java 批量下载文件 打包成zip包

1. 创建DownLoadUrlStream承载数据

import lombok.Data;import java.io.InputStream;@Datapublic class DownLoadUrlStream {    //文件地址 比如/123/234/1.txt    private String url;    //文件流    private InputStream stream;}

2. 创建工具类，进行zip包压缩

import com.valid.util.view.DownLoadUrlStream;import com.valid.util.view.DownLoadUrlString;import org.springframework.stereotype.Component;import javax.servlet.Http.httpservletResponse;import java.io.IOException;import java.io.InputStream;import java.net.URLEncoder;import java.util.HashSet;import java.util.List;import java.util.Set;import java.util.zip.ZipEntry;import java.util.zip.ZipOutputStream;@Componentpublic class DownloadUtils {    public void downloadFolder(List<DownLoadUrlStream> downLoadUrlStreams,String zipName, HttpServletResponse response) throws IOException {        response.setContentType("application/octet-stream");        response.setHeader("Content-Disposition", "attachment; filename=\"" + URLEncoder.encode(zipName,"UTF-8")  + "\"");        Set<String> paths = new HashSet<>(); // 用于记录已经添加到压缩文件中的目录        try {            ZipOutputStream zipOut = new ZipOutputStream(response.getOutputStream());            for (DownLoadUrlStream file : downLoadUrlStreams) {                String virtualPath = file.getUrl().substring(1);                String[] pathArray = virtualPath.split("/");                //构建文件的目录结构                StringBuilder sb = new StringBuilder();                for (int i = 0; i < pathArray.length - 1; i++) {                    sb.append(pathArray[i]).append("/");                    String folderPath = sb.toString();                    if (!paths.contains(folderPath)) { // 如果该目录还未被添加到压缩文件中，则添加目录                        ZipEntry folderEntry = new ZipEntry(folderPath);                        zipOut.putNextEntry(folderEntry);                        zipOut.closeEntry();                        paths.add(folderPath); // 将新添加的目录记录到集合中                    }                }                ZipEntry entry = new ZipEntry(virtualPath);                zipOut.putNextEntry(entry);                //将文件流写入文件中                InputStream inputStream =  file.getStream();                byte[] buffer = new byte[1024];                int len;                while ((len = inputStream.read(buffer)) > 0) {                    zipOut.write(buffer, 0, len);                }                inputStream.close();                zipOut.closeEntry();            }            zipOut.flush();            zipOut.close();        } catch (IOException e) {            e.printStackTrace();        }    }  }   

3. 封装数据，调用方法即可

来源地址：https://blog.csdn.net/qq_42900469/article/details/130982230