正则表达式验证URL

符合以下要求
   1：IP地址192.168.3.20
   2：www.baidu.com 、baidu.com
   3：端口 127.0.0.1:8080
   4：网址后可带中文，baidu.com/你好、baidu.com/你好/我不好
   5：网址后可带中文符号(baidu.com！)，但不能带英文符号(baidu.com!)

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