正则表达式 匹配超链接href
href="[^"]*"
 
 
匹配超链接<a>标签内
 
 
<[Aa]\s+(.*?\s+)*?href\s*=\s*(['"]).+?\2(\s+.*?\s*)*?>.+?</[Aa]>
 
 
<a class="tool-attend tool-bt-button tool-bt-attend" href="javascript:;" data-report-view='{"mod":"1592215036_002","spm":"1001.2101.3001.4232","extend1":"关注"}'>关注</a>
 
 
匹配http
[^\\=](http://[A-Za-z0-9\\.\\/=\\?%\\-\\_\\&~`@':+!(^\\<)]+)