如何使用正则表达式提取查询字符串值？

Question

我的字符串是：

/excursion/popupPortPOI.do?voyageCode=S515&tourCode=&travelOrder=A&portid=SYD
/excursion/popupPortPOI.do?voyageCode=S515&tourCode=&travelOrder=A&portid=BNE
/excursion/popupPortPOI.do?voyageCode=D520&tourCode=&travelOrder=A&portid=JFM
/excursion/popupPortPOI.do?voyageCode=D520&tourCode=&travelOrder=A&portid=SYD
/excursion/popupPortPOI.do?voyageCode=S517&tourCode=&travelOrder=A&portid=BNE

我对使用正则表达式提取航次代码感兴趣。在这种情况下，我会寻找它返回以下值：

S515

S515

D520

D520

S517

Answer 1

也许这个：

((?<=voyageCode=)[^=&\s]+)|((?<=portid=)[^=&\s]+)

Regex live here.