Java实现文件分片上传接口的示例代码

package com.youmejava.chun.util;

import lombok.Data;
import org.apache.tomcat.util.http.fileupload.FileUtils;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.channels.FileChannel;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;

/**
 * 文件工具
 */

@Data
public class FileUtil {
    private List<File> filelist;//文件列表
    private String strPath;//路径

    public FileUtil() {
    }

    public FileUtil(List<File> filelist, String strPath) {
        this.filelist = filelist;
        this.strPath = strPath;
        getFileList(this.strPath);
    }

    /**
     * 获取文件列表
     * @param strPath
     * @return
     */
    public List<File> getFileList(String strPath) {
        File dir = new File(strPath);
        File[] files = dir.listFiles(); // 该文件目录下文件全部放入数组
        if (files != null) {
            for (int i = 0; i < files.length; i++) {
                String fileName = files[i].getName();
                if (files[i].isDirectory()) { // 判断是文件还是文件夹
                    getFileList(files[i].getAbsolutePath()); // 获取文件绝对路径
                } else  { // 判断文件名
                    String strFileName = files[i].getAbsolutePath();
                    //                    System.out.println("---" + strFileName);
                    filelist.add(files[i]);
                }
            }

        }
        return filelist;
    }

    /**
     * 合并文件
     * @param from
     * @param to
     * @throws IOException
     */
    public static void mergeFile(String from, String to) throws IOException {
        File t = new File(to);
        FileInputStream in = null;
        FileChannel inChannel = null;
        System.out.println("t "+t);

        FileOutputStream out = new FileOutputStream(t,true);
        FileChannel outChannel = out.getChannel();

        File f = new File(from);
        System.out.println("f "+f.isDirectory());
        // 获取目录下的每一个文件名，再将每个文件一次写入目标文件
        if (f.isDirectory()) {
            List<File> list = getAllFileAndSort(from);
            System.out.println("sortlist  "+list);
            // 记录新文件最后一个数据的位置
            long start = 0;
            for (File file : list) {

                in = new FileInputStream(file);
                inChannel = in.getChannel();

                // 从inChannel中读取file.length()长度的数据，写入outChannel的start处
                outChannel.transferFrom(inChannel, start, file.length());
                start += file.length();
                in.close();
                inChannel.close();
            }
        }
        out.close();
        outChannel.close();
    }

    /**
     * 所有文件排序
     * @param dirPath 文件根目录路径
     * @return
     */
    public static List<File> getAllFileAndSort(String dirPath) {
        File dirFile = new File(dirPath);
        File[] listFiles = dirFile.listFiles();
        List<File> list = Arrays.asList(listFiles);
        Collections.sort(list, (o1, o2) -> {
            String _str=o1.getName().split("\\.")[0];
            String _num=_str.split("_")[1];
            String _str2=o2.getName().split("\\.")[0];
            String _num2=_str2.split("_")[1];
            return Integer.parseInt(_num) - Integer.parseInt(_num2);
        });
        return list;
    }

    /**
     * 删除文件夹
     * 删除文件夹需要把包含的文件及文件夹先删除，才能成功
     * https://blog.csdn.net/m0_57640408/article/details/120774050
     * @param directory 文件夹名
     * @return 删除成功返回true,失败返回false
     */
    public static boolean deleteDirectory(String directory) {
        // directory不以文件分隔符（/或\）结尾时，自动添加文件分隔符，不同系统下File.separator方法会自动添加相应的分隔符
        if (!directory.endsWith(File.separator)) {
            directory = directory + File.separator;
        }
        File directoryFile = new File(directory);
        // 判断directory对应的文件是否存在，或者是否是一个文件夹
        if (!directoryFile.exists() || !directoryFile.isDirectory()) {
            System.out.println("文件夹删除失败，文件夹不存在" + directory);
            return false;
        }
        boolean flag = true;
        // 删除文件夹下的所有文件和文件夹
        File[] files = directoryFile.listFiles();
        for (int i = 0; i < files.length; i++) {  // 循环删除所有的子文件及子文件夹
            // 删除子文件
            if (files[i].isFile()) {
                flag = deleteFile(files[i].getAbsolutePath());
                if (!flag) {
                    break;
                }
            } else {  // 删除子文件夹
                flag = deleteDirectory(files[i].getAbsolutePath());
                if (!flag) {
                    break;
                }
            }
        }

        if (!flag) {
            System.out.println("删除失败");
            return false;
        }
        // 最后删除当前文件夹
        if (directoryFile.delete()) {
            System.out.println("删除成功：" + directory);
            return true;
        } else {
            System.out.println("删除失败：" + directory);
            return false;
        }
    }

