有很多办法, 例如下面的代码
算法一:
function uuid() {var s = []
var hexDigits = "0123456789abcdef"
for (var i = 0 i < 36 i++) {
s[i] = hexDigits.substr(Math.floor(Math.random() * 0x10), 1)
}
s[14] = "4" // bits 12-15 of the time_hi_and_version field to 0010
s[19] = hexDigits.substr((s[19] & 0x3) | 0x8, 1) // bits 6-7 of the clock_seq_hi_and_reserved to 01
s[8] = s[13] = s[18] = s[23] = "-"
var uuid = s.join("")
return uuid
}
算法二:
function guid() {return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
var r = Math.random()*16|0, v = c == 'x' ? r : (r&0x3|0x8)
return v.toString(16)
})
}
算法三:
function guid() {function S4() {
return (((1+Math.random())*0x10000)|0).toString(16).substring(1)
}
return (S4()+S4()+"-"+S4()+"-"+S4()+"-"+S4()+"-"+S4()+S4()+S4())
}
等等
可以用这个方法
function generateUUID() {var d = new Date().getTime(),
uuid = 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
var r = (d + Math.random()*16)%16 | 0
d = Math.floor(d/16)
return (c=='x' ? r : (r&0x3|0x8)).toString(16)
})
return uuid
}