压缩文件夹并返回浏览器压缩流

依赖

    cn.hutool
    hutool-all
    5.2.3


代码

//生成zip文件
ZipUtil.zip(templateDir + "rb/");
//TODO 将压缩包流返回
String url = templateDir + "rb.zip";
File file = new File(url);
InputStream fis = new BufferedInputStream(new FileInputStream(file));
byte[] buffer = new byte[fis.available()];
fis.read(buffer);
fis.close();
response.reset();
String excelTitle = "历史数据";
String fileName = URLEncoder.encode(excelTitle, "UTF-8").replaceAll("\\+", "%20");
// 设置response的Header
response.setHeader("Content-disposition", "attachment;filename*=utf-8''" + fileName + ".zip");
response.setContentType("application/x-download;charset=utf-8");
OutputStream toClient = new BufferedOutputStream(response.getOutputStream());
toClient.write(buffer);
toClient.flush();
toClient.close();
//删除文件夹下文件
delAllFile(templateDir + "rb/");

工具方法

public static boolean delAllFile(String path) {
        boolean flag = false;
        File file = new File(path);
        if (!file.exists()) {
            return flag;
        }
        if (!file.isDirectory()) {
            return flag;
        }
        String[] tempList = file.list();
        File temp = null;
        for (int i = 0; i < tempList.length; i++) {
            if (path.endsWith(File.separator)) {
                temp = new File(path + tempList[i]);
            } else {
                temp = new File(path + File.separator + tempList[i]);
            }
            if (temp.isFile()) {
                temp.delete();
            }
            if (temp.isDirectory()) {
                delAllFile(path + "/" + tempList[i]);//先删除文件夹里面的文件
//                delFolder(path + "/" + tempList[i]);//再删除空文件夹
                flag = true;
            }
        }
        return flag;
    }