    /**
     * 删除文件
     *
     * @param fileName 文件名
     * @return 删除成功返回true,失败返回false
     */
    public static boolean deleteFile(String fileName) {
        File file = new File(fileName);
        if (file.isFile() && file.exists()) {
            file.delete();
            System.out.println("删除文件成功：" + fileName);
            return true;
        } else {
            System.out.println("删除文件失败：" + fileName);
            return false;
        }
    }

}

 package com.youmejava.chun.commoninterface;

import com.youmejava.chun.util.FileUtil;
import com.youmejava.chun.util.ResultVo;
import com.youmejava.chun.util.StringUtil;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiImplicitParam;
import io.swagger.annotations.ApiImplicitParams;
import io.swagger.annotations.ApiOperation;
import org.apache.shiro.authc.ExpiredCredentialsException;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.multipart.MultipartHttpServletRequest;

import javax.servlet.http.HttpServletRequest;
import java.io.*;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

@RestController
@RequestMapping("/api/apiSystem/upload")
@Api(value = "文件上传", tags = "文件上传")
public class UploadController {

    @Value("${filePath1}")
    private String filePath;

    @PostMapping("/register")
    @ApiOperation(value = "文件注册", notes = "文件注册")
    @ApiImplicitParams({@ApiImplicitParam(value = "哈希值", name = "hash", required = true, paramType = "body")})
    public ResultVo register(@RequestBody Map<String, Object> map) {
        System.out.println("hash: " + map.get("hash"));
        if (!StringUtil.isNotBlankAndNull(map.get("hash").toString())) {
            //            return ResultVo.failure("哈希值不可为空");
            throw new ExpiredCredentialsException("哈希值不可为空！");
        }
        String _filePath=filePath;
        if (!_filePath.endsWith("/")) {
            _filePath+="/";
        }
//        String _pathStr = "C:\\Users\\JH-rent\\Desktop\\java启动文件\\test" + "\\" + map.get("hash");
        String _pathStr=_filePath+map.get("hash");
        //创建不同的文件夹目录
        File file = new File(_pathStr);
        //判断文件夹是否存在
        if (!file.exists()) {
            //如果文件夹不存在，则创建新的的文件夹
            file.mkdirs();
        }
        File f = new File(_pathStr);

        // 检查目录是否已上传过文件，如果上传过，返回上传个数
        if (f.isDirectory()) {
            File dirFile = new File(_pathStr);
            File[] listFiles = dirFile.listFiles();
            List<File> list = Arrays.asList(listFiles);
            if (list == null&&list.size()>0) {
                Map<String, Object>map1=new HashMap<>();
                map1.put("number",list.size());
                return ResultVo.success(map1);
            }
        }


        return ResultVo.success();
    }

    @PostMapping("/uploadFile")
    @ResponseBody
    @ApiOperation(value = "上传文件", notes = "上传文件")
    @ApiImplicitParams({@ApiImplicitParam(value = "哈希值", name = "hash", required = true, paramType = "body"), @ApiImplicitParam(value = "文件流", name = "file", required = true, paramType = "body"), @ApiImplicitParam(value = "文件名称", name = "fileName", required = true, paramType = "body"),})
    public ResultVo uploadFile(HttpServletRequest request) {
        MultipartHttpServletRequest params = ((MultipartHttpServletRequest) request);
        List<MultipartFile> files = ((MultipartHttpServletRequest) request).getFiles("file");
        String _fileName = params.getParameter("fileName");
        String _hash = params.getParameter("hash");
        if (!StringUtil.isNotBlankAndNull(_hash)) {
            throw new ExpiredCredentialsException("哈希值不可为空！");
        }
        if (!StringUtil.isNotBlankAndNull(_fileName)) {
            throw new ExpiredCredentialsException("文件名称不可为空！");
        }
//        System.out.println("_fileName: " + _fileName);
//        System.out.println("_hash: " + _hash);
//        System.out.println("files: " + files);
//        System.out.println(params.getParameter("file"));
//        String _pathStr = "C:\\Users\\JH-rent\\Desktop\\java启动文件\\test" + "\\" + _hash + "\\";

        String _filePath=filePath;
        if (!_filePath.endsWith("/")) {
            _filePath+="/";
        }
        String _pathStr =_filePath+_hash+"/";

