larry*wei 2010-12-28 10:21 采纳率: 0%
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下载文件作者: jQuery.Ajax

I have a Struts2 action in the server side for file downloading.

<action name="download" class="com.xxx.DownAction">
    <result name="success" type="stream">
        <param name="contentType">text/plain</param>
        <param name="inputName">imageStream</param>
        <param name="contentDisposition">attachment;filename={fileName}</param>
        <param name="bufferSize">1024</param>
    </result>
</action>

However when I call the action using the jQuery:

$.post(
  "/download.action",{
    para1:value1,
    para2:value2
    ....
  },function(data){
      console.info(data);
   }
);

in Firebug I see the data is retrieved with the Binary stream. I wonder how to open the file downloading window with which the user can save the file locally?

转载于:https://stackoverflow.com/questions/4545311/download-a-file-by-jquery-ajax

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  • hurriedly% 2012-04-02 03:48
    关注

    Bluish is completely right about this, you can't do it through Ajax because JavaScript cannot save files directly to a user's computer (out of security concerns). Unfortunately pointing the main window's URL at your file download means you have little control over what the user experience is when a file download occurs.

    I created jQuery File Download which allows for an "Ajax like" experience with file downloads complete with OnSuccess and OnFailure callbacks to provide for a better user experience. Take a look at my blog post on the common problem that the plugin solves and some ways to use it and also a demo of jQuery File Download in action. Here is the source

    Here is a simple use case demo using the plugin source with promises. The demo page includes many other, 'better UX' examples as well.

    $.fileDownload('some/file.pdf')
        .done(function () { alert('File download a success!'); })
        .fail(function () { alert('File download failed!'); });
    

    Depending on what browsers you need to support you may be able to use https://github.com/eligrey/FileSaver.js/ which allows more explicit control than the IFRAME method jQuery File Download uses.

    本回答被题主选为最佳回答 , 对您是否有帮助呢?
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