cookie知识点
Posted magicasa
tags:
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1.springmvc框架中,cookie例子
jsp:
<%-- Created by IntelliJ IDEA. User: 44262 Date: 2019/2/28 Time: 18:49 To change this template use File | Settings | File Templates. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>Title</title> </head> <body> <h1>增加</h1> <form action="/Common/addCookie.do"> 用户名：<input type="text" name="uname"> <br/> 值：<input type="text" name="value"> <input type="submit" value="提交"/> </form> <h1>修改</h1> <form action="/Common/editCookie.do"> 用户名：<input type="text" name="uname"> <br/> 值：<input type="text" name="value"> <input type="submit" value="提交"/> </form> <h1>删除</h1> <form action="/Common/delCookie.do"> 用户名：<input type="text" name="uname"> <br/> <input type="submit" value="提交"/> </form> <h1>查询</h1> <a href="${pageContext.request.contextPath }/Common/showCookies.do">查询</a><br> </body> <scipt> </scipt> </html>
后台:
@RequestMapping("/showCookies.do")
@ResponseBody
public void showCookies(HttpServletRequest request, HttpServletResponse response) throws IOException {
Cookie[] cookies = request.getCookies();//这样便可以获取一个cookie数组
if (null == cookies) {
System.out.println("没有cookie=========");
} else {
for (Cookie cookie : cookies) {
System.out.println("name:" + cookie.getName() + ",value:" + cookie.getValue());
}
}
}
@RequestMapping(value = "/addCookie.do", produces = "application/json; charset=utf-8")
public void addCookie(HttpServletResponse response, String uname, String value) throws IOException {
Cookie cookie = new Cookie(uname.trim(), value.trim());
cookie.setMaxAge(30 * 60);// 设置为30min
cookie.setPath("/");//可在同一应用服务器内共享cookie的方法
System.out.println("已添加===============");
response.addCookie(cookie);
}
//注意一、修改、删除Cookie时，新建的Cookie除value、maxAge之外的所有属性，例如name、path、domain等，都要与原Cookie完全一样。否则，浏览器将视为两个不同的Cookie不予覆盖，导致修改、删除失败。
@RequestMapping(value = "/editCookie.do", produces = "application/json; charset=utf-8")
public void editCookie(HttpServletRequest request, HttpServletResponse response, String uname, String value) throws IOException {
Cookie[] cookies = request.getCookies();
if (null == cookies) {
System.out.println("没有cookie==============");
} else {
for (Cookie cookie : cookies) {
if (cookie.getName().equals(uname)) {
System.out.println("原值为:" + cookie.getValue());
cookie.setValue(value);
cookie.setPath("/");
cookie.setMaxAge(30 * 60);// 设置为30min
System.out.println("被修改的cookie名字为:" + cookie.getName() + ",新值为:" + cookie.getValue());
response.addCookie(cookie);
break;
}
}
}
}
@RequestMapping(value = "/delCookie.do", produces = "application/json; charset=utf-8")
public void delCookie(HttpServletRequest request, HttpServletResponse response, String uname) throws IOException {
Cookie[] cookies = request.getCookies();
if (null == cookies) {
System.out.println("没有cookie==============");
} else {
for (Cookie cookie : cookies) {
if (cookie.getName().equals(uname)) {
//找到一样的cookie设置value的值 再覆盖
cookie.setValue(null);
cookie.setMaxAge(0);// 立即销毁cookie
cookie.setPath("/");
System.out.println("被删除的cookie名字为:"+cookie.getName());
response.addCookie(cookie);
break;
}
}
}
}
@RequestMapping("/testCookie")
public String testCookie(@CookieValue(value="name",required=false) String name,
@CookieValue(value="age",required=false) Integer age){
System.out.println(name+","+age);
return "hello";
}
3.根据时间封装和删除cookie
//设置 */function setCookie(key, value, iDay) { var oDate = new Date(); oDate.setDate(oDate.getDate() + iDay); document.cookie = key + ‘=‘ + value + ‘;expires=‘ + oDate; } //移除 function removeCookie(key) { setCookie(key, ‘‘, -1);//这里只需要把Cookie保质期退回一天便可以删除}function getCookie(key) { var cookieArr = document.cookie.split(‘; ‘);
for(var i = 0; i < cookieArr.length; i++) {
var arr = cookieArr[i].split(‘=‘);
if(arr[0] === key) {
return arr[1]; } } return false; }
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