randomStr static method

String randomStr({
  1. int length = 32,
  2. String? prefix,
})

指定字符中生成指定长度的随机字符串 prefix前缀

  KRandomUtils.randomStr(prefix: "999999") => 999999o6gO4YRfHz6PCpjzA9eYBgWdKH

Implementation

static String randomStr({int length = 32, String? prefix}) {
  var len = length - (prefix?.length ?? 0);
  final randomStr = List.generate(len,
          (index) => _availableChars[_random.nextInt(_availableChars.length)])
      .join();
  if (prefix.kisNotNull()) {
    return "$prefix$randomStr";
  } else {
    return randomStr;
  }
}