JSP兑现点击链接后下载文件(相当于右键另存)功能

JSP实现点击链接后下载文件(相当于右键另存)功能

/**     * 实现文件另存功能     *      * @param text     *            文件内容     * @param fileName     *            文件名称     * @return     */    protected String renderFile(String text, String fileName)            throws IOException    {        response.addHeader("Content-Disposition", "attachment; filename="                + fileName);        response.setContentType("application/octet-stream");        response.setCharacterEncoding("GB2312");        response.getWriter().write(text);        response.flushBuffer();        response.getWriter().close();        return null;    }

下载的action:

/**     * 提供下载的方法     * @return     */    public String down()    {        String dir = getFullPath() + "/upload/file/";        try        {            if (!FileUtils.exists(dir))            {                new File(dir).mkdirs();            }            Random r = new Random(System.currentTimeMillis());            Integer randomInt = r.nextInt();            this.renderFile("test content:" + randomInt,randomInt + ".txt");        }        catch (IOException e)        {            e.printStackTrace();            this.renderText(e.getMessage());        }        return null;    }

页面链接调用:

<a href="${ctx}/va/va!down.do" >下载</a>

2楼guanghui8787昨天 13:55

拿走喽

1楼lihe777999昨天 13:20

呵呵呵