java多文件打包下载方法

/**

* 根据文件，进行压缩，批量下载

* @param response

* @param files 文件转换成的byte字节流

* @throws Exception

*/

public void downloadBatchByFile(HttpServletResponse response, Map<String, byte[]> files, String zipName){

  try{

    response.reset();

    zipName = java.net.URLEncoder.encode(zipName, "UTF-8");

    response.setContentType("application/vnd.ms-excel;charset=UTF-8");

    response.setHeader("Content-Disposition", "attachment;filename=" + zipName + ".zip");

    ZipOutputStream zos = new ZipOutputStream(response.getOutputStream());

    BufferedOutputStream bos = new BufferedOutputStream(zos);

    for(Entry<String, byte[]> entry : files.entrySet()){

      String fileName = entry.getKey(); //每个zip文件名

      byte[] file = entry.getValue(); //这个zip文件的字节

      BufferedInputStream bis = new BufferedInputStream(new ByteArrayInputStream(file));

      zos.putNextEntry(new ZipEntry(fileName));

      int len = 0;

      byte[] buf = new byte[10 * 1024];

      while( (len=bis.read(buf, 0, buf.length)) != -1){

        bos.write(buf, 0, len);

      }

      bis.close();

      bos.flush();

    }

    bos.close();

  }catch(Exception e){

    e.printStackTrace();

  }

}

转载自:https://blog.youkuaiyun.com/danjiawei/article/details/82630732