基于jQuery+Cookie实现的防止刷新的在线考试倒计时
if(!hasSetCookie()){
addCookie("${examinee.examineeId}",_expiresHours,_expiresHours);
}
settime($("#remainTime"));
});
function hasSetCookie(){
var strCookie = document.cookie;
var arrCookie = strCookie.split("; ");
for (var i = 0; i < arrCookie.length; i++) {
var arr = arrCookie[i].split("=");
if (arr[0] == "${examinee.examineeId}") {
return true;
}
};
return false;
}
//开始倒计时
function settime(remainTime) {
var _time = getCookieValue("871d31bacfd4451484c5f70f8860c2a9");
var _countdown = parseInt(getCookieValue("${examinee.examineeId}")) / 1000;
if (_countdown <= 0) {
alert("考试时间到！");
endExam();
} else {
var _second = _countdown % 60;
var _minute = parseInt(_countdown / 60) % 60;
var _hour = parseInt(parseInt(_countdown / 60) / 60);
if (_hour < 10)
_hour = "0" + _hour.toString();
if (_second < 10)
_second = "0" + _second.toString();
if (_minute < 10)
_minute = "0" + _minute.toString();
remainTime.html(_hour + ":" + _minute + ":" + _second);
_countdown--;
editCookie("${examinee.examineeId}",_countdown * 1000,_countdown * 1000);
}
//每1000毫秒执行一次
setTimeout(function() {
settime(remainTime);
},1000);
};
//时添加cookie
function addCookie(name,value,expiresHours) {
var cookieString = name + "=" + escape(value); //escape() 函数可对字符串进行编码，这样就可以在所有的计算机上读取该字符串。
//判断是否设置过期时间,0代表关闭浏览器时失效
if (expiresHours > 0) {
var date = new Date();
date.setTime(date.getTime() + expiresHours * 1000);
cookieString = cookieString + ";expires=" + date.toUTCString();
}
document.cookie = cookieString;
}
//<a href="https://www.jb51.cc/tag/xiugai/" target="_blank" class="keywords">修改</a>cookie的值
function editCookie(name,expiresHours) {
var cookieString = name + "=" + escape(value);
if (expiresHours > 0) {
var date = new Date();
date.setTime(date.getTime() + expiresHours * 1000); //单位是毫秒
cookieString = cookieString + ";expires=" + date.toGMTString();
}
document.cookie = cookieString;
}
//根据名字<a href="https://www.jb51.cc/tag/huoqu/" target="_blank" class="keywords">获取</a>cookie的值
function getCookieValue(name) {
var strCookie = document.cookie;
var arrCookie = strCookie.split("; ");
for (var i = 0; i < arrCookie.length; i++) {
var arr = arrCookie[i].split("=");
if (arr[0] == name) {
return unescape(arr[1]);
break;
} else {
continue;
};
};
}
以上所述就是本文的全部内容了，希望大家能够喜欢。
原文链接：https://www.f2er.com/jquery/53749.html