jquery formatCurrency货币格式化处理

//  This file is part of the jQuery formatCurrency Plugin.

//

//    The jQuery formatCurrency Plugin is free software: you can redistribute it

//    and/or modify it under the terms of the GNU General Public License as published 

//    by the Free Software Foundation, either version 3 of the License, or

//    (at your option) any later version.



//    The jQuery formatCurrency Plugin is distributed in the hope that it will

//    be useful, but WITHOUT ANY WARRANTY; without even the implied warranty 

//    of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

//    GNU General Public License for more details.

//

//    You should have received a copy of the GNU General Public License along with 

//    the jQuery formatCurrency Plugin.  If not, see <http://www.gnu.org/licenses/>.

//    wiki http://code.google.com/p/jquery-formatcurrency/wiki/Usage



(function($) {



    $.formatCurrency = {};



    $.formatCurrency.regions = [];



    // default Region is en

    $.formatCurrency.regions[''] = {

        symbol: '',

        positiveFormat: '%s%n',

        negativeFormat: '(%s%n)',

        decimalSymbol: '.',

        digitGroupSymbol: ',',

        groupDigits: true

    };



    $.fn.formatCurrency = function(destination, settings) {



        if (arguments.length == 1 && typeof destination !== "string") {

            settings = destination;

            destination = false;

        }



        // initialize defaults

        var defaults = {

            name: "formatCurrency",

            colorize: false,

            region: '',

            global: true,

            roundToDecimalPlace: 2, // roundToDecimalPlace: -1; for no rounding; 0 to round to the dollar; 1 for one digit cents; 2 for two digit cents; 3 for three digit cents; ...

            eventOnDecimalsEntered: false

        };

        // initialize default region

        defaults = $.extend(defaults, $.formatCurrency.regions['']);

        // override defaults with settings passed in

        settings = $.extend(defaults, settings);



        // check for region setting

        if (settings.region.length > 0) {

            settings = $.extend(settings, getRegionOrCulture(settings.region));

        }

        settings.regex = generateRegex(settings);



        return this.each(function() {

            $this = $(this);



            // get number

            var num = '0';

            num = $this[$this.is('input, select, textarea') ? 'val' : 'html']();



            //identify '(123)' as a negative number

            if (num.search('\\(') >= 0) {

                num = '-' + num;

            }



            if (num === '' || (num === '-' && settings.roundToDecimalPlace === -1)) {

                return;

            }



            // if the number is valid use it, otherwise clean it

            if (isNaN(num)) {

                // clean number

                num = num.replace(settings.regex, '');

                

                if (num === '' || (num === '-' && settings.roundToDecimalPlace === -1)) {

                    return;

                }

                

                if (settings.decimalSymbol != '.') {

                    num = num.replace(settings.decimalSymbol, '.');  // reset to US decimal for arithmetic

                }

                if (isNaN(num)) {

                    num = '0';

                }

            }

            

            // evalutate number input

            var numParts = String(num).split('.');

            var isPositive = (num == Math.abs(num));

            var hasDecimals = (numParts.length > 1);

            var decimals = (hasDecimals ? numParts[1].toString() : '0');

            var originalDecimals = decimals;

            

            // format number

            num = Math.abs(numParts[0]);

            num = isNaN(num) ? 0 : num;

            if (settings.roundToDecimalPlace >= 0) {

                decimals = parseFloat('1.' + decimals); // prepend "0."; (IE does NOT round 0.50.toFixed(0) up, but (1+0.50).toFixed(0)-1

                decimals = decimals.toFixed(settings.roundToDecimalPlace); // round

                if (decimals.substring(0, 1) == '2') {

                    num = Number(num) + 1;

                }

                decimals = decimals.substring(2); // remove "0."

