js千分位分隔，數字貨幣化—4種方法（含正則）
方法1-整數貨幣化
// 整數貨幣化
function intCurrency(num) {
var reg = new RegExp("^[\\d]+[\\d|.]+$", 'g')
if (!reg.test(num)) {
return "只能為整數或小數！";
}
var numString = parseInt(num).toString();
var len = numString.length;
if (len < 3) {
return num;
}
var n = len % 3;
if (n > 0) {
return numString.slice(0, n) + "," + numString.slice(n, len).match(/\d{3}/g).join(",");
} else {
return numString.slice(n, len).match(/\d{3}/g).join(",");
}
}
console.group("------------整數貨幣化")
console.log(intCurrency("abs"))
console.log(intCurrency("0"))
console.log(intCurrency("10"))
console.log(intCurrency("100"))
console.log(intCurrency("1000"))
console.log(intCurrency("10000"))
console.log(intCurrency("100000"))
console.log(intCurrency("1000000"))
console.log(intCurrency("10000000"))
console.log(intCurrency("100000000"))
console.log(intCurrency("1000000000"))
console.log(intCurrency("1000000000.0"))
console.log(intCurrency("1000000000.00"))
console.log(intCurrency("1000000000.000"))
方法2-小數貨幣化
// 整數部分
function intCurrency(num) {
if (num === undefined) {
return '';
}
var len = num.length;
if (len < 3) {
return num;
}
var n = len % 3;
if (n > 0) {
return num.slice(0, n) + "," + num.slice(n, len).match(/\d{3}/g).join(",");
} else {
return num.slice(n, len).match(/\d{3}/g).join(",");
}
}
// 小數部分
function decimalCurrency(num) {
if (num === undefined) {
return '';
}
var len = num.length; // 小數部分長度
if (len < 3) { // 小于三位數
return num;
}
var n = len % 3;
if (n > 0) { // 位數不是3的倍數
return num.slice(0, len - n).match(/\d{3}/g).join(',') + ',' + num.slice(len - n);
} else {
return num.slice(0, len - n).match(/\d{3}/g).join(',')
}
}
// 貨幣化
function currency(num) {
var integerPart; // 整數部分
var decmialPart; // 小數部分
num = num.toString();
if (num.includes(".")) {
integerPart = num.split('.')[0];
decmialPart = num.split('.')[1];
} else {
integerPart = num;
}
return intCurrency(integerPart) + (decmialPart !== undefined ? ('.' + decimalCurrency(decmialPart)) : '');
}
console.group("------------整數或小數貨幣化")
console.log(currency("0"))
console.log(currency("10"))
console.log(currency("100"))
console.log(currency("1000"))
console.log(currency("10000"))
console.log(currency("100000"))
console.log(currency("1000000"))
console.log(currency("10000000"))
console.log(currency("100000000"))
console.log(currency("1000000000"))
console.log(currency("1000000000.0"))
console.log(currency("1000000000.00"))
console.log(currency("1000000000.000"))
console.log(currency("1000000000.0000"))
console.log(currency("1000000000.00000"))
方法3-整數正則貨幣化1
// 直接使用正則
function currency(num) {
num = parseInt(num);
return num.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ',');
}
console.group("------------取整數，正則貨幣化1")
console.log(currency("0"))
console.log(currency("10"))
console.log(currency("100"))
console.log(currency("1000"))
console.log(currency("10000"))
console.log(currency("100000"))
console.log(currency("1000000"))
console.log(currency("10000000"))
console.log(currency("100000000"))
console.log(currency("1000000000"))
console.log(currency("1000000000.0"))
console.log(currency("1000000000.00"))
console.log(currency("1000000000.000"))
console.log(currency("1000000000.0000"))
console.log(currency("1000000000.00000"))
方法4-整數正則貨幣化2
// 直接使用正則
function currency(num) {
num = parseInt(num);
return num.toString().replace(/(?=(\B)(\d{3})+$)/g, ',');
}
console.group("------------取整數，正則貨幣化2")
console.log(currency("0"))
console.log(currency("10"))
console.log(currency("100"))
console.log(currency("1000"))
console.log(currency("10000"))
console.log(currency("100000"))
console.log(currency("1000000"))
console.log(currency("10000000"))
console.log(currency("100000000"))
console.log(currency("1000000000"))
console.log(currency("1000000000.0"))
console.log(currency("1000000000.00"))
console.log(currency("1000000000.000"))
console.log(currency("1000000000.0000"))
console.log(currency("1000000000.00000"))
正則校驗
// 正整數或小數 /^[0-9]+(\.[0-9]+)?$/g // 正、負整數或小數，也可不輸入正負 /^(\+|-)?\d+(\.\d+)?$/g
轉載于：https://blog.csdn.net/Kindergarten_Sir/article/details/110382037
轉載請註明出處，本文鏈接：https://www.uj5u.com/qiye/228866.html
標籤：JavaScript