如何重构以下代码，使其更简洁、更易于维护？if($row['vocation']==1)$vocation="sorcerer";if($row['vocation']==2)$vocation="druid";if($row['vocation']==3)$vocation="paladin";if($row['vocation']==4)$vocation="knight";if($row['vocation']==5)$vocation="mastersorcerer";if($row['vocation']==6)$vocation="elderdruid";if($row['