[英]Redirect back to previous jsp page with previous form value from servlet
[英]ZK - redirect the user back to previous page
關於如何干凈利落地將用戶重定向回上一頁的任何想法?
如果前一頁在應用程序本身內,我只關心重定向它們。 我曾想過在用戶的Session中存儲某種DIY歷史,但這看起來並不干凈或不健全。 我知道我們可以使用Executions.sendRedirect(url)
重定向用戶,但我不確定獲取上一頁網址的最佳方法。
ZK擁有自己的瀏覽器歷史記錄管理,但我認為在嘗試啟動真正的瀏覽器重定向時不會使用它。
嘗試這個:
// check if request needs to be sent back
if (!isValidRequest()) {
// get the current execution context
Execution exec = Executions.getCurrent();
// retrieve HTTP request, response objects
HttpServletRequest request = (HttpServletRequest) exec.getNativeRequest();
HttpServletResponse response = (HttpServletResponse) exec.getNativeResponse();
// get the referring URL from HTTP header
String referrer = request.getHeader("Referer");
/* don't need to use this unless doing a forward (server-side)
if (referrer != null) {
URL ref = new URL(referrer);
referrer = ref.getPath().substring(request.getContextPath().length());
} else {
referrer = "/index.jsp"; // home page
}
*/
// HTTP 301 redirect (client-side); encoding ensures URL rewriting if required
response.sendRedirect(response.encodeRedirectURL(referrer));
exec.setVoided(true); // no need to create UI; about to redirect
}
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