Java Servlet-下载并转发到页面

Question

I am trying to send a download and then forward to a page. but once the download completes the forward doesn't happen.

Answer 1

That's normal behavior. A file download will write the content of the file into the response and close the response stream, and a forward will try to write new content on the already closed response, resulting in nothing new being written in the response.

Solution:

In your client, use JavaScript to fire the file download, and also fire a request to the page you want to forward.

Client code adapted from here: Download a file and redirect...or alternative

<script>
function thanks() {
    setTimeout(function () {
        document.location.pathname = "another.jsp";
    }, 1000);
}
</script>

<a href="${request.contextPath}/yourServlet?file=foo.dat" onclick="thanks()">Download now!</a>