        FileOutputStream fileOut = null;
        //写入到文件（注意文件保存路径的后面一定要加上文件的名称）

        try {
            fileOut = new FileOutputStream(_pathStr + _fileName);
            BufferedOutputStream bos = new BufferedOutputStream(fileOut);
            BufferedInputStream bis = null;
            for (MultipartFile file : files) {
                //                file.transferTo(new File(_pathStr + file.getOriginalFilename()));
                //                System.out.println(file.getInputStream());
                bis = new BufferedInputStream(file.getInputStream());
            }

            byte[] buf = new byte[4096];
            int length = bis.read(buf);
            //保存文件
            while (length != -1) {
                bos.write(buf, 0, length);
                length = bis.read(buf);
            }
            bos.close();
            bis.close();
            return ResultVo.success();
        } catch (Exception e) {
            e.printStackTrace();
            return ResultVo.failure(e.getMessage());
        }

    }

    @GetMapping("/getMergeFile")
    @ApiOperation(value = "获取合并文件", notes = "获取合并文件")
    @ApiImplicitParams({@ApiImplicitParam(value = "哈希值", name = "hash", required = true, dataType = "String"), @ApiImplicitParam(value = "文件名称", name = "fileName", required = true, dataType = "String")})
    public ResultVo getMergeFile(@RequestParam(value = "hash") String hash, @RequestParam(value = "fileName") String fileName) {
//        String _pathStr = "C:\\Users\\JH-rent\\Desktop\\java启动文件\\test" + "\\" + hash + "\\";
//        String _pathStr1 = "C:\\Users\\JH-rent\\Desktop\\java启动文件\\test";

        String _filePath=filePath;
        if (!_filePath.endsWith("/")) {
            _filePath+="/";
        }
        String _pathStr = _filePath + hash + "/";
        String _pathStr1 = _filePath;
        try {
//            if (!_pathStr1.endsWith("\\")) {
//                _pathStr1 += "\\";
//            }
            _pathStr1 += fileName;
            FileUtil.mergeFile(_pathStr, _pathStr1);
            //合并成功删除加密文件
            FileUtil.deleteDirectory(_pathStr);
        } catch (IOException e) {
            e.printStackTrace();
        }
        Map<String, Object>map=new HashMap<>();
        map.put("fileUrl",_pathStr1);
        return ResultVo.success(map);
    }

}

import JSZip from "jszip";
import fileSaver from "file-saver";
import axios from 'axios'
import {
  Message,
  Notification
} from "element-ui";


//下载单个文件
export const downloadSingleFile = (url, filename) => {
  filename = filename || "文件名";
  let suffix = /\.([0-9a-zA-Z]+)$/i.exec(url)[1];
  const file_type = {
    'doc': 'application/msword',
    'bin': 'application/octet-stream',
    'exe': 'application/octet-stream',
    'so': 'application/octet-stream',
    'dll': 'application/octet-stream',
    'pdf': 'application/pdf',
    'ai': 'application/postscript',
    'xls': 'application/vnd.ms-excel',
    'ppt': 'application/vnd.ms-powerpoint',
    'dir': 'application/x-director',
    'js': 'application/x-javascript',
    'swf': 'application/x-shockwave-flash',
    'xhtml': 'application/xhtml+xml',
    'xht': 'application/xhtml+xml',
    'zip': 'application/zip',
    'mid': 'audio/midi',
    'midi': 'audio/midi',
    'mp3': 'audio/mpeg',
    'rm': 'audio/x-pn-realaudio',
    'rpm': 'audio/x-pn-realaudio-plugin',
    'wav': 'audio/x-wav',
    'bmp': 'image/bmp',
    'gif': 'image/gif',
    'jpeg': 'image/jpeg',
    'jpg': 'image/jpeg',
    'png': 'image/png',
    'css': 'text/css',
    'html': 'text/html',
    'htm': 'text/html',
    'txt': 'text/plain',
    'xsl': 'text/xml',
    'xml': 'text/xml',
    'mpeg': 'video/mpeg',
    'mpg': 'video/mpeg',
    'avi': 'video/x-msvideo',
    'movie': 'video/x-sgi-movie',
  }

  return new Promise((resolve, reject) => {
    console.log(url, "url");
    axios
      .get(url, {
        responseType: 'blob',
      })
      .then((res) => {
        const blob = new Blob([res.data], {
          type: file_type[suffix]
        }) // 构造一个blob对象来处理数据，并设置文件类型
        if (window.navigator.msSaveOrOpenBlob) {
          // 兼容IE10
          navigator.msSaveBlob(blob, filename)
        } else {
          const href = URL.createObjectURL(blob) // 创建新的URL表示指定的blob对象
          const a = document.createElement('a')
          a.style.display = 'none'
          a.href = href // 指定下载链接
          a.download = filename // 指定下载文件名
          a.click()
          URL.revokeObjectURL(a.href) // 释放URL对象
          a.remove();
        }
        resolve("下载成功！")
      })
  })



