JavaScript正则表达式验证密码具有特殊字符(Javascript regular expre

我试图验证使用正则表达式的密码。如果我们拥有所有的字符字母密码得到更新。我在哪里去了？正则表达式吧？

function validatePassword() {
    var newPassword = document.getElementById('changePasswordForm').newPassword.value;
    var minNumberofChars = 6;
    var maxNumberofChars = 16;
    var regularExpression  = /^[a-zA-Z0-9!@#$%^&*]{6,16}$/;
    alert(newPassword); 
    if(newPassword.length < minNumberofChars || newPassword.length > maxNumberofChars){
        return false;
    }
    if(!regularExpression.test(newPassword)) {
        alert("password should contain atleast one number and one special character");
        return false;
    }
}

Answer 1:

使用积极的前瞻断言：

var regularExpression = /^(?=.*[0-9])(?=.*[!@#$%^&*])[a-zA-Z0-9!@#$%^&*]{6,16}$/;

没有它，你的正则表达式目前只匹配你有6至16个有效字符，它不会验证它至少有一个数字，至少一个特殊字符。这就是上述的前瞻是。

(?=.*[0-9]) -断言一个串具有至少一个数目;
(?=.*[!@#$%^&*]) -断言的字符串至少有一个特殊字符。

Answer 2:

function validatePassword() {
    var p = document.getElementById('newPassword').value,
        errors = [];
    if (p.length < 8) {
        errors.push("Your password must be at least 8 characters"); 
    }
    if (p.search(/[a-z]/i) < 0) {
        errors.push("Your password must contain at least one letter.");
    }
    if (p.search(/[0-9]/) < 0) {
        errors.push("Your password must contain at least one digit."); 
    }
    if (errors.length > 0) {
        alert(errors.join("\n"));
        return false;
    }
    return true;
}

有下面的答案，因为它不会因缺少[同时检查字母和数字]检查整个字符串一定的问题，这是正确的版本

Answer 3:

你可以让你自己的正则表达式JavaScript验证

    /^            : Start
    (?=.{8,})        : Length
    (?=.*[a-zA-Z])   : Letters
    (?=.*\d)         : Digits
    (?=.*[!#$%&? "]) : Special characters
    $/              : End



        (/^
        (?=.*\d)                //should contain at least one digit
        (?=.*[a-z])             //should contain at least one lower case
        (?=.*[A-Z])             //should contain at least one upper case
        [a-zA-Z0-9]{8,}         //should contain at least 8 from the mentioned characters

        $/)

Example:-   /^(?=.*\d)(?=.*[a-zA-Z])[a-zA-Z0-9]{7,}$/

Answer 4:

我用分8字母密码下面的脚本，与至少一个符号，大写和小写字母和一个数字

function checkPassword(str)
{
    var re = /^(?=.*\d)(?=.*[!@#$%^&*])(?=.*[a-z])(?=.*[A-Z]).{8,}$/;
    return re.test(str);
}

Answer 5:

不要试图做太多一步到位。保持每个规则分开。

function validatePassword() {
    var p = document.getElementById('newPassword').value,
        errors = [];
    if (p.length < 8) {
        errors.push("Your password must be at least 8 characters");
    }
    if (p.search(/[a-z]/i) < 0) {
        errors.push("Your password must contain at least one letter."); 
    }
    if (p.search(/[0-9]/) < 0) {
        errors.push("Your password must contain at least one digit.");
    }
    if (errors.length > 0) {
        alert(errors.join("\n"));
        return false;
    }
    return true;
}

Answer 6:

如果您检查长度seperately，你可以做到以下几点：

var regularExpression  = /^[a-zA-Z]$/;

if (regularExpression.test(newPassword)) {
    alert("password should contain atleast one number and one special character");
    return false;
}