Java 不需要本地生成文件zip打包

public void downloadMutiFilesForDatabase(List<FileManager> fileManagerList,String fileName, HttpServletResponse response) throws Exception {
        //FTPSClient ftpClient =null;
        if(fileManagerList == null )
        {
            return;
        }
        ZipOutputStream zipOut  = new ZipOutputStream(response.getOutputStream());
        response.setCharacterEncoding("UTF-8");
        response.setContentType("multipart/form-data");
        response.setHeader("Content-Disposition", "attachment;fileName="+ new String((fileName+".zip").getBytes("UTF-8"),"ISO-8859-1"));
        for (FileManager e : fileManagerList){
            if(e.getSavename() != null){
                ZipEntry z=new ZipEntry(e.getFilename());//这是文件名例如"我的文件.txt"
                zipOut.putNextEntry(z);
                zipOut.write(e.getSavename().getBytes());//这是文件内容
            }
        }
        zipOut.flush();
        zipOut.close();
    }