Java Learning---Cookie tool

Cookieutils.java

Import Java.io.unsupportedencodingexception;import Java.net.urldecoder;import Java.net.urlencoder;import Javax.servlet.http.cookie;import Javax.servlet.http.httpservletrequest;import javax.servlet.http.httpservletresponse;/** * * Cookie Tool class * */public final class Cookieutils {/** * Gets the value of the cookie, does not Code * * @param request * @param cookiename * @return */public static String Getcookievalue (Httpser    Vletrequest request, String cookiename) {return getcookievalue (request, cookiename, false); }/** * Gets the value of the cookie, * * @param request * @param cookiename * @return */public static Strin G Getcookievalue (HttpServletRequest request, String CookieName, Boolean isdecoder) {cookie[] cookielist = Request.        GetCookies ();        if (cookielist = = NULL | | cookiename = = NULL) {return null;        } String retvalue = null; try {for (int i = 0; i < cookielist.length; i++) {if (cOokielist[i].getname (). Equals (CookieName)) {if (isdecoder) {RetValue = Urldeco                    Der.decode (Cookielist[i].getvalue (), "UTF-8");                    } else {retvalue = Cookielist[i].getvalue ();                } break;        }}} catch (Unsupportedencodingexception e) {e.printstacktrace ();    } return RetValue; }/** * Gets the value of the cookie, * * @param request * @param cookiename * @return */public static Strin G Getcookievalue (HttpServletRequest request, String cookiename, String encodestring) {cookie[] cookielist = reques        T.getcookies ();        if (cookielist = = NULL | | cookiename = = NULL) {return null;        } String retvalue = null; try {for (int i = 0; i < cookielist.length; i++) {if (Cookielist[i].getname (). Equals (Cookie Name) {RetValue = URldecoder.decode (Cookielist[i].getvalue (), encodestring);                Break        }}} catch (Unsupportedencodingexception e) {e.printstacktrace ();    } return RetValue; }/** * Setting the value of the cookie does not set the effective time the default browser is disabled or not encoded */public static void Setcookie (HttpServletRequest request, Httpse Rvletresponse response, String cookiename, String cookievalue) {Setcookie (Request, Response, CookieName    , Cookievalue,-1); }/** * Sets the value of the cookie to take effect within a specified time, but does not encode */public static void Setcookie (HttpServletRequest request, HTTPSERVLETRESP Onse response, String cookiename, string cookievalue, int cookiemaxage) {Setcookie (Request, Response, C    Ookiename, Cookievalue, Cookiemaxage, false); }/** * Setting the value of the cookie does not set the effective time, but the encoding */public static void Setcookie (HttpServletRequest request, Httpservletrespon       SE Response, String cookiename, String Cookievalue, Boolean Isencode) { Setcookie (Request, Response, CookieName, Cookievalue,-1, Isencode); }/** * Sets the value of the cookie to take effect within a specified time, encoding parameter */public static void Setcookie (HttpServletRequest request, Httpservletres Ponse response, String cookiename, string cookievalue, int cookiemaxage, Boolean isencode) {Dosetcookie    (Request, response, CookieName, Cookievalue, Cookiemaxage, Isencode); }/** * Sets the value of the cookie to take effect within a specified time, encoding parameter (specified encoding) */public static void Setcookie (HttpServletRequest request, Httpserv Letresponse response, String cookiename, string cookievalue, int cookiemaxage, string encodestring) {do    Setcookie (Request, Response, CookieName, Cookievalue, Cookiemaxage, encodestring);  }/** * Delete cookies with cookie domain */public static void Deletecookie (HttpServletRequest request, HttpServletResponse    Response, String cookiename) {Dosetcookie (Request, Response, CookieName, "",-1, false);   }/** * Set the value of the cookie and make it effective within the specified time *   * @param the maximum number of seconds the Cookiemaxage cookie takes effect */private static final void Dosetcookie (HttpServletRequest request, Httpser Vletresponse response, String cookiename, string cookievalue, int cookiemaxage, Boolean isencode) {try            {if (Cookievalue = = null) {Cookievalue = "";            } else if (isencode) {cookievalue = Urlencoder.encode (Cookievalue, "utf-8");            } Cookie cookie = new Cookie (cookiename, cookievalue);            if (Cookiemaxage > 0) cookie.setmaxage (cookiemaxage);            if (null! = Request) {//Set the domain name of the cookie String domainName = getdomainname (request);                System.out.println (DomainName); if (! "                LocalHost ". Equals (DomainName)) {Cookie.setdomain (domainName);            }} cookie.setpath ("/");        Response.addcookie (cookie);        } catch (Exception e) {e.printstacktrace (); }    }    /** * Set the value of the cookie and make it effective within a specified time * * @param the maximum number of seconds the Cookiemaxage cookie takes effect */private static final void do Setcookie (HttpServletRequest request, httpservletresponse Response, String cookiename, string cookievalue, int            Cookiemaxage, String encodestring) {try {if (Cookievalue = = null) {Cookievalue = "";            } else {cookievalue = Urlencoder.encode (Cookievalue, encodestring);            } Cookie cookie = new Cookie (cookiename, cookievalue);            if (Cookiemaxage > 0) cookie.setmaxage (cookiemaxage);            if (null! = Request) {//Set the domain name of the cookie String domainName = getdomainname (request);                System.out.println (DomainName); if (! "                LocalHost ". Equals (DomainName)) {Cookie.setdomain (domainName);            }} cookie.setpath ("/");        Response.addcookie (cookie);    } catch (Exception e) {     E.printstacktrace (); }}/** * Gets the domain name of the cookie */private static final String Getdomainname (HttpServletRequest request) {S        Tring domainName = null;        String serverName = Request.getrequesturl (). toString ();        if (ServerName = = NULL | | servername.equals ("")) {domainName = "";            } else {serverName = Servername.tolowercase ();            ServerName = servername.substring (7);            Final int end = Servername.indexof ("/");            ServerName = servername.substring (0, end);            Final string[] domains = servername.split ("\ \");            int len = domains.length; if (Len > 3) {//www.xxx.com.cn DomainName = "." + domains[len-3] + "." + Domains[len            -2] + "." + domains[len-1]; } else if (Len <= 3 && len > 1) {//xxx.com or xxx.cn domainName = "." + DOMA            Ins[len-2] + "." + domains[len-1]; } else {domainName = ServerName; }} if (domainName! = null && domainname.indexof (":") > 0) {string[] ary = DomainName            . split ("\ \:");        DomainName = ary[0];    } return domainName; }}

Java Learning---cookie tool