js验证密码的正则表达式 JavaScript怎么写验证密码的正则表达式？
js\u9a8c\u8bc1\u5bc6\u7801\u7684\u6b63\u5219\u8868\u8fbe\u5f0f\u3002\u5b8c\u6574\u7684js\u6b63\u5219\u8868\u8fbe\u5f0f\uff1a
//\u5f3a\uff1a\u5b57\u6bcd+\u6570\u5b57+\u7279\u6b8a\u5b57\u7b26
^(?![a-zA-z]+$)(?!\d+$)(?![!@#$%^&*]+$)(?![a-zA-z\d]+$)(?![a-zA-z!@#$%^&*]+$)(?![\d!@#$%^&*]+$)[a-zA-Z\d!@#$%^&*]+$ //\u4e2d\uff1a\u5b57\u6bcd+\u6570\u5b57\uff0c\u5b57\u6bcd+\u7279\u6b8a\u5b57\u7b26\uff0c\u6570\u5b57+\u7279\u6b8a\u5b57\u7b26
^(?![a-zA-z]+$)(?!\d+$)(?![!@#$%^&*]+$)[a-zA-Z\d!@#$%^&*]+$
//\u5f31\uff1a\u7eaf\u6570\u5b57\uff0c\u7eaf\u5b57\u6bcd\uff0c\u7eaf\u7279\u6b8a\u5b57\u7b26^(?:\d+|[a-zA-Z]+|[!@#$%^&*]+)$
//\u6821\u9a8c\u662f\u5426\u5168\u7531\u6570\u5b57\u7ec4\u6210function isDigit(s){var patrn=/^[0-9]{1,20}$/;if (!patrn.exec(s)) return falsereturn true
}//\u6821\u9a8c\u767b\u5f55\u540d\uff1a\u53ea\u80fd\u8f93\u51655-20\u4e2a\u4ee5\u5b57\u6bcd\u5f00\u5934\u3001\u53ef\u5e26\u6570\u5b57\u3001\u201c_\u201d\u3001\u201c.\u201d\u7684\u5b57\u4e32function isRegisterUserName(s){var patrn=/^[a-zA-Z]{1}([a-zA-Z0-9]|[._]){4,19}$/;if (!patrn.exec(s)) return falsereturn true}function isRegisterUserName(s){var patrn=/^[a-zA-Z]{1}([a-zA-Z0-9]|[._]){4,19}$/;if (!patrn.exec(s)) return falsereturn true}
//\u6821\u9a8c\u7528\u6237\u59d3\u540d\uff1a\u53ea\u80fd\u8f93\u51651-30\u4e2a\u4ee5\u5b57\u6bcd\u5f00\u5934\u7684\u5b57\u4e32Javascript\u4ee3\u7801function isTrueName(s){var patrn=/^[a-zA-Z]{1,30}$/;if (!patrn.exec(s)) return falsereturn true}}}//\u6821\u9a8c\u5bc6\u7801\uff1a\u53ea\u80fd\u8f93\u51656-20\u4e2a\u5b57\u6bcd\u3001\u6570\u5b57\u3001\u4e0b\u5212\u7ebf
function isPasswd(s){var patrn=/^(\w){6,20}$/;if (!patrn.exec(s)) return falsereturn true}//\u6821\u9a8c\u666e\u901a\u7535\u8bdd\u3001\u4f20\u771f\u53f7\u7801\uff1a\u53ef\u4ee5\u201c+\u201d\u5f00\u5934\uff0c\u9664\u6570\u5b57\u5916\uff0c\u53ef\u542b\u6709\u201c-\u201d
function isTel(s){//var patrn=/^[+]{0,1}(\d){1,3}[ ]?([-]?(\d){1,12})+$/;var patrn=/^[+]{0,1}(\d){1,3}[ ]?([-]?((\d)|[ ]){1,12})+$/;if (!patrn.exec(s)) return falsereturn true}//\u6821\u9a8c\u624b\u673a\u53f7\u7801\uff1a\u5fc5\u987b\u4ee5\u6570\u5b57\u5f00\u5934\uff0c\u9664\u6570\u5b57\u5916\uff0c\u53ef\u542b\u6709\u201c-\u201d
