javaweb项目前后端cookie工具
后端设置cookie的工具类 ：
前端获取后端的cookie值
通过EL表达式${cookie.key.value}
package com.gmsp.util.cookie; 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 工具类 * */ public final class CookieUtils { /** * 得到Cookie的值, 不编码 * * @param request * @param cookieName * @return */ public static String getCookieValue(HttpServletRequest request, String cookieName) { return getCookieValue(request, cookieName, false); } /** * 得到Cookie的值, * * @param request * @param cookieName * @return */ public static String 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 = URLDecoder.decode(cookieList[i].getValue(), "UTF-8"); } else { retValue = cookieList[i].getValue(); } break; } } } catch (UnsupportedEncodingException e) { e.printStackTrace(); } return retValue; } /** * 得到Cookie的值 （自定义编码格式）, * * @param request * @param cookieName * @return */ public static String getCookieValue(HttpServletRequest request, String cookieName, String encodeString) { 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)) { retValue = URLDecoder.decode(cookieList[i].getValue(), encodeString); break; } } } catch (UnsupportedEncodingException e) { e.printStackTrace(); } return retValue; } /** * 设置Cookie的值 不设置生效时间默认浏览器关闭即失效,也不编码 */ public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName, String cookieValue) { setCookie(request, response, cookieName, cookieValue, -1); } /** * 设置Cookie的值 在指定时间内生效,但不编码 */ public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName, String cookieValue, int cookieMaxage) { setCookie(request, response, cookieName, cookieValue, cookieMaxage, false); } /** * 设置Cookie的值 不设置生效时间,但编码 */ public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName, String cookieValue, boolean isEncode) { setCookie(request, response, cookieName, cookieValue, -1, isEncode); } /** * 设置Cookie的值 在指定时间内生效, 编码参数 */ public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName, String cookieValue, int cookieMaxage, boolean isEncode) { doSetCookie(request, response, cookieName, cookieValue, cookieMaxage, isEncode); } /** * 设置Cookie的值 在指定时间内生效, 编码参数(指定编码) */ public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName, String cookieValue, int cookieMaxage, String encodeString) { doSetCookie(request, response, cookieName, cookieValue, cookieMaxage, encodeString); } /** * 删除Cookie带cookie域名 */ public static void deleteCookie(HttpServletRequest request, HttpServletResponse response, String cookieName) { doSetCookie(request, response, cookieName, "", -1, false); } /** * 设置Cookie的值，并使其在指定时间内生效 * * @param cookieMaxage cookie生效的最大秒数 */ private static final void doSetCookie(HttpServletRequest request, HttpServletResponse 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) {// 设置域名的cookie String domainName = getDomainName(request); System.out.println(domainName); if (!"localhost".equals(domainName)&&"127.0.0.1".equals(domainName)) { cookie.setDomain(domainName); } } cookie.setPath("/"); response.addCookie(cookie); } catch (Exception e) { e.printStackTrace(); } } /** * 设置Cookie的值，并使其在指定时间内生效 * * @param cookieMaxage cookie生效的最大秒数 */ private static final void doSetCookie(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) {// 设置域名的cookie String domainName = getDomainName(request); System.out.println(domainName); if (!"localhost".equals(domainName)&&"127.0.0.1".equals(domainName)) { cookie.setDomain(domainName); } } cookie.setPath("/"); response.addCookie(cookie); } catch (Exception e) { e.printStackTrace(); } } /** * 得到cookie的域名 */ private static final String getDomainName(HttpServletRequest request) { String 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 = "." + domains[len - 2] + "." + domains[len - 1]; } else { domainName = serverName; } } if (domainName != null && domainName.indexOf(":") > 0) { String[] ary = domainName.split("\\:"); domainName = ary[0]; } return domainName; } }
前端JS设置cookie：
设置和加入cookie的方法
cookie.set(key,value);
cookie.get(key);
var cookie = { set:function(key,val,time){//设置cookie方法 var date=new Date(); //获取当前时间 var expiresDays=time; //将date设置为n天以后的时间 date.setTime(date.getTime()+expiresDays*24*3600*1000); //格式化为cookie识别的时间 document.cookie=key + "=" + escape(val) +";expires="+date.toGMTString(); //设置cookie }, get:function(key){//获取cookie方法 /*获取cookie参数*/ var getCookie = document.cookie.replace(/[ ]/g,""); //获取cookie，并且将获得的cookie格式化，去掉空格字符 var arrCookie = getCookie.split(";") //将获得的cookie以"分号"为标识 将cookie保存到arrCookie的数组中 var tips; //声明变量tips for(var i=0;i<arrCookie.length;i++){ //使用for循环查找cookie中的tips变量 var arr=arrCookie[i].split("="); //将单条cookie用"等号"为标识，将单条cookie保存为arr数组 if(key==arr[0]){ //匹配变量名称，其中arr[0]是指的cookie名称，如果该条变量为tips则执行判断语句中的赋值操作 tips=arr[1]; //将cookie的值赋给变量tips break; //终止for循环遍历 } } return unescape(tips); }, del:function(key){ //删除cookie方法 var date = new Date(); //获取当前时间 date.setTime(date.getTime()-10000); //将date设置为过去的时间 document.cookie = key + "=v; expires =" +date.toGMTString();//设置cookie } }