}


let file_num = 0;
const zip = new JSZip();
let zip_obj = [];
let floder_obj = [];
let file_order = 0;
let file_floder = null;
let file_data = [];
let file_title = "";
let cur_title = "";
let breakpoint_num = 500; //断点数据
let allowZipFile = true; //等待压缩完成
/**
 * [链接数组]
 * @param  {[type]} paths [{"name":"初三排课班级课表","path":""}]
 * @return {[type]} 下载压缩文件 [description]
 */
export const downloadCompressedFiles = ({
  paths = [],
  title = "文件批量下载",
  percentCallback = () => {},
}) => {
  allowZipFile = true;
  file_order = 0;
  cur_title = (title && title) || "文件批量下载";
  file_title = paths.length > breakpoint_num ? title ? `${title}文件第1~${breakpoint_num}个` : `文件批量下载文件1~${breakpoint_num}个` : (title && title) || "文件批量下载";
  zip_obj[file_order] = new JSZip();
  floder_obj[file_order] = zip_obj[file_order].folder(file_title);
  // file_floder = zip.folder((title && title) || "文件批量下载");
  file_num = 0;

  if (paths.length) {
    file_data = paths;
    if (file_num < paths.length) {
      getUrlBlod(paths[file_num].path, paths[file_num].name, percentCallback);
    }
  }

}

const getUrlBlod = (url, name, percentCallback = () => {}) => {
  // 从url获取文件后缀
  let suffix = /\.([0-9a-zA-Z]+)$/i.exec(url)[1];
  let promise = httpPost({
    url
  }).then((data) => {
    console.log(file_order, "data123");
    // console.log(floder_obj[file_order]);
    floder_obj[file_order].file(`${name}.${suffix}`, data, {
      binary: true
    }); //逐个添加文件
    file_num = file_num + 1;
    if (file_num != file_data.length) {
      if (file_num % breakpoint_num == 0) {
        let _temp = file_order;
        file_order = file_order + 1;
        // file_title = (breakpoint_num + file_num) <= file_data.length ? `${cur_title}文件第${breakpoint_num*_temp}~${file_num}个` : `${cur_title}文件第${file_num}~${file_data.length}个`;
        file_title=`${cur_title}文件第${breakpoint_num*_temp}~${file_num}个`;
        zip_obj[file_order] = new JSZip();
        floder_obj[file_order] = zip_obj[file_order].folder((file_title && file_title) || "文件批量下载");
        Notification({
          title: '提示',
          message: file_title + '开始压缩文件中！请等待',
          type: 'info',
          duration: 0
        });
        allowZipFile = false;
        zipGenerateAsync(_temp, percentCallback);
      }
      percentCallback(file_num)
      if (allowZipFile) {
        getUrlBlod(file_data[file_num].path, file_data[file_num].name, percentCallback);
      }
    } else {
      if (file_num >= file_data.length) {
        file_title = `${cur_title}文件第${breakpoint_num * file_order}~${file_data.length}个`;
      }
      let _temp = file_order;
      Notification({
        title: '提示',
        message: file_title + '开始压缩文件中！请等待',
        type: 'info',
        duration: 0
      });
      allowZipFile = false;
      zipGenerateAsync(_temp, percentCallback);
    }
    return file_num;
  }).catch(err => {
    // console.log(err, "err123");
    // Message.error(`${name}文件下载失败！`);
    file_num = file_num + 1;
    if (file_num != file_data.length) {
      if (file_num % breakpoint_num == 0) {
        let _temp = file_order;
        file_order = file_order + 1;
        // file_title = (breakpoint_num + file_num) <= file_data.length ? `${cur_title}文件第${breakpoint_num*_temp}~${file_num}个` : `${cur_title}文件第${file_num}~${file_data.length}个`;
        file_title=`${cur_title}文件第${breakpoint_num*_temp}~${file_num}个`;
        zip_obj[file_order] = new JSZip();
        floder_obj[file_order] = zip_obj[file_order].folder(file_title);
        Notification({
          title: '提示',
          message: file_title + '开始压缩文件中！请等待',
          type: 'info',
          duration: 0
        });
        allowZipFile = false;
        zipGenerateAsync(_temp, percentCallback);
      }
      percentCallback(file_num)
      if (allowZipFile) {
        getUrlBlod(file_data[file_num].path, file_data[file_num].name, percentCallback);
      }