function isMobil(s){var patrn=/^[+]{0,1}(\d){1,3}[ ]?([-]?((\d)|[ ]){1,12})+$/;if (!patrn.exec(s)) return falsereturn true}//\u6821\u9a8c\u90ae\u653f\u7f16\u7801
function isPostalCode(s){//var patrn=/^[a-zA-Z0-9]{3,12}$/;var patrn=/^[a-zA-Z0-9 ]{3,12}$/;if (!patrn.exec(s)) return falsereturn true}//\u6821\u9a8c\u641c\u7d22\u5173\u952e\u5b57
function isSearch(s){var patrn=/^[^`~!@#$%^&*()+=|\\\][\]\{\}:;'\,./?]{1}[^`~!@$%^&()+=|\\\][\]\{\}:;'\,.?]{0,19}$/;if (!patrn.exec(s)) return falsereturn true}function isIP(s) //by zergling{var patrn=/^[0-9.]{1,20}$/;if (!patrn.exec(s)) return falsereturn true}
\u3000\u3000/^(([A-Z])+|([a-z]+)|(\d+))$/.test("aaaaaaa")
\u6216\u8005
/^(([A-Z])+|([a-z]+)|(\d+))$/.test("AABBBB")
\u6216\u8005
/^(([A-Z])+|([a-z]+)|(\d+))$/.test("1111111")
\u90fd\u4f1a\u8fd4\u56detrue
\u8fd4\u56detrue\u5c31\u662f\u5bc6\u7801\u4e0d\u7b26\u5408\u89c4\u5219\u3002
/^(([A-Z])+|([a-z]+)|(\d+))$/.test("121AAV")
\u8fd9\u6837\u8fd4\u56defalse\u7684\u5c31\u662f\u9a8c\u8bc1\u901a\u8fc7\u7684
完整的js正则表达式：
//强：字母+数字+特殊字符
//中：字母+数字，字母+特殊字符，数字+特殊字符
^(?![a-zA-z]+$)(?!\d+$)(?![!@#$%^&*]+$)[a-zA-Z\d!@#$%^&*]+$
//弱：纯数字，纯字母，纯特殊字符^(?:\d+|[a-zA-Z]+|[!@#$%^&*]+)$
//校验是否全由数字组成function isDigit(s){var patrn=/^[0-9]{1,20}$/;if (!patrn.exec(s)) return falsereturn true
}//校验登录名：只能输入5-20个以字母开头、可带数字、“_”、“.”的字串function isRegisterUserName(s){var patrn=/^[a-zA-Z]{1}([a-zA-Z0-9]|[._]){4,19}$/;if (!patrn.exec(s)) return falsereturn true}function isRegisterUserName(s){var patrn=/^[a-zA-Z]{1}([a-zA-Z0-9]|[._]){4,19}$/;if (!patrn.exec(s)) return falsereturn true}
//校验用户姓名：只能输入1-30个以字母开头的字串Javascript代码function isTrueName(s){var patrn=/^[a-zA-Z]{1,30}$/;if (!patrn.exec(s)) return falsereturn true}}}//校验密码：只能输入6-20个字母、数字、下划线
function isPasswd(s){var patrn=/^(\w){6,20}$/;if (!patrn.exec(s)) return falsereturn true}//校验普通电话、传真号码：可以“+”开头，除数字外，可含有“-”
function isTel(s){//var patrn=/^[+]{0,1}(\d){1,3}[ ]?([-]?(\d){1,12})+$/;var patrn=/^[+]{0,1}(\d){1,3}[ ]?([-]?((\d)|[ ]){1,12})+$/;if (!patrn.exec(s)) return falsereturn true}//校验手机号码：必须以数字开头，除数字外，可含有“-”
