前言

本节内容我们主要介绍一下如何在springboot项目中集成fastdfs组件，实现文件的上传与下载。关于fastdfs服务中间键的安装过程，本节内容不做介绍。fastdfs是一个轻量级的分布式文件系统，也是我们文件存储中常常使用的组件之一，主要包括文件存储、文件同步、文件访问，实现了文件存储和负载均衡的问题。

正文

①引入fastdfs客户端的maven依赖

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

 ②在application.yml配置fastdfs的属性参数值

fdfs:so-timeout: 1501 # 超时时间connect-timeout: 601 # 连接超时时间tracker-list: # tracker地址：你的虚拟机服务器地址+端口（默认是22122）- 125.27.107.218:22122

 ③引入fastdfs客户端组件，交由spring管理

package com.ht.atp.plat.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 FastDfsConfig {}

 ④创建springboot文件上传与下载的控制层接口FdfsRecordController.class

package com.ht.atp.plat.controller;import com.ht.atp.plat.common.Result;
import com.ht.atp.plat.service.FdfsRecordService;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import io.swagger.annotations.ApiParam;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;@Api(tags = {"文件管理"})
@RestController
@RequestMapping("/v1/fdfs/record")
public class FdfsRecordController {@Autowiredprivate FdfsRecordService fdfsRecordService;@ApiOperation(value = "文件上传")@PostMapping(value = "uploadFile")public Result<String> uploadFile(@ApiParam(name = "file", value = "上传的文件")@RequestParam(value = "file") MultipartFile file) {String url = fdfsRecordService.uploadFile(file);return Result.success(url);}@ApiOperation(value = "文件下载")@GetMapping(value = "downloadFile")public Result<String> downloadFile(@ApiParam(name = "url", value = "下载地址")@RequestParam(value = "url") String url) {String data = fdfsRecordService.downloadFile(url);return Result.success(data);}}

 ⑤创建springboot文件上传与下载的业务接口层FdfsRecordService.class

package com.ht.atp.plat.service;import com.baomidou.mybatisplus.extension.service.IService;
import com.ht.atp.plat.entity.FdfsRecord;
import org.springframework.web.multipart.MultipartFile;public interface FdfsRecordService extends IService<FdfsRecord> {/*** 上传文件** @param file* @return*/String uploadFile(MultipartFile file);/*** 文件下载* @param url* @return*/String downloadFile(String url);
}

  ⑥创建springboot文件上传与下载的业务接口实现层FdfsRecordServiceImpl.class

package com.ht.atp.plat.service.impl;import cn.hutool.core.codec.Base64;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.github.tobato.fastdfs.domain.fdfs.StorePath;
import com.github.tobato.fastdfs.domain.proto.storage.DownloadByteArray;
import com.github.tobato.fastdfs.service.FastFileStorageClient;
import com.ht.atp.plat.entity.FdfsRecord;
import com.ht.atp.plat.exception.BusinessException;
import com.ht.atp.plat.mapper.FdfsRecordMapper;
import com.ht.atp.plat.service.FdfsRecordService;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.time.LocalDateTime;@Service
public class FdfsRecordServiceImpl extends ServiceImpl<FdfsRecordMapper, FdfsRecord> implements FdfsRecordService {@Autowiredprivate FastFileStorageClient storageClient;@Overridepublic String uploadFile(MultipartFile file) {try {BufferedImage bufferedImage = ImageIO.read(file.getInputStream());if (bufferedImage == null) {throw new BusinessException("文件内容不合法，无法上传！");}String fileName = file.getOriginalFilename();String suffix = "";if (StringUtils.isNotEmpty(fileName)) {String[] splitFileName = fileName.split("\\.");if (splitFileName != null && splitFileName.length > 1) {suffix = splitFileName[splitFileName.length - 1];}}FdfsRecord fdfsRecord = new FdfsRecord();fdfsRecord.setModifyTime(LocalDateTime.now());fdfsRecord.setCreateTime(LocalDateTime.now());fdfsRecord.setSuffixName(suffix);fdfsRecord.setName(fileName);StorePath storePath = this.storageClient.uploadFile(file.getInputStream(), file.getSize(), suffix, null);fdfsRecord.setUrl(storePath.getFullPath());baseMapper.insert(fdfsRecord);return storePath.getFullPath();} catch (Exception e) {throw new BusinessException("文件上传服务异常，请稍后重试！");}}@Overridepublic String downloadFile(String url) {String group = url.substring(0, url.indexOf("/"));String path = url.substring(url.indexOf("/") + 1);DownloadByteArray byteArray = new DownloadByteArray();byte[] data = this.storageClient.downloadFile(group, path, byteArray);String encodeData = Base64.encode(data);return encodeData;}
}

⑦创建springboot文件资源信息存储的持久化层FdfsRecordMapper.class，实现文件资源信息的持久化存储

package com.ht.atp.plat.mapper;import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.ht.atp.plat.entity.FdfsRecord;public interface FdfsRecordMapper extends BaseMapper<FdfsRecord> {}

⑧创建springboot文件资源信息存储的持久化层FdfsRecordMapper.xml，实现文件资源信息的持久化存储

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.ht.atp.plat.mapper.FdfsRecordMapper"></mapper>

 ⑨创建springboot文件资源信息存储的实体类FdfsRecord.class

package com.ht.atp.plat.entity;import com.baomidou.mybatisplus.annotation.IdType;
import com.baomidou.mybatisplus.annotation.TableField;
import com.baomidou.mybatisplus.annotation.TableId;
import com.baomidou.mybatisplus.annotation.TableName;
import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
import lombok.Getter;
import lombok.Setter;import java.io.Serializable;
import java.time.LocalDateTime;@Getter
@Setter
@TableName("fdfs_record")
@ApiModel(value = "FdfsRecord对象", description = "")
public class FdfsRecord implements Serializable {private static final long serialVersionUID = 1L;@ApiModelProperty("主键ID")@TableId(value = "id", type = IdType.ASSIGN_ID)private String id;@ApiModelProperty("业务ID")@TableField("business_id")private String businessId;@ApiModelProperty("服务名称")@TableField("service_name")private String serviceName;@ApiModelProperty("文件名称")@TableField("name")private String name;@ApiModelProperty("文件地址")@TableField("url")private String url;@ApiModelProperty("后缀名称")@TableField("suffix_name")private String suffixName;@ApiModelProperty("创建时间")@TableField("create_time")private LocalDateTime createTime;@ApiModelProperty("创建人")@TableField("create_user")private String createUser;@ApiModelProperty("修改时间")@TableField("modify_time")private LocalDateTime modifyTime;@ApiModelProperty("修改人")@TableField("modify_user")private String modifyUser;}

⑩ 使用swagger测试文件上传功能

 ⑪使用swagger测试文件下载功能

结语

通过至此，关于springboot集成fastdfs上传与下载功能到这里就结束了，下期见。。。