Java Tutorial/JSP/Cookie
Содержание
Create Cookie
<source lang="java">
<HTML>
<HEAD>
<TITLE>Reading a Cookie</TITLE>
</HEAD>
<BODY>
Reading a Cookie
<%
Cookie cookie1 = new Cookie("message", "Hello!");
cookie1.setMaxAge(24 * 60 * 60);
response.addCookie(cookie1);
%>
refresh to see the Cookie
<%
Cookie[] cookies = request.getCookies();
for(int i = 0; i < cookies.length; i++) {
if (cookies[i].getName().equals("message")) {
out.println("The cookie says " + cookies[i].getValue());
}
}
%>
</BODY>
</HTML></source>
Refresh to see the Cookie
<source lang="java">
<HTML>
<HEAD>
<TITLE>Reading a Cookie</TITLE>
</HEAD>
<BODY>
Reading a Cookie
<%
Cookie cookie1 = new Cookie("message", "Hello!");
cookie1.setMaxAge(24 * 60 * 60);
response.addCookie(cookie1);
%>
refresh to see the Cookie
<%
Cookie[] cookies = request.getCookies();
for(int i = 0; i < cookies.length; i++) {
if (cookies[i].getName().equals("message")) {
out.println("The cookie says " + cookies[i].getValue());
}
}
%>
</BODY>
</HTML></source>
Setting and Reading Cookies
<source lang="java">
<HTML>
<HEAD>
<TITLE>Setting and Reading Cookies</TITLE>
</HEAD>
<BODY
<%
Cookie c = new Cookie("message", "Hello!");
c.setMaxAge(24 * 60 * 60);
response.addCookie(c);
%>
<%
Cookie[] cookies = request.getCookies();
boolean foundCookie = false;
for(int i = 0; i < cookies.length; i++) {
Cookie cookie1 = cookies[i];
if (cookie1.getName().equals("color")) {
out.println("bgcolor = " + cookie1.getValue());
foundCookie = true;
}
}
if (!foundCookie) {
Cookie cookie1 = new Cookie("color", "cyan");
cookie1.setMaxAge(24*60*60);
response.addCookie(cookie1);
}
%>
>
Setting and Reading Cookies
This page will set its background color using a cookie after refreshing. </BODY>
</HTML></source>
