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分享正则表达式简单问题:要求字符中至少有一个数字、一个大写字母和一个小写字母的正则表达式怎么写？
要求字符中至少有一个数字、一个大写字母和一个小写字母的正则表达式怎么写？
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angelior 2003-09-15
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樓上的說完了
我來晚了
我來晚了
zhehui 2003-09-14
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http://www.aspcool.com/lanmu/browse1.asp?id=961&bbsuser=csharp
xz_king 2003-09-14
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这个用来让用户输入密码时，保证密码的安全性非常有用。如果再加上长度限制，那就太完美了。
saucer 2003-09-14
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there is probably a better way, but try to permute \d, [A-Z], and [a-z]:
\d.*[a-z].*[A-Z]|\d.*[A-Z].*[a-z]|[a-z].*\d.*[A-Z]|[a-z].*[A-Z].*\d|[A-Z].*[a-z].*\d||[A-Z].*\d.*[a-z]
or
(?=.*\d)(?=.*[a-z])(?=.*[A-Z]).*
for example
string[] slist = {"a","9","Z","a9","9Z","aA","a9Z","a**Z*9","[',9/?Z%&*z]"};
Regex re = new Regex(@"(?=.*\d)(?=.*[a-z])(?=.*[A-Z]).*");
foreach (string s in slist)
{
Console.WriteLine("{0} matches? {1}", s, re.IsMatch(s));
}
\d.*[a-z].*[A-Z]|\d.*[A-Z].*[a-z]|[a-z].*\d.*[A-Z]|[a-z].*[A-Z].*\d|[A-Z].*[a-z].*\d||[A-Z].*\d.*[a-z]
or
(?=.*\d)(?=.*[a-z])(?=.*[A-Z]).*
for example
string[] slist = {"a","9","Z","a9","9Z","aA","a9Z","a**Z*9","[',9/?Z%&*z]"};
Regex re = new Regex(@"(?=.*\d)(?=.*[a-z])(?=.*[A-Z]).*");
foreach (string s in slist)
{
Console.WriteLine("{0} matches? {1}", s, re.IsMatch(s));
}
甴曱 2003-09-14
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参考：http://expert.csdn.net/Expert/FAQ/FAQ_Index.asp?id=104752
ego 2003-09-14
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并不简单啊。帮你顶一下吧。
