springboot+vue打包成zip文件并且下载

ruoyi框架下开发的，使用了

hutool工具包

自己记录一下。前提是文件已经存放在后台服务器上。如果是其他框架或者流文件， 参照博客：

vue+springboot压缩多个文件、压缩包下载、单文件下载 - 代码先锋网 (codeleading.com)

前段vue

downloadExpress(row) {
      const uuids = row.uuid || this.ids;
      this.$download.zip("/business/hawbbill/downloadExpress?uuids=" + uuids, new Date().getTime());
    }

后段：

controller：

import cn.hutool.core.date.DateUtil;
import cn.hutool.core.io.FileUtil;
import cn.hutool.core.util.ZipUtil;
import cn.hutool.json.JSONObject;
import com.lh.common.annotation.Log;
import com.lh.common.config.RuoYiConfig;
import com.lh.common.core.controller.BaseController;
import com.lh.common.core.domain.AjaxResult;
import com.lh.common.core.page.TableDataInfo;
import com.lh.common.core.text.Convert;
import com.lh.common.enums.BusinessType;
import com.lh.common.utils.DictUtils;
import com.lh.common.utils.StringUtils;
import com.lh.common.utils.poi.ExcelUtil;
import com.lh.common.utils.uuid.IdUtils;
import org.apache.commons.io.IOUtils;
import org.jetbrains.annotations.NotNull;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.access.prepost.PreAuthorize;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;



@RestController
@RequestMapping("/business/hawbbill")
public class HouseAirWaybillController extends BaseController {
    @Autowired
    private IHouseAirWaybillService houseAirWaybillService;

    @Log(title = "下载zip", businessType = BusinessType.EXPORT)
    @PreAuthorize("@ss.hasPermi('business:waybill:express')")
    @GetMapping("/downloadExpress")
    public void downloadExpress(HttpServletResponse response, String uuids) throws Exception {

        String[] fileIds = Convert.toStrArray(uuids);
        int size = fileIds.length;
        if (size == 0 || fileIds == null) {
            throw new Exception("下载文件id数组为空!");
        }
        //获取包裹信息
        List houseAirWaybillList = this.houseAirWaybillService.selectHouseAirWaybillListByUuids(fileIds, false, false);

        //1、创建一个时间戳 将每次下载的文件夹区分开
        long l = System.currentTimeMillis();

        // 本次文件操作的根目录，操作完成之后删除
        String BASE_FILE_ROOT_PATH = RuoYiConfig.getDownloadPath() + l;
        // 存放复制的文件夹临时路径
        String FILE_ROOT_PATH = BASE_FILE_ROOT_PATH + File.separator + "zipTemp";
        // 存放压缩之后的zip存放路径
        String ZIP_PATH = BASE_FILE_ROOT_PATH + File.separator + l + ".zip";


        for (int i = 0; i < houseAirWaybillList.size(); i++) {
            HouseAirWaybill houseAirWaybill = houseAirWaybillList.get(i);
            String fileName = houseAirWaybill.getHouseNo() + ".pdf";
            // 2、复制文件到制定文件夹
            FileUtil.copy(houseAirWaybill.getFileUrl(), FILE_ROOT_PATH + File.separator + fileName, true);
        }
        // 3、压缩已经写入文件的文件夹，并获得压缩包路径
        String zipPath = downZIP(FILE_ROOT_PATH, ZIP_PATH);
        //下载文件
        byte[] data = Files.readAllBytes(Paths.get(zipPath));
        res(response, data);
        // 4、先清空要被压缩的的文件夹
        FileUtil.del(new File(BASE_FILE_ROOT_PATH));
    }

    /**
     * @param s       被压缩的文件夹路径
     * @param zipPath 压缩后生成的文件路径
     * @Author Mr Pan
     * @Description 压缩文件
     * @Date 3:47 下午 2022/3/15
     * @Return java.lang.String
     **/
    public static String downZIP(String s, String zipPath) {
        //ZipUtil.zip()是一个工具类，具体看图一的import
        File file = ZipUtil.zip(s, zipPath);
        return file.getAbsolutePath();
    }


    /**
     * 生成zip文件
     */
    private void res(HttpServletResponse response, byte[] data) throws IOException {
        response.reset();
        response.addHeader("Access-Control-Allow-Origin", "*");
        response.addHeader("Access-Control-Expose-Headers", "Content-Disposition");
        response.setHeader("Content-Disposition", "attachment;");
        response.addHeader("Content-Length", "" + data.length);
        response.setContentType("application/octet-stream; charset=UTF-8");
        IOUtils.write(data, response.getOutputStream());

    }


    

}