JS 常见的数据操作方法

//四舍五入
function round2(number, fractionDigits) {
    with (Math) {
        return round(number * pow(10, fractionDigits)) / pow(10, fractionDigits);
    }
}

// 空替换0
function fun_FillStr(Str) {
    Str = Str.replace(/(^\s*)|(\s*$)/g, "") == "" ? "0" : Str;
    Str = Str.replace(/(^\s*)|(\s*$)/g, "") == "-" ? "0" : Str;
    return Str;
}

//乘除法
function Fun_Interceptiont(arg1, arg2, type) {
    var m = 0;
    var s1 = "";
    var s2 = "";
    var s3 = "";
    try {
        s1 = arg1.toString();
    } catch (e) {

    }
    try {
        s2 = arg2.toString();
    } catch (e) {

    }
    try {
        s3 = arg3.toString();
    } catch (e) {

    }
    try {
        m += s1.split(".")[1].length;
    }
    catch (e) {
    }
    try {
        m += s2.split(".")[1].length;
    }
    catch (e) {
    }
    if (type == 1) //除法
    {
        JSHJ = Number(s1.replace(".", "")) / Number(s2.replace(".", "")) / Math.pow(10, m);
    }
    else {
        JSHJ = Number(s1.replace(".", "")) * Number(s2.replace(".", "")) / Math.pow(10, m);
    }
}
//乘除法
function Fun_Interceptiont_GZ(arg1, arg2, arg3, type) {
    var m = 0;
    var s1 = "";
    var s2 = "";
    var s3 = "";
    try {
        s1 = arg1.toString();
    } catch (e) {

    }
    try {
        s2 = arg2.toString();
    } catch (e) {

    }
    try {
        s3 = arg3.toString();
    } catch (e) {

    }

    try {
        m += s1.split(".")[1].length;
    }
    catch (e) {
    }
    try {
        m += s2.split(".")[1].length;
    }
    catch (e) {
    }
    if (type == 1) //除法
    {
        JSHJ = Number(s1.replace(".", "")) / Number(s2.replace(".", "")) / Math.pow(10, m);
    }
    else {
        JSHJ = Number(s1.replace(".", "")) * Number(s2.replace(".", "")) * Number(s3) / Math.pow(10, m);
    }
}
//加减法
function Fun_InterceptiontTotal(arg1, arg2, type) {
    var r1, r2, m, n;
    try {
        r1 = arg1.toString().split('.')[1].length;
    }
    catch (e) {
        r1 = 0;
    }
    try {
        r2 = arg2.toString().split('.')[1].length;
    }
    catch (e) {
        r2 = 0;
    }
    if (type == 1) //减法
    {
        m = Math.pow(10, Math.max(r1, r2));
        n = (r1 >= r2) ? r1 : r2;
        JSHJ = ((arg1 * m - arg2 * m) / m).toFixed(n);
    }
    else {
        m = Math.pow(10, Math.max(r1, r2));
        JSHJ = (arg1 * m + arg2 * m) / m;
    }
}

//判断字符是否为空的方法
function isEmpty(obj) {
    if (typeof obj == "undefined" || obj == null || obj == "" || obj == "NaN" || isNaN(obj)) {
        return true;
    } else {
        return false;
    }
}
//计算百分比
function GetPercent(num, total) {
    num = parseFloat(num);
    total = parseFloat(total);
    if (isNaN(num) || isNaN(total)) {
        return "-";
    }
    return total <= 0 ? "0%" : (Math.round(num / total * 10000) / 100.00 + "%");
}

//将小写转化成大写
function atoc(numberValue) {
    var numberValue = new String(Math.round(numberValue * 100)); // 数字金额
    var chineseValue = ""; // 转换后的汉字金额
    var String1 = "零壹贰叁肆伍陆柒捌玖"; // 汉字数字
    var String2 = "万仟佰拾亿仟佰拾万仟佰拾元角分"; // 对应单位
    var len = numberValue.length; // numberValue 的字符串长度
    var Ch1; // 数字的汉语读法
    var Ch2; // 数字位的汉字读法
    var nZero = 0; // 用来计算连续的零值的个数
    var String3; // 指定位置的数值
    if (len > 15) {
        alert("超出计算范围");
        return "";
    }
    if (numberValue == 0) {
        chineseValue = "零元整";
        return chineseValue;
    }
    String2 = String2.substr(String2.length - len, len); // 取出对应位数的STRING2的值
    for (var i = 0; i < len; i++) {
        String3 = parseInt(numberValue.substr(i, 1), 10); // 取出需转换的某一位的值
        if (i != (len - 3) && i != (len - 7) && i != (len - 11) && i != (len - 15)) {
            if (String3 == 0) {
                Ch1 = "";
                Ch2 = "";
                nZero = nZero + 1;
            }
            else if (String3 != 0 && nZero != 0) {
                Ch1 = "零" + String1.substr(String3, 1);
                Ch2 = String2.substr(i, 1);
                nZero = 0;
            }
            else {
                Ch1 = String1.substr(String3, 1);
                Ch2 = String2.substr(i, 1);
                nZero = 0;
            }
        }
        else { // 该位是万亿，亿，万，元位等关键位
            if (String3 != 0 && nZero != 0) {
                Ch1 = "零" + String1.substr(String3, 1);
                Ch2 = String2.substr(i, 1);
                nZero = 0;
            }
            else if (String3 != 0 && nZero == 0) {
                Ch1 = String1.substr(String3, 1);
                Ch2 = String2.substr(i, 1);
                nZero = 0;
            }
            else if (String3 == 0 && nZero >= 3) {
                Ch1 = "";
                Ch2 = "";
                nZero = nZero + 1;
            }
            else {
                Ch1 = "";
                Ch2 = String2.substr(i, 1);
                nZero = nZero + 1;
            }
            if (i == (len - 11) || i == (len - 3)) { // 如果该位是亿位或元位，则必须写上
                Ch2 = String2.substr(i, 1);
            }
        }
        chineseValue = chineseValue + Ch1 + Ch2;
    }
    if (String3 == 0) { // 最后一位（分）为0时，加上“整”
        chineseValue = chineseValue + "整";
    }
    return chineseValue;
}