示例：js使用正则表达式group来提取字符串中的数据

var linkStr = "/black-mountain/35-cotton-creek-cir-black-mountain-nc-421_537763.html";// 括号表示组。访问可以用group[index]来访问每组的信息var linkRegx = /\/([^\/]+)\/.+-(\d+)_(\d+).html/;var group = linkStr.match(linkRegx);console.log(group);/*输出结果为：[ '/black-mountain/35-cotton-creek-cir-black-mountain-nc-421_537763.html',  'black-mountain',  '421',  '537763',  index: 0,  input: '/black-mountain/35-cotton-creek-cir-black-mountain-nc-421_537763.html' ]*/