将ZipOutputStream返回到浏览器 [英] Returning ZipOutputStream to browser

问题描述

我有一个ZipOutputStream，我想返回浏览器。我想要的体验是用户单击一个锚标签，然后为我拥有的ZipOutputStream显示一个文件下载提示。

I have an ZipOutputStream that I want to return to the browser. The experience I would like is that the user clicks an anchor tag, and then a file download prompt is displayed for the ZipOutputStream that I have.

你如何将ZipOutputStream传回浏览器？

How do you get the ZipOutputStream back to the browser?

推荐答案

昨天只需要做同样的事情。

Just had to do this exact same thing yesterday.

    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    ZipOutputStream zip = new ZipOutputStream(baos);

    .... populate ZipOutputStream

    String filename = "out.zip";
    // the response variable is just a standard HttpServletResponse
    response.setHeader("Content-Disposition","attachment; filename=\"" + filename + "\"");
    response.setContentType("application/zip");

    try{            
        response.getOutputStream().write(baos.toByteArray());
        response.flushBuffer();
    }
    catch (IOException e){
        e.printStackTrace();        
    }
    finally{
        baos.close();
    }

注意我正在使用ByteArrayOutputStream包装器和toByteArray，但您可能只需写入任何其他类型的OutputStream直接传递给具有标准InputStream.read（）OutputStream.write（）循环的响应。

Note I'm using a ByteArrayOutputStream wrapper and toByteArray but you could probably just write any other type of Outputstream directly to the response with a standard InputStream.read() OutputStream.write() loop.

我不确定哪个更快如果有的话，但我怀疑我在这里使用ByteArrayOutputStream可能不是最有记忆力的方法：

Off hand I'm actually not sure which is faster if any, but I suspect my use of ByteArrayOutputStream here might not be the most memory conscious approach:

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