正则表达式以匹配xml元素中的属性名称

Question

I've the following regular expressions to match:

<string attribute=b>x</string> is matched by : (?<range3>[\w\d\-\:]+)[ ]*=[ ]*[\w\d\-\:]+

<string attribute='b'>x</string> is matched by (?<range1>[\w\d\-\:]+)[ ]*=[ ]*'[^']*'

<string attribute="b">x</string> is matched by (?<range2>[\w\d\-\:]+)[ ]*=[ ]*"[^"]*"

This works fine, however the following is also matched:

  <string>attribute=b</string>

  <string>attribute='b'</string>

  <string>attribute="b"</string>

What regular expression do I need to use to only match the first three examples?

Answer 1

    (?=\S+?>\w+<\S+?)(?<range3>[\w\d\-\:]+)[ ]*=[ ]*[\w\d\-\:]+

添加了正向前瞻以立即检查> x <.Works。