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// 参数：length 想要的随机字符串的长度
function getRandomString(length) {
var length = length || 32;
var str = '0123456789QWERTYUIOPASDFGHJKLZXCVBNM';
var reStr = ';
for (var i = 0; i < length; i++) {
var random = parseInt(Math.random() * 36);
console.log(str[random])
reStr += str[random]
}
console.log(reStr)
}
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