进制A~Z，全字母26进制转化

public String to26( int x ) {
StringBuffer sBuffer = new StringBuffer();
int cur;
x++;
while( x > 0 ) {
sBuffer.append((char)( (( cur = x % 26 ) == 0 ? 25 : cur - 1) + 'A') );
x /= 26;
if( cur == 0 ) x--;
}
sBuffer.reverse();
return sB　uffer.toString();
}

private intto10( String lcn ) {
int x = 0;
int index = 0;
StringBuffer sBuffer = new StringBuffer();
for( ; index < lcn.length(); index++ ) {
char ch = lcn.charAt(index);
if( ch < 'A') break;
sBuffer.append(ch);
}
sBuffer.reverse();
for( int offset = 0; offset < sBuffer.length(); offset++ ) {
x += (sBuffer.charAt(offset) - 'A' + 1) * Math.pow( 26, offset);
}
x--;
return x;
}