正则表达式，允许数字，空格，加号，连字符和括号 [英] Regular expression which allows numbers, spaces, plus sign, hyphen and brackets
问题描述
我正在使用jquery验证器，我在其中添加了一个方法来验证字符串，该字符串只允许数字，空格，加号，连字符和括号。数字在字符串中是必填项，但其他租船人是可选的。
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 validor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."
);
以下规则代码：
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
您可以将所需字符添加到字符类中
You can add the required characters into character class as
/^(?=.*[0-9])[- +()0-9]+$/
正则表达式解释
-
（？=。* [0-9]）积极向前看。确保至少有一位数
(?=.*[0-9])postive look ahead. Ensures that there is atleast one digit
[ - +（）0-9] + 匹配数字，空格，加号，连字符和括号
[- +()0-9]+ matches numbers, spaces, plus sign, hyphen and brackets
OR
如果您不愿意使用预测。你可以在没有它们的情况下写一个lenghier正则表达式
If you are reluctant in using look aheads. You could write without them a lenghier regex as
/^[- +()]*[0-9][- +()0-9]*$/
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