springboot 批量下载文件, zip压缩下载

一、使用hutool 工具类

效果：下载速度可以

1、依赖：hutool


<dependency><groupId>cn.hutool</groupId><artifactId>hutool-all</artifactId><version>5.8.26</version>
</dependency>

2、调用方式

import cn.hutool.core.util.*;
HttpServletResponse response;List<String> resourceList = StrUtil.split(fileUrls, ",");List<File> fileList = resourceList.stream().map(x->new File("文件路径" + 根据预览路径获取对应文件路径(x))).toList();response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);FileUtils.setAttachmentResponseHeader(response, zipName);ZipUtil.zip(response.getOutputStream(), Charset.defaultCharset(),true,null, ArrayUtil.toArray(fileList,File.class));

3、依赖工具类

import cn.hutool.core.util.ArrayUtil;
import cn.hutool.core.util.StrUtil;
import cn.hutool.core.util.URLUtil;
import jakarta.servlet.http.HttpServletResponse;
import org.apache.commons.io.IOUtils;import java.io.*;
import java.util.List;
import java.util.Optional;
import java.util.concurrent.atomic.AtomicReference;public class FileUtils {/*** 百分号编码工具方法** @param s 需要百分号编码的字符串* @return 百分号编码后的字符串*/public static String percentEncode(String s) {return URLUtil.encode(s).replaceAll("\\+", "%20");}/*** 下载文件名重新编码** @param response     响应对象* @param realFileName 真实文件名*/public static void setAttachmentResponseHeader(HttpServletResponse response, String realFileName) {String percentEncodedFileName = percentEncode(realFileName);StringBuilder contentDispositionValue = new StringBuilder();contentDispositionValue.append("attachment; filename=").append(percentEncodedFileName).append(";").append("filename*=").append("utf-8''").append(percentEncodedFileName);response.addHeader("Access-Control-Expose-Headers", "Content-Disposition,download-filename");response.setHeader("Content-disposition", contentDispositionValue.toString());response.setHeader("download-filename", percentEncodedFileName);}}

二、原生java方式

参考

使用ZipEntry压缩与解压缩-CSDN博客文章浏览阅读1.8w次，点赞4次，收藏31次。import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io_zipentryhttps://blog.csdn.net/sinat_34620530/article/details/54093862

java下载 zip附件_zipentry通过链接下载附件-CSDN博客文章浏览阅读1.1k次。1. 将文件下载到文件夹中,打包zip放入浏览器/* * Copyright 2019 yifen7.com All right reserved. This software is the * confidential and proprietary information of yifen7.com ("Confidential * Information"). ..._zipentry通过链接下载附件https://blog.csdn.net/weixin_41564440/article/details/102631447

1、原生的下载

可以封装下载工具类，这里就没优雅实现（懒得改之前的代码）

import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import java.util.zip.ZipOutputStream;HttpServletResponse response = 前台获取;String fileName = "data_bk_" + getCurrentTimeStr();response.setHeader("Content-Disposition", "attachment;filename=" + fileName + ".zip");response.setContentType("application/octet-stream;charset=UTF-8");
OutputStream outputStream= null;ry {outputStream= response.getOutputStream();// 2 新建压缩包、文件扩展名根据驱动判断ZipOutputStream zos = new ZipOutputStream(outputStream);
String saveSqlName = "添加的文件名";// 1.1 将备份的sql放入压缩包ZipEntry fileEntry = new ZipEntry(saveSqlName);zos.putNextEntry(fileEntry);// 1.2 通过文件流将该文件写入
String saveSqlFile = "d:\\xx.sql"FileInputStream fis = new FileInputStream(saveSqlFile);byte[] buffer = new byte[4096];int len;while ((len = fis.read(buffer)) != -1) {messageDigest.update(buffer, 0, len);zos.write(buffer, 0, len);zos.flush();}fis.close();zos.closeEntry();//或者
/**
BufferedInputStream bis = new BufferedInputStream(new FileInputStream(file));while ((count = bis.read(data, 0, bufferLen)) != -1) {zos.write(data, 0, count);}
bis.close();
zos.closeEntry();
**///2.1 多个文件重复操作...} catch (Exception e) {log.error("数据备份出错：{}", e);} finally {try {os.flush();os.close();} catch (IOException e) {log.error("数据备份出错：{}", e);}}