Currency / Percent Regular Expression

问题

I have to match values like

€ 6.483,00

OR values like

18,50%  

OR, again,

+65,86 %

in a Javascript function, which I drafted as:

function(s) {
  return /^[0-9]?[0-9,\.]*$/.test(s);
}

but, obviously, it's not working... how should it be changed?

回答1:

var sample = [
    "€ 6.483,00",
    "18,50%",
    "+65,86 %"
]
for(var i = 0; i < sample.length; i++) {
    var input = sample[i];
    var regex = /^(\u20ac ?)?\+?\d+(\.\d+)?(\,\d+)?( ?%)?$/
    console.log(input + "\t" + regex.test(input));
}

If there are cases that do not/should not match then let me know.

回答2:

^(?:€|\+)?\s*\d+(?:\.?\d{3})*(?:,\d+)?\s*%?\s*$

See it here on Regexr

Start of the string, an optional € or +, then optional whitespace, Then there should be at list one digit, followed by an optional dot and three digits, then an optional fraction, optional whitespace, optional % more optional whitespace and then the end of the string,

来源：https://stackoverflow.com/questions/7385145/currency-percent-regular-expression