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java生成zip文件，zip文件分两种：一种是包含文件夹、一种是不包含文件夹

生成zip文件的方式

        ZipOutputStream zipOutputStream = new ZipOutputStream(response.getOutputStream());// 文件夹名称String folder = "download/";ZipEntry ze = new ZipEntry(folder);zipOutputStream.putNextEntry(ze);ze = new ZipEntry(folder + "test.xlsx");zipOutputStream.putNextEntry(ze);// 读取文件内容并写入ZIP文件中FileInputStream fis = new FileInputStream(new File(excelName));byte[] buffer = new byte[1024];int len;while ((len = fis.read(buffer)) > 0) {zipOutputStream.write(buffer, 0, len);}fis.close();zipOutputStream.closeEntry();zipOutputStream.close();