java下载多个文件并打包

您好，可以使用Java的IO流和ZipOutputStream类来实现下载多个文件并打包的功能。具体实现可以参考以下代码：

import java.io.*;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

public class FileDownloader {
    public static void main(String[] args) {
        String[] urls = {"http://example.com/file1.txt", "http://example.com/file2.txt", "http://example.com/file3.txt"};
        String zipFileName = "files.zip";
        downloadAndZipFiles(urls, zipFileName);
    }

    public static void downloadAndZipFiles(String[] urls, String zipFileName) {
        try {
            ZipOutputStream zipOut = new ZipOutputStream(new FileOutputStream(zipFileName));
            byte[] buffer = new byte[1024];
            for (String url : urls) {
                URLConnection conn = new URL(url).openConnection();
                InputStream in = conn.getInputStream();
                ZipEntry entry = new ZipEntry(getFileNameFromUrl(url));
                zipOut.putNextEntry(entry);
                int len;
                while ((len = in.read(buffer)) > ) {
                    zipOut.write(buffer, , len);
                }
                in.close();
            }
            zipOut.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public static String getFileNameFromUrl(String url) {
        int index = url.lastIndexOf("/");
        return url.substring(index + 1);
    }
}

以上代码可以从多个URL下载文件，并将它们打包成一个zip文件。