JavaScript 中货币值的正则表达式
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/11799539/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
regex for money values in JavaScript
提问by cakeforcerberus
Been out of the regexgame for a while. Trying to come up with something that will allow the user to enter a money value either with/without dollar sign or with/without commas. For example, all the of the following values should be valid:
离开regex游戏有一段时间了。试图想出一些东西，允许用户输入带/不带美元符号或带/不带逗号的货币值。例如，以下所有值都应有效：
5
5.1
5.10
500,000
500,000.1
500,000.10
0,000,000.50
etc....
Could someone please help me out?
有人可以帮我吗？
回答by Kip
This should work:
这应该有效：
isValid = str.search(/^$?[\d,]+(\.\d*)?$/) >= 0;
A little more strict with comma placement (would reject 3,2.10, for example):
对逗号放置更严格（例如拒绝 3,2.10）：
isValid = str.search(/^$?\d+(,\d{3})*(\.\d*)?$/) >= 0;
To get a number out of it:
要从中获取一个数字：
if(isValid) {
var num = Number(str.replace(/[$,]/g, ''));
...
}
回答by Larry Battle
I didn't Test Driven Developement, TDD, for this one using the Qunit framework.
我没有为此使用 Qunit 框架进行测试驱动开发，TDD。
TDD overview http://net.tutsplus.com/tutorials/javascript-ajax/test-driven-javascript-development-in-practice/
TDD 概述http://net.tutsplus.com/tutorials/javascript-ajax/test-driven-javascript-development-in-practice/
1st: Write tests.
第一：编写测试。
2nd: Watch tests fail.
第二：观察测试失败。
3rd: Make test pass.
第三：让测试通过。
4th: Refactor.
第四：重构。
var moneyTest_RE = /^$?\d+((,\d{3})+)?(\.\d+)?$/;
test("test money format for valid values", function () {
var moneyArr = ["5","5.1","5.10","","500,000","500,000.1","500,000.10","0,000,000.50", "500,000,100" ];
var i = moneyArr.length;
while( i-- ){
equal( moneyTest_RE.test( moneyArr[ i ] ), true, moneyArr[ i ] + " didn't match completely." );
}
});
test("test money format for invalid values", function () {
var moneyArr = ["5..","$.1",".5.10",".2.","50,0,000",",500,000.1","500,000,10,",",00,000,000.50", "500,000,10"];
var i = moneyArr.length;
while( i-- ){
equal( moneyTest_RE.test( moneyArr[ i ] ), false, moneyArr[ i ] + " didn't match completely." );
}
});
Here's one possible solution to your problem.
这是您问题的一种可能解决方案。
var moneyTest_RE = /^$?\d+((,\d{3})+)?(\.\d+)?$/;
Demo here: http://jsfiddle.net/vpyV6/
演示在这里：http: //jsfiddle.net/vpyV6/
I forgot to refactor though.
不过我忘了重构。
回答by Riot Goes Woof
^(\$?\d{1,3}(?:,?\d{3})*(?:\.\d{2})?|\.\d{2})?$
^(\$?\d{1,3}(?:,?\d{3})*(?:\.\d{2})?|\.\d{2})?$
This one took a while, but I finally got something fully functional. It allows for cases such as 100.00, .35, $1.35, etc. While excluding entries with misplaced commas, too many numbers in between or before commas, or too many numbers after the decimal point.
这个花了一段时间，但我终于得到了一些功能齐全的东西。它允许诸如 100.00、.35、$1.35 等情况。同时排除带有错位逗号、逗号之间或之前的数字过多或小数点后的数字过多的条目。
You can play around with it here
你可以在这里玩它
回答by Himanshu Teotia
var currencyRegex = /^[$￡]\d+(?:\.\d\d)*$/g;
Example: $10 or ￡10 0r 10but if you use simple 10this will be wrong
示例：$10 or ￡10 0r 10但是如果您使用 simple10这将是错误的
回答by user1034533
Perhaps this? http://refiddle.com/2tg
也许这个？ http://refiddle.com/2tg
($?(:?\d+,?.?)+)
Also, http://refiddle.com/2ti; a longer version that doesn't match numbers like 123,45.4.3
另外，http://refiddle.com/2ti；与 123,45.4.3 等数字不匹配的较长版本
^($?(:?\d+,?)+(?:.?\d+)?)$
