javascript 注销后不要回到jsp中的上一页
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after logout do not go back to previous page in jsp
提问by manchu
To prevent user to go back after logout i used following code in home.jsppage
为了防止用户在注销后返回，我在home.jsp页面中使用了以下代码
<%
if (session.getAttribute("authe") != null && session.getAttribute("authe").equals(true)) {
}
else {
response.sendRedirect("login.jsp");
}
%>
and I invalidated the session in logout.jsp.
我使logout.jsp.
It worked fine but when I pressed back button after logout it still goes to home page but after reloading that home page it moves to the login page. I thought it it due to the browser default action.
它工作正常，但是当我在注销后按下后退按钮时，它仍会转到主页，但在重新加载该主页后，它会移动到登录页面。我认为这是由于浏览器的默认操作。
How to make it to work effectively?
如何让它有效地工作？
回答by Harika Choudary Kanikanti
In home.jspput header as no-cache:
在home.jsp放标题为no-cache：
<%
response.addHeader("Cache-Control", "no-cache,no-store,private,must-revalidate,max-stale=0,post-check=0,pre-check=0");
response.addHeader("Pragma", "no-cache");
response.addDateHeader ("Expires", 0);
%>
回答by Deepak Singh
You can use:
您可以使用：
<%
try {
response.setHeader("Cache-Control","no-cache");
response.setHeader("Cache-Control","no-store");
response.setHeader("Pragma","no-cache");
response.setDateHeader ("Expires", 0);
if (session.getAttribute("userid")==null) {
response.sendRediredirect("login.jsp");
}
else {}
}
catch(Exception ex) {
out.println(ex);
}
%>
