Regex xml中的多行匹配模式

如何匹配以下模式：

<aaa class = "dog">
   <bbb id = "one"/>
</aaa>
<aaa class = "dog">
   <bbb id = "two"/>
</aaa>
<aaa class = "dog">
   <bbb id = "three"/>
</aaa>

但它符合：

<aaa class = "dog">
   <bbb id = "one"/>
</aaa>
<aaa class = "dog">
   <bbb id = "two"/>
</aaa>
<aaa class = "dog">
   <bbb id = "three

如果要匹配上述三行，可以使用以下正则表达式：

<aaa class = "dog">[\r\n\t\s]*<bbb id = "three"/>[\r\n\t\s]*</aaa>

[\r\n\t\s]*[\r\n\t\s]*
由于您的正则表达式以（三）结尾，它肯定会匹配到“三”。您想匹配准确的文本吗？实际上，我希望它匹配“我想要：”中所述的三行，即
和
静态？例如，你能使用
^
？我想要的是全部三行：
<aaa class = "dog">
   <bbb id = "one"/>
</aaa>
<aaa class = "dog">
   <bbb id = "two"/>
</aaa>
<aaa class = "dog">
   <bbb id = "three

<aaa class = "dog">[\r\n\t\s]*<bbb id = "three"/>[\r\n\t\s]*</aaa>