允许数字、空格、加号、连字符和括号的正则表达式

问题描述

我正在使用 jquery 验证器，其中我添加了一种方法来验证只允许数字、空格、加号、连字符和括号的字符串.字符串中的数字是强制性的，但其他承租人是可选的.

I am using jquery validator where I have added a method to validate a string which allow only numbers, spaces, plus sign, hyphen and brackets. Number is mandatory in the string but other charterer is optional.

我在 jquery 验证器中添加方法的代码:

My code for adding method in jquery validor:

jQuery.validator.addMethod( "regex", function(value, element, regexp) {
        var re = new RegExp(regexp);
        return this.optional(element) || re.test(value);
    },
    "Please check your input."
);

规则代码如下:

rules: {
myfield: {
    required: true,
    regex: "[0-9]+" // want to add regular expression but I wrote only for digit which works but do not understand how to reach at my requirements.
 },
}

推荐答案

你可以将需要的字符添加到字符类中

You can add the required characters into character class as

/^(?=.*[0-9])[- +()0-9]+$/

正则表达式演示

正则表达式解释

• (?=.*[0-9]) 积极向前看.确保至少有一位数字

• (?=.*[0-9]) postive look ahead. Ensures that there is atleast one digit

[- +()0-9]+ 匹配数字、空格、加号、连字符和括号

[- +()0-9]+ matches numbers, spaces, plus sign, hyphen and brackets

或

如果您不愿意使用前瞻.没有它们你可以写一个更长的正则表达式为

If you are reluctant in using look aheads. You could write without them a lenghier regex as

/^[- +()]*[0-9][- +()0-9]*$/

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