputStream.flush();
    outputStream.close();
}