            }

            num = String(num);



            if (settings.groupDigits) {

                for (var i = 0; i < Math.floor((num.length - (1 + i)) / 3); i++) {

                    num = num.substring(0, num.length - (4 * i + 3)) + settings.digitGroupSymbol + num.substring(num.length - (4 * i + 3));

                }

            }



            if ((hasDecimals && settings.roundToDecimalPlace == -1) || settings.roundToDecimalPlace > 0) {

                num += settings.decimalSymbol + decimals;

            }



            // format symbol/negative

            var format = isPositive ? settings.positiveFormat : settings.negativeFormat;

            var money = format.replace(/%s/g, settings.symbol);

            money = money.replace(/%n/g, num);



            // setup destination

            var $destination = $([]);

            if (!destination) {

                $destination = $this;

            } else {

                $destination = $(destination);

            }

            // set destination

            $destination[$destination.is('input, select, textarea') ? 'val' : 'html'](money);



            if (

                hasDecimals && 

                settings.eventOnDecimalsEntered && 

                originalDecimals.length > settings.roundToDecimalPlace

            ) {

                $destination.trigger('decimalsEntered', originalDecimals);

            }



            // colorize

            if (settings.colorize) {

                $destination.css('color', isPositive ? 'black' : 'red');

            }

        });

    };



    // Remove all non numbers from text

    $.fn.toNumber = function(settings) {

        var defaults = $.extend({

            name: "toNumber",

            region: '',

            global: true

        }, $.formatCurrency.regions['']);



        settings = jQuery.extend(defaults, settings);

        if (settings.region.length > 0) {

            settings = $.extend(settings, getRegionOrCulture(settings.region));

        }

        settings.regex = generateRegex(settings);



        return this.each(function() {

            var method = $(this).is('input, select, textarea') ? 'val' : 'html';

            $(this)[method]($(this)[method]().replace('(', '(-').replace(settings.regex, ''));

        });

    };



    // returns the value from the first element as a number

    $.fn.asNumber = function(settings) {

        var defaults = $.extend({

            name: "asNumber",

            region: '',

            parse: true,

            parseType: 'Float',

            global: true

        }, $.formatCurrency.regions['']);

        settings = jQuery.extend(defaults, settings);

        if (settings.region.length > 0) {

            settings = $.extend(settings, getRegionOrCulture(settings.region));

        }

        settings.regex = generateRegex(settings);

        settings.parseType = validateParseType(settings.parseType);



        var method = $(this).is('input, select, textarea') ? 'val' : 'html';

        var num = $(this)[method]();

        num = num ? num : "";

        num = num.replace('(', '(-');

        num = num.replace(settings.regex, '');

        if (!settings.parse) {

            return num;

        }



        if (num.length == 0) {

            num = '0';

        }



        if (settings.decimalSymbol != '.') {

            num = num.replace(settings.decimalSymbol, '.');  // reset to US decimal for arthmetic

        }



        return window['parse' + settings.parseType](num);

    };



    function getRegionOrCulture(region) {

        var regionInfo = $.formatCurrency.regions[region];

        if (regionInfo) {

            return regionInfo;

        }

        else {

            if (/(\w+)-(\w+)/g.test(region)) {

                var culture = region.replace(/(\w+)-(\w+)/g, "$1");

                return $.formatCurrency.regions[culture];

            }

        }

        // fallback to extend(null) (i.e. nothing)

        return null;

    }



    function validateParseType(parseType) {

        switch (parseType.toLowerCase()) {

            case 'int':

                return 'Int';

            case 'float':

                return 'Float';

            default:

                throw 'invalid parseType';

        }

    }

    

    function generateRegex(settings) {

        if (settings.symbol === '') {

            return new RegExp("[^\\d" + settings.decimalSymbol + "-]", "g");

        }

        else {

            var symbol = settings.symbol.replace('$', '\\$').replace('.', '\\.');        

            return new RegExp(symbol + "|[^\\d" + settings.decimalSymbol + "-]", "g");

        }    

    }



})(jQuery);

1.引入jquery和插件(jquery省略)

<script src="jquery.formatCurrency-1.4.0.js" type="text/javascript" ></script>

2.使用插件API方法

// 如将页面所有表格的金额单元格格式化显示

$('.label').formatCurrency();



// 

$('.ageInput').toNumber();