XSL formatNumber 模拟-优快云博客

本文链接：https://blog.youkuaiyun.com/jeseechen/article/details/759224

简单模拟了一点XSL里的formatNumber()方法

一些说明：
“,” (半角的豆号) 如果有的话，看豆号到小数点（如果有的话）前有几位，则按几位划分整数部分
“0”（数字零）如果该位上没有数字，就补0
“#”（井号）如果该位上有数字就输出数字，没有则不输出

格式化数值的函数

<script>
            function formatNumber(number,pattern)
            {
            var str			= number.toString();
            var strInt;
            var strFloat;
            var formatInt;
            var formatFloat;
            if(//./g.test(pattern))
            {
            formatInt		= pattern.split('.')[0];
            formatFloat		= pattern.split('.')[1];
            }
            else
            {
            formatInt		= pattern;
            formatFloat		= null;
            }
            if(//./g.test(str))
            {
            if(formatFloat!=null)
            {
            var tempFloat	= Math.round(parseFloat('0.'+str.split('.')[1])*Math.pow(10,formatFloat.length))/Math.pow(10,formatFloat.length);
            strInt		= (Math.floor(number)+Math.floor(tempFloat)).toString();
            strFloat	= //./g.test(tempFloat.toString())?tempFloat.toString().split('.')[1]:'0';
            }
            else
            {
            strInt		= Math.round(number).toString();
            strFloat	= '0';
            }
            }
            else
            {
            strInt		= str;
            strFloat	= '0';
            }
            if(formatInt!=null)
            {
            var outputInt	= '';
            var zero		= formatInt.match(/0*$/)[0].length;
            var comma		= null;
            if(/,/g.test(formatInt))
            {
            comma		= formatInt.match(/,[^,]*/)[0].length-1;
            }
            var newReg		= new RegExp('(//d{'+comma+'})','g');
            if(strInt.length<zero)
            {
            outputInt		= new Array(zero+1).join('0')+strInt;
            outputInt		= outputInt.substr(outputInt.length-zero,zero)
            }
            else
            {
            outputInt		= strInt;
            }
            var
            outputInt			= outputInt.substr(0,outputInt.length%comma)+outputInt.substring(outputInt.length%comma).replace(newReg,(comma!=null?',':'')+'$1')
            outputInt			= outputInt.replace(/^,/,'');
            strInt	= outputInt;
            }
            if(formatFloat!=null)
            {
            var outputFloat	= '';
            var zero		= formatFloat.match(/^0*/)[0].length;
            if(strFloat.length<zero)
            {
            outputFloat		= strFloat+new Array(zero+1).join('0');
            //outputFloat		= outputFloat.substring(0,formatFloat.length);
            var outputFloat1	= outputFloat.substring(0,zero);
            var outputFloat2	= outputFloat.substring(zero,formatFloat.length);
            outputFloat		= outputFloat1+outputFloat2.replace(/0*$/,'');
            }
            else
            {
            outputFloat		= strFloat.substring(0,formatFloat.length);
            }
            strFloat	= outputFloat;
            }
            else
            {
            if(pattern!='' || (pattern=='' && strFloat=='0'))
            {
            strFloat	= '';
            }
            }
            return strInt+(strFloat==''?'':'.'+strFloat);
            }
            alert(formatNumber(0,''));
            alert(formatNumber(12432.21,'#,###'));
            alert(formatNumber(12432.21,'#,###.000#'));
            alert(formatNumber(12432,'#,###.00'));
            alert(formatNumber(12432.419,'#,###.0#'));
            </script>

[Ctrl+A 全部选择提示：你可先修改部分代码，再按运行]