正则表达式匹配xml元素中的属性名称

Question

我要匹配以下正则表达式：

<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\-\:]+)[ ]*=[ ]*"[^"]*"

这工作正常，但以下也匹配：

  <string>attribute=b</string>

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

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

我需要使用哪些正则表达式仅匹配前三个示例？

Answer 1

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

添加了一个积极的预测，以检查＆gt; x＆lt; .Works now。