我试着在我的网站上下载一首歌。我正在使用我之前使用的下载servlet来制作可供下载的zip文件。我已经完成了代码,一切似乎都在工作,输出流读取整个文件,但不显示保存对话框。有任何想法吗?谢谢你的帮助。代码如下:
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String song = request.getParameter("song");
StringBuilder filePath = new StringBuilder();
try {
Thread.sleep(1);
String[] info = getSongInfo(song);
filePath.append("D:\\My Music\\My Song.m4a");
File file = new File(filePath.toString());
if (!file.exists()) {
throw new FileNotFoundException(file.getAbsolutePath());
}
response.setHeader("Content-Length", String.valueOf(file.length()));
response.setHeader("Content-Type", "audio/mp4a-latm");
response.setHeader("Content-disposition", "attachment; filename="+song+".m4a");
BufferedInputStream bis = new BufferedInputStream(new FileInputStream(file));
BufferedOutputStream bos = new BufferedOutputStream(response.getOutputStream());
byte[] buf = new byte[4096];
while (true) {
int length = bis.read(buf);
if (length == -1) {
break;
}
bos.write(buf, 0, length);
}
bos.flush();
bos.close();
bis.close();
} catch (InterruptedException e) {
System.err.println("Error message: " + e.getMessage());
}
}
使用:
调用 dojo.xhrGet(
{
url: "/downloadSong?song="+item.title[0]
});
答案 0 :(得分:1)
您无法通过ajax下载文件。由于安全原因,JavaScript无法生成另存为对话框,也无法将它们存储在磁盘中。它将消耗响应,但它无法做任何明智的事情。
您需要使用window.location
代替:
window.location = "/downloadSong?song=" + item.title[0];
感谢Content-Disposition: attachment
标题,它不会影响当前打开的页面。