求一个正则表达式，java用，密码只能为6-16位数字或英文字母(区分大小写)。 写一个正则：由6~16位数字、字母或常用符号的组合密码，不能...
java\u5bc6\u7801\u6b63\u5219\u8868\u8fbe\u5f0f\uff08\u53ef\u4ee5\u662f\u7eaf\u6570\u5b57\uff0c\u4e5f\u53ef\u4ee5\u662f\u7eaf\u5b57\u6bcd\uff0c\u4e5f\u53ef\u4ee5\u662f\u6570\u5b57+\u5b57\u6bcd,6-16 \u4f4d\uff09^[0-9a-zA-Z]{6,16}$
[a-z0-9A-Z]\u8868\u793a\u662f\u5b57\u6bcd\u6216\u6570\u5b57
{6, 16}\u8868\u793a\u91cd\u590d\u51fa\u73b06~16\u6b21
^\u8868\u793a\u4ece\u5b57\u7b26\u4e32\u5934\u5f00\u59cb\u5339\u914d
$\u8868\u793a\u5339\u914d\u5230\u5b57\u7b26\u4e32\u672b\u5c3e
\u5982\u679c\u4e0d\u52a0^\u548c$\u5b57\u7b26\u4e32\u4e2d\u5982\u679c\u6709\u7b26\u5408\u6761\u4ef6\u7684\u4e32\u4e5f\u4f1a\u88ab\u5339\u914d
1 \u4e00\u6b65\u5230\u4f4d\u6b63\u5219\u8868\u8fbe\u5f0f\uff1a
(?=.*[0-9])(?=.*[a-z])(?=.*[!@#$%^&*])(?=.*[A-Z]).{6,16}
2\u8fd9\u662f\u7a77\u4e3e\u6cd5\u5199\u7684\u6b63\u5219\uff1a
$a = '[a-z]+';
$b = '[0-9]+';
$c = '[-+_!@#$%^&*()]+';
$p = "/$a$b$c|$a$c$b|$b$a$c|$b$c$a|$c$a$b|$c$b$a/";
3\u8fd9\u662f\u4e00\u4e2a\u7528js\u65b9\u6cd5\u5199\u7684\u9a8c\u8bc1\uff1a
var strPassword =document.getElementById("user_userpass").value;
var num=0;
if(strPassword.search(/[A-Z]/)!=-1)
{
num+=1;
}
if(strPassword.search(/[0-9]/)!=-1)
{
num+=1;
}
if(strPassword.search(/[a-z]/)!=-1)
{
num+=1;
}
if(strPassword.search(/[^A-Za-z0-9]/)!=-1)
{
num+=1;
}
if(num>=2 && (strPassword.length>=6 && strPassword.length<=16 ))
{
alert\uff08\u201cy\u201d\uff09\uff1b
}
else
{
alert\uff08\u201cn\u201d\uff09\uff1b
}
[0-9a-zA-Z]{6,16}
就可以了
[0-9a -zA -Z]{6,16}
"[a-zA-Z][a-zA-Z0-9]{5,15}" //前面[a-zA-Z]表示第一位必须英文开头
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