把服务器的多张图片下载为ZIP_下载服务器多张图片-优快云博客

本文介绍了一种使用Java代码将用户身份证正反面图片导出为ZIP文件的方法。通过获取图片URL，利用ZipOutputStream将图片压缩并下载。代码实现了从URL读取图片、创建ZIP条目、写入文件到输出流的全过程。

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代码

//导出用户身份证正反面为ZIP
@GetMapping("/getUserCardForZip")
public void getUserCardForZip(String userId, HttpServletRequest request, HttpServletResponse response) throws Exception {
HashMap idCardUrl = (HashMap)zpUserService.getIdCardUrl(userId);
String phone = (String) idCardUrl.get(“phone”);
String fan = (String) idCardUrl.get(“fan”);
String zheng = (String) idCardUrl.get(“zheng”);
String [] urls={fan,zheng};
response.setContentType(MediaType.APPLICATION_OCTET_STREAM.toString());
response.setHeader(“Content-Disposition”,“attachment; filename=”"+phone+".zip"");
ZipOutputStream outStream = new ZipOutputStream(response.getOutputStream());

    for(String u:urls){
        String ext=u.substring(u.lastIndexOf("."), u.length());
        String fileName=""+System.currentTimeMillis()+ext;
        URL url = new URL(u);
        URLConnection c = url.openConnection();
        c.connect();
        int fileLength=c.getContentLength();
        System.out.println("file size:"+fileLength);
        InputStream is = c.getInputStream();
        outStream.putNextEntry(new ZipEntry(fileName));
        byte[] buffer=new byte[2048];
        int len;
        while((len=is.read(buffer))!=-1){
            outStream.write(buffer,0,len);
        }
        //刷新流
        try {
            if (outStream != null) {
                outStream.flush();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    //关闭流，
    try {
        if (outStream != null) {
            outStream.close();
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
    long end=System.currentTimeMillis();

}