JavaScript格式化数目字

JavaScript格式化数字

使用JavaScript格式化数字的字符串

?

例如：1234567??? -- >?? 1,234,567?????????? #,#00

??????????? 1234567??? -- >??? 1,234,567.00???? #,#00.00

?

JavaScript函数

function formatNumber(number,pattern){    var str = number.toString();    var negative = false;    if(str.startWith("-")){    str = str.substring(1);    number = - number;    negative = true;    }    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 (negative?"-":"")+strInt+(strFloat==''?'':'.'+strFloat);    // return strInt+(strFloat==''?'':'.'+strFloat);}

?