JSP重定向：会话丢失问题
使用 response.sendRedirect（URL）替换了< jsp：forward page =URL> code>，我发现我知道丢失会话一旦重定向发生。有没有办法保留会话与重定向，或重新构建会话cookie并与重定向一起发送？
Having replaced a <jsp:forward page="URL"> with a response.sendRedirect("URL");, I find I know lose the session once the redirect occurs. Is there a way to preserve the session with a redirect, or to reconstitute the session cookie and send it along with the redirect?
我知道我可以使用JavaScript通过
I know I could use JavaScript via window.location = "URL";, but that is far from ideal!
任何帮助？
您不应该重新发送cookie，因为如果您建立了会话，cookie应该已经在客户端（浏览器）。
You should not have to resend the cookie, because if you had a session established, the cookie should already be on the client (the browser).
您确定要失去课程吗？你如何检测这个？在您重定向到的网址表示的页面中是否有新会话？
Are you sure you lose the session? How do you detect this? Do you have a new session in the page represented by the url you redirect to?
浏览器是否接受Cookie？否则你应该使用url重写。这是最有可能的原因。您可以尝试使用 HttpServletResponse.encodeRedirectURL ，然后将网址传递给 response.sendRedirect 。
Does the browser accept cookies? Otherwise you should use url rewriting. This is the most probable cause. You could try use HttpServletResponse.encodeRedirectURL before passing the url to response.sendRedirect.