Java实现整合文件上传到FastDFS的方法详细

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

    /**
     * 文件上传
     * @param file MultipartFile类型
     * @return url
     */
    @Override
    public String fileUpload(MultipartFile file) throws Exception {
        try {
            return upload(file);
        } catch (Exception e) {
            e.printStackTrace();
        }
        throw new Exception();
    }

    /**
     * 文件上传
     * @param urlStr url地址
     * @return url
     */
    @Override
    public String fileUpload(String urlStr) throws Exception {
        try {
            //把地址转换成URL对象
            URL url = new URL(urlStr);
            //创建http链接
            HttpURLConnection conn = (HttpURLConnection)url.openConnection();
            //设置超时间为3秒
            conn.setConnectTimeout(3*1000);
            //防止屏蔽程序抓取而返回403错误
            conn.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/61.0.3163.100 Safari/537.36)");
            //得到输入流
            InputStream inputStream = conn.getInputStream();
            //截取链接中的文件名
            String fileName= urlStr.substring(urlStr.lastIndexOf("/")+1);
            MultipartFile multipartFile = new MockMultipartFile(fileName,fileName, ContentType.APPLICATION_OCTET_STREAM.toString(), inputStream);
            //返回结果集
            return upload(multipartFile);
        } catch (Exception e) {
            e.printStackTrace();
        }
        throw new Exception();
 
    }

package com.tfjybj.arpro.crawl.service.impl;
 
import com.github.tobato.fastdfs.domain.fdfs.StorePath;
import com.github.tobato.fastdfs.service.FastFileStorageClient;
import com.tfjybj.arpro.crawl.service.FileUploadService;
import com.tfjybj.arpro.crawl.util.CommonConfigurationUtil;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.apache.http.entity.ContentType;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.mock.web.MockMultipartFile;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;
 
import java.io.*;
import java.net.HttpURLConnection;
import java.net.URL;
 
/**
 * 文件上传业务类
 *
 * @author Promsing(张有博)
 * @version 1.0.0
 * @since 2022/2/25 - 20:01
 */
@Service
@Slf4j
public class FileUploadServiceImpl implements FileUploadService {
 
    @Autowired
    private FastFileStorageClient fastFileStorageClient;
 
 
    // 获取配置文件中的配置IP地址
    @Value("${fdfs.realIp}")
    private String realIp;
    // 获取配置文件中的配置分组
    @Value("${fdfs.groupName}")
    private String group;
 
 
 
    /**
     * 文件上传
     * @param file MultipartFile类型
     * @return url
     */
    @Override
    public String fileUpload(MultipartFile file) throws Exception {
        try {
            return upload(file);
        } catch (Exception e) {
            e.printStackTrace();
        }
        throw new Exception();
    }
 
    /**
     * 文件上传
     * @param urlStr url地址
     * @return url
     */
    @Override
    public String fileUpload(String urlStr) throws Exception {
        try {
            //把地址转换成URL对象
            URL url = new URL(urlStr);
            //创建http链接
            HttpURLConnection conn = (HttpURLConnection)url.openConnection();
            //设置超时间为3秒
            conn.setConnectTimeout(3*1000);
            //防止屏蔽程序抓取而返回403错误
            conn.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/61.0.3163.100 Safari/537.36)");
            //得到输入流
            InputStream inputStream = conn.getInputStream();
            //截取链接中的文件名
            String fileName= urlStr.substring(urlStr.lastIndexOf("/")+1);
            MultipartFile multipartFile = new MockMultipartFile(fileName,fileName, ContentType.APPLICATION_OCTET_STREAM.toString(), inputStream);
            //返回结果集
            return upload(multipartFile);
        } catch (Exception e) {
            e.printStackTrace();
        }
        throw new Exception();
 
    }
 
    /**
     * 文件上传
     * @param file 需要上传的文件
     * @return 上传后的文件地址
     */
    public String upload(MultipartFile file) {
        try {
            // 1.文件信息校验
            if (file.isEmpty()) {
                log.debug("需要上传的文件信息不通过");
                return null;
            }
            // 2.保存图片到fastDFS服务器
            //2.1 获取文件后缀名
            String extension = StringUtils.substringAfterLast(file.getOriginalFilename(), ".");
            //2.2 保存
            StorePath storePath = fastFileStorageClient.uploadFile(group, file.getInputStream(), file.getSize(), extension);
            // 获取附件的完整地址
            String Path = CommonConfigurationUtil.HTTP + CommonConfigurationUtil.ECOLON + CommonConfigurationUtil.DOUBLE_SLASH + realIp + CommonConfigurationUtil.SINGLE_SLASH + storePath.getFullPath();
            log.info("文件上传成功，文件地址:" + Path);
            return Path;
        } catch (Exception ex) {
            ex.printStackTrace();
            return null;
        }
    }
 
}

# 文件服务器基础配置
fdfs:
  groupName: ar
  so-timeout: 1500
  connect-timeout: 600
  tracker-list: d-fastdfs.xxxx.com:22122
  replace-ip:
    source: d-fastdfs.xxxx.com
    dest: d-fastdfs.xxxx.com
  realIp: d-fastdfs.xxxx.com