import ‘dart:math‘;
/// dart  生成固定隨機數
void main(){
  String alphabet = ‘qwertyuiopasdfghjklzxcvbnmQWERTYUIOPASDFGHJKLZXCVBNM‘;
  int strlenght = 30; /// 生成的字符串固定長度
  String left = ‘‘;
  for (var i = 0; i < strlenght; i++) {
//    right = right + (min + (Random().nextInt(max - min))).toString();
    left = left + alphabet[Random().nextInt(alphabet.length)];
  }
print(left);
}
 

效果：

Dart生成固定長度隨機數