转载自:https://www.cnblogs.com/kongxiaoshuang/p/6797126.html
function GUID() {
this.date = new Date();
/* 判断是否初始化过,如果初始化过以下代码,则以下代码将不再执行,实际中只执行一次 */
if (typeof this.newGUID != 'function') {
/* 生成GUID码 */
GUID.prototype.newGUID = function() {
this.date = new Date();
var guidStr = '';
sexadecimalDate = this.hexadecimal(this.getGUIDDate(), 16);
sexadecimalTime = this.hexadecimal(this.getGUIDTime(), 16);
for (var i = 0; i < 9; i++) {
guidStr += Math.floor(Math.random()*16).toString(16);
}
guidStr += sexadecimalDate;
guidStr += sexadecimalTime;
while(guidStr.length < 32) {
guidStr += Math.floor(Math.random()*16).toString(16);
}
return this.formatGUID(guidStr);
}
/*
* 功能:获取当前日期的GUID格式,即8位数的日期:19700101
*/
GUID.prototype.getGUIDDate = function() {
return this.date.getFullYear() + this.addZero(this.date.getMonth() + 1)
+ this.addZero(this.date.getDay());
}
/*
* 功能:获取当前时间的GUID格式,即8位数的时间,包括毫秒,毫秒为2位数:12300933
*/
GUID.prototype.getGUIDTime = function() {
return this.addZero(this.date.getHours()) + this.addZero(this.date.getMinutes())
+ this.addZero(this.date.getSeconds()) + this.addZero( parseInt(this.date.getMilliseconds() / 10 ));
}
/*
* 功能: 为一位数的正整数前面添加0,如果是可以转成非NaN数字的字符串也可以实现
*/
GUID.prototype.addZero = function(num) {
if (Number(num).toString() != 'NaN' && num >= 0 && num < 10) {
return '0' + Math.floor(num);
} else {
return num.toString();
}
}
/*
* 功能:将y进制的数值,转换为x进制的数值
*/
GUID.prototype.hexadecimal = function(num, x, y) {
if (y != undefined) {
return parseInt(num.toString(), y).toString(x);
} else {
return parseInt(num.toString()).toString(x);
}
}
/*
* 功能:格式化32位的字符串为GUID模式的字符串
*/
GUID.prototype.formatGUID = function(guidStr) {
var str1 = guidStr.slice(0, 8) + '-',
str2 = guidStr.slice(8, 12) + '-',
str3 = guidStr.slice(12, 16) + '-',
str4 = guidStr.slice(16, 20) + '-',
str5 = guidStr.slice(20);
return str1 + str2 + str3 + str4 + str5;
}
}
}
// 使用方法
var guid = new GUID();
alert(guid.newGUID());
来源:CSDN
作者:飞歌Fly
链接:https://blog.csdn.net/qq_35430000/article/details/80820653