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/**
* @Description: 千分位转换
* @author cr
* @param {Number} value 金额
* @param {Number} decimal 要保留的小数位，默认两位
* @date 2020/4/18
* @time 12:05
*/
export function formatMoney(value: any, decimal: any) {
const _decimal = decimal || 2;
let number = toDecimal(value, _decimal);
number = executeLcommafy(number);
if (value === '' || (value == null && value !== 0)) {
return '';
}
return number;
}
/**
* 将金额转为万元(一万)(小数)
* @param amount String 金额
*/
export function toMillion(amount: any) {
amount = amount || 0;
amount = (parseFloat(amount) / 10000).toFixed(2);
var chararr = []; //用来存储金额字符串中的每一个字符
var rlength = amount.indexOf(".") > 0 ? amount.indexOf(".") : amount.length; //如果有小数点，则只考虑小数点之前的数字进行处理
for (let i = 0; i < amount.length; i++) {
if ((rlength - i > 0) && ((rlength - i) % 3 == 0) && (i != 0)) {
//长度减索引表示实际要处理字符串倒序的序号，如果能整除3则在前加逗号
chararr.push(',');
}
chararr.push(amount.charAt(i));
}
return chararr.join(''); //join方法重新将字符串数组拼接成字符串
}
/**
* @Description: 加千分位
* @author cr
* @date 2020/4/18
* @time 12:12
*/
function executeLcommafy(val: any) {
if (!val || !isNumber(val)) {
return '';
}
if (isNumber(val)) {
val = val.toString();
}
if (/^.*\..*$/.test(val)) {
const pointIndex = val.lastIndexOf('.');
let intPart = val.substring(0, pointIndex);
const pointPart = val.substring(pointIndex + 1, val.length);
intPart = intPart + '';
let re = /(-?\d+)(\d{3})/;
while (re.test(intPart)) {
intPart = intPart.replace(re, '$1,$2');
}
val = intPart + '.' + pointPart;
} else {
var re = /(-?\d+)(\d{3})/;
while (re.test(val)) {
val = val.replace(re, '$1,$2');
}
}
return val;
}
/**
* @Description: 保留小数位数
* @author cr
* @date 2020/4/18
* @time 12:01
*/
function toDecimal(value: any, decimal: any) {
if (isNumber(value)) {
if (isNumber(decimal)) {
return roundFixed(value, decimal);
} else {
return value;
}
} else {
return null;
}
}
/**
* @Description: 检测是否为数字
* @author cr
* @date 2020/4/18
* @time 12:01
*/
function isNumber(val: any) {
let regPos = /^\d+(\.\d+)?$/; //非负浮点数
let regNeg = /^(-(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*)))$/; //负浮点数
return regPos.test(val) || regNeg.test(val);
}
/**
* @Description: 四舍五入
* @author cr
* @date 2020/4/18
* @time 12:02
*/
function roundFixed(num: any, fixed: any) {
let pos = num.toString().indexOf('.');
let decimal_places = num.toString().length - pos - 1;
let _int = num * Math.pow(10, decimal_places);
let divisor_1 = Math.pow(10, decimal_places - fixed);
let divisor_2 = Math.pow(10, fixed);
const value = Math.round(_int / divisor_1) / divisor_2;
return prefixZero(value, fixed);
}
/**
* @Description: 精度
* @author cr
* @date 2020/4/18
* @time 12:03
*/
function prefixZero(value: any, num: any) {
let a, b, c, i;
a = value.toString();
b = a.indexOf('.');
c = a.length;
if (num === 0) {
if (b !== -1) {
a = a.substring(0, b);
}
} else {
/*如果没有小数点*/
if (b === -1) {
a = a + '.';
for (i = 1; i <= num; i++) {
a = a + '0';
}
} else {
/*有小数点，超出位数自动截取，否则补0*/
a = a.substring(0, b + num + 1);
for (i = c; i <= b + num; i++) {
a = a + '0';
}
}
}
return a;
}