    } else {
      if (file_num >= file_data.length) {
        file_title = `${cur_title}文件第${breakpoint_num * file_order}~${file_data.length}个`;
      }
      Notification({
        title: '提示',
        message: file_title + '开始压缩文件中！请等待',
        type: 'info',
        duration: 0
      });
      let _temp = file_order;
      allowZipFile = false;
      zipGenerateAsync(_temp, percentCallback);
    }
  });

}

const zipGenerateAsync = (num, percentCallback = () => {}) => {
  zip_obj[num].generateAsync({
    type: "blob"
  }).then((content) => {

    Notification({
      title: '成功',
      message: file_title + '压缩文件下载成功',
      type: 'success',
      duration: 0
    });
    // 生成二进制流
    fileSaver.saveAs(
      content,
      (file_title && `${file_title}.zip`) || "文件批量下载.zip"
    ); // 利用file-saver保存文件
    // Message.error(`压缩文件下载成功！`);
    if (file_num == file_data.length) {
      file_num = file_num + 1;
    }

    percentCallback(file_num);
    zip_obj[num] = "";
    floder_obj[num] = "";
    if (file_num < file_data.length) {
      allowZipFile = true;
      getUrlBlod(file_data[file_num].path, file_data[file_num].name, percentCallback);
    }

    // Message({
    //   message: '压缩包文件下载成功！',
    //   type: 'success'
    // });
  }).catch(err => {
    console.log(err, "压缩下载失败");
    zip_obj[num] = "";
    floder_obj[num] = "";
    allowZipFile = true;
    getUrlBlod(file_data[file_num].path, file_data[file_num].name, percentCallback);
    Notification.error({
      title: '错误',
      message: file_title + '压缩下载失败',
      duration: 0
    });
  });
}

const getInPath = (url, name = "") => {
  return new Promise(async (resolve, reject) => {
    // let result = await axiosDownload(url);
    // if (result) {
    //   resolve(result.data);
    // } else {
    //   reject();
    // }
    await axiosDownload(url).then(res => {
      resolve(res.data)
    }).catch(err => {
      reject(err)
    })
  });
};

const axiosDownload = (url, resOpts = {}) => {
  const {
    type = "get", data = ""
  } = resOpts;
  const queryArgs = {
    url,
    method: type,
    data,
    responseType: "blob",
    // headers: {//这个地方看情况而定，如果打开会存在跨域问题
    //   Accept: "application/json",
    //   "Content-Type": "application/json; charset=utf-8",
    //   withCredentials: true,
    // },
  };
  // tips: 这里直接返回的是response整体!
  return new Promise((resolve, reject) =>
    axios
    .request(queryArgs)
    .then((res) => resolve(res))
    .catch((err) => reject(err))
  );
};



const axiosConfig = {
  // headers: {
  //   'Content-Type': 'application/json;charset=UTF-8',
  // },
  // timeout: 60000,
  responseType: 'blob',
}

const request = axios.create(axiosConfig);

let isRefreshing = false;
let queue = [];

let runQueue = () => {
  isRefreshing = true
  let first = queue.shift();
  first.request()
}

//请求拦截
//所有的网络请求都会先走这个方法
// 添加请求拦截器,所有的网络请求都会先走这个方法，我们可以在它里面为请求添加一些自定义的内容
request.interceptors.request.use((config) => {
  // 在发送请求之前做些什么
  return config;
}, function (error) {
  return Promise.reject(error);
});

// 添加响应拦截器
request.interceptors.response.use(function (response) {
  isRefreshing = false
  if (!(queue.length === 0)) runQueue()
  return response.data
}, function (error) {
  console.log(error, 2343);
  isRefreshing = false
  if (!(queue.length === 0)) runQueue()
  // 对响应错误做点什么
  return Promise.reject(error);
});

const httpPost = async ({
  url,
  method = 'get',
  data = "",
}) => {
  return new Promise((resolve, reject) => {
    queue.push({
      request: () => {
        request({
          method,
          url,
          data,
        }).then(res => {
          resolve(res)
        }).catch(e => {
          reject(e)
        })
      }
    })
    if (!isRefreshing) runQueue()
  })
}