生成excel列名
AZ := []string{}
a := 'A'
for i := 0; i < 26; i++ {
AZ = append(AZ, string(a+rune(i)))
}
column_num := 26 * (1 + 26)
AZPlus := []string{}
for i := 0; i < column_num; i++ {
if i < 26 {
AZPlus = append(AZPlus, AZ[i])
continue
}
u, v := i/26-1, i%26
AZPlus = append(AZPlus, AZ[u]+AZ[v])
}
A B C D...X Y Z AA AB AC AX AY AZ BA BB BC ... BX BY BZ ....ZA ZB ZC ...ZX ZY ZZ