function isMobil(s){var patrn=/^[+]{0,1}(\d){1,3}[ ]?([-]?((\d)|[ ]){1,12})+$/;if (!patrn.exec(s)) return falsereturn true}//校验邮政编码
function isPostalCode(s){//var patrn=/^[a-zA-Z0-9]{3,12}$/;var patrn=/^[a-zA-Z0-9 ]{3,12}$/;if (!patrn.exec(s)) return falsereturn true}//校验搜索关键字
function isSearch(s){var patrn=/^[^`~!@#$%^&*()+=|\\\][\]\{\}:;'\,.<>/?]{1}[^`~!@$%^&()+=|\\\][\]\{\}:;'\,.<>?]{0,19}$/;if (!patrn.exec(s)) return falsereturn true}function isIP(s) //by zergling{var patrn=/^[0-9.]{1,20}$/;if (!patrn.exec(s)) return falsereturn true}以下是验证密码的正则表达式，其要求包含其中任意两种类型：数字、小写字母、大写字母、特殊字符（~!@#$%^\u0026*()_-+=）。``` ^(?=.*\\d)(?=.*[a-z])(?=.*[A-Z])(?=.*[~!@#$%^\u0026*()_-+=]).{8,20}$ ```解释：- `^` 开始匹配- `(?=.*\\d)` 匹配任意数字- `(?=.*[a-z])` 匹配任意小写字母- `(?=.*[A-Z])` 匹配任意大写字母- `(?=.*[~!@#$%^\u0026*()_-+=])` 匹配任意特殊字符- `.{8,20}` 匹配长度在 8-20 之间的任意字符- `$` 结束匹配其中 `(?=.*…)`表示零宽度正预测先行断言，也就是向前检查是否有某种字符。
<p>
密码<input type="password" id=“pwd”>
</p>
验证密码就：
var pwd=docment.getElementById("pwd").value; //获取密码框里的元素
var reg="这里写你要求密码的正则表达式格式"；
//例如密码要求5-10位字母数字下划线,那么正则式就是 var reg=/^\w{5,10}$/; (记住^开始和$不要漏了)
if(reg.test(pwd)){
return true;
)
var pa=/^(?=.{6,16}$)(?![0-9]+$)(?!.*(.).*\1)[0-9a-zA-Z]+$/;
把你允许的特殊字符放到[0-9a-zA-Z] 中
<script>
var userName='testName';//用户名
var t1="a-z",t2="A-Z",t3="0-9",t4="!@#%";//有什么特殊符号，修改T4的值
var r0="(?!.*"+userName+".*)",r1="(?=.*["+t1+"]+)",r2="(?=.*["+t2+"]+)",r3="(?=.*["+t3+"]+)",r4="(?=.*["+t4+"]+)";
var s1=r1+r2+r3+"["+t1+t2+t3+"]+",s2=r1+r2+r4+"["+t1+t2+t4+"]+",s3=r1+r3+r4+"["+t1+t3+t4+"]+",s4=r2+r3+r4+"["+t2+t3+t4+"]+",s5=r1+r2+r3+r4+"["+t1+t2+t3+t4+"]+";
var r=new RegExp("^"+r0+"(?:(?:"+s1+")|(?:"+s2+")|(?:"+s3+")|(?:"+s4+")|(?:"+s5+"))"+"$");
document.write(r + "<br/>");
document.write(r.test("asdf@#234AA"+userName+"234adfwe") + "<br/>");//false 因为包含用户名
document.write(r.test("1111111aaaaa") + "<br/>");//false 因为值满足2个条件
document.write(r.test("aaaaaAAAA") + "<br/>");//false 因为值满足2个条件
document.write(r.test("aaaaa!@#") + "<br/>");//false 因为值满足2个条件
document.write(r.test("aaaaa!@#11123") + "<br/>");//true
</script>
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绛旓細/^(?=.*\d)(?=.*[a-zA-Z]).{5,20}$/
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