Lige en rettelse. Pyt med det timeout. Det jeg mente er at når browseren lukkes eller man trykker lod ud, så skal der logges ud på hjemmesiden. Min cookie som jeg har lavet ser sådan ud:
package ExamplePackage;
import java.io.IOException;
import java.util.Date;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@WebServlet("/CookieUsageServlet")
public class CookieUsageServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doPost(request, response);
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
Cookie cookie = getCookie(request, response);
printResponse(response, cookie);
}
private Cookie getCookie(HttpServletRequest request, HttpServletResponse response) {
Cookie cookie = null;
Cookie[] cookiesArray = request.getCookies();
if(cookiesArray != null) {
for(int x = 0; x < cookiesArray.length; x++) {
if(cookiesArray[x].getName().equals("test_cookie")) cookie = cookiesArray[x];
}
}
if(cookie != null) {
System.out.println("cookie retrieved");
} else {
int timeToExpireCookie = new Integer(getServletContext().getInitParameter("time-to-expire-cookie")).intValue();
cookie = new Cookie("test_cookie", Long.toString(new Date().getTime()));
cookie.setMaxAge(timeToExpireCookie);
cookie.setPath(request.getContextPath()); // Sti til login
System.out.println("Cookie created...");
response.addCookie(cookie);
}
return cookie;
}
private void printResponse(HttpServletResponse response, Cookie cookie) throws IOException {
PrintWriter printWriter = response.getWriter();
response.setContentType("text/html");
printWriter.println("<html>");
printWriter.println("<head><title>Cookie In JAVA servlet</title></head>");
printWriter.println("<body>");
printWriter.println("<cookie name: " + cookie.getName() + "<br>");
printWriter.println("<cookie value: " + cookie.getValue() + "<br>");
printWriter.println("<time to expire cookie in seconds: " + cookie.getMaxAge() + "<br>");
printWriter.println("</body>");
printWriter.println("</html>");
}
}
web.xml:
<context-param>
<param-name>time-to-expire-cookie</param-name>
<param-value>20</param-value>
</context-param>
