参考文章出处
createCol(n: number) {const ordA = 'A'.charCodeAt(0)const ordZ = 'Z'.charCodeAt(0)const len = ordZ - ordA + 1let str = ""while (n >= 0) {str = String.fromCharCode(n % len + ordA) + strn = Math.floor(n / len) - 1}return str}