| | |
| | | } |
| | | |
| | | /** |
| | | * 数值转换为千分位格式 |
| | | * @param {Number|String} number - 传入的值 |
| | | * @param {String} decimalFormat - 处理小数的方式 - notRetain(不保留小数,没有小数时才生效),keepTwo(保留两位小数),keepThree(保留三位小数) |
| | | * @return {string} |
| | | */ |
| | | static thousandFormat(number, decimalFormat = 'keepTwo') { |
| | | if (!number && typeof number !== 'number' && typeof number !== 'string') { |
| | | return ''; |
| | | } |
| | | // 原始数据 |
| | | let num = number.toString(); |
| | | // 需要进千分位的数,小数点前的数才需要进行千分位计算,即整数位 |
| | | let needThousand = ''; |
| | | // 小数位 |
| | | let decimals = ''; |
| | | // 没有小数位 |
| | | if (!(num.indexOf('.') > -1)) { |
| | | needThousand = num.toString(); |
| | | if (decimalFormat === 'notRetain') { |
| | | decimals = ''; |
| | | } else if (decimalFormat === 'keepTwo') { |
| | | decimals = '00'; |
| | | } else if (decimalFormat === 'keepThree') { |
| | | decimals = '000'; |
| | | } |
| | | } |
| | | // 存在小数位时 |
| | | else if (num.indexOf('.') > -1) { |
| | | needThousand = num.split('.')[0].toString(); |
| | | if (decimalFormat === 'keepTwo') { |
| | | decimals = Number(num).toFixed(2).split('.')[1] || ''; |
| | | } else if (decimalFormat === 'keepThree') { |
| | | decimals = Number(num).toFixed(3).split('.')[1] || ''; |
| | | } |
| | | } |
| | | // 计算整数位长度 |
| | | let len = needThousand.length; |
| | | // 如果整数位小于3,直接返回 |
| | | if (len <= 3) { |
| | | return decimals ? needThousand + '.' + decimals : needThousand; |
| | | } |
| | | // 整数位大于3 |
| | | else { |
| | | // 小数位后的值 |
| | | let temp = ''; |
| | | // 对整数取余 |
| | | let remainder = len % 3; |
| | | decimals ? (temp = '.' + decimals) : temp; |
| | | if (remainder > 0) { |
| | | // 不是3的整数倍 |
| | | return ( |
| | | needThousand.slice(0, remainder) + |
| | | ',' + |
| | | needThousand.slice(remainder, len).match(/\d{3}/g)?.join(',') + |
| | | temp |
| | | ); |
| | | } else { |
| | | // 3的整数倍 |
| | | return needThousand.slice(0, len).match(/\d{3}/g)?.join(',') + temp; |
| | | } |
| | | } |
| | | } |
| | | |
| | | /** |
| | | * 加法函数,用来得到精确的加法结果 |
| | | * @param {Number|String} num1 |
| | | * @param {Number|String} num2 |