js千分位分隔，数字货币化方法学习记录

js千分位分隔，数字货币化—4种方法（含正则）

方法1-整数货币化

 	// 整数货币化 function intCurrency(num) {  var reg = new RegExp("^[\\d]+[\\d|.]+$", 'g')  if (!reg.test(num)) {   return "只能为整数或小数！";  }  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("------------整数货币化") 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-小数货币化

 	// 整数部分 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(",");  } } // 小数部分 function decimalCurrency(num) {  if (num === undefined) {   return '';  }  var len = num.length; // 小数部分长度  if (len < 3) { // 小于三位数   return num;  }  var n = len % 3;  if (n > 0) { // 位数不是3的倍数   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(',')  } }	// 货币化 function currency(num) {  var integerPart; // 整数部分  var decmialPart; // 小数部分  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("------------整数或小数货币化") 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-整数正则货币化1

 	// 直接使用正则 function currency(num) {  num = parseInt(num);  return num.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ','); } console.group("------------取整数，正则货币化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-整数正则货币化2

 	// 直接使用正则 function currency(num) {  num = parseInt(num);  return num.toString().replace(/(?=(\B)(\d{3})+$)/g, ','); } console.group("------------取整数，正则货币化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"))

　　

正则校验

// 正整数或小数 /^[0-9]+(\.[0-9]+)?$/g// 正、负整数或小数，也可不输入正负 /^(\+|-)?\d+(\.\d+)?$/g

　　

转载于：https://blog.csdn.net/Kindergarten_Sir/article/details/110382037

原文转载：http://www.shaoqun.com/a/494496.html

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js千分位分隔，数字货币化—4种方法（含正则）方法1-整数货币化 //整数货币化functionintCurrency(num){varreg=newRegExp("^[\\d]+[\\d|.]+$",'g')if(!reg.test(num)){return"只能为整数或小数！";}varnumString=parseInt(num).to
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