人民币工具类详解编程语言

RmbUtils = { 
convertCurrency: function (currencyDigits) { 
//常量 
var MAXIMUM_NUMBER = 99999999999.99; 
//预先定义输出的基数字符和货币符号: 
var CN_ZERO = "零"; 
var CN_ONE = "壹"; 
var CN_TWO = "贰"; 
var CN_THREE = "叁"; 
var CN_FOUR = "肆"; 
var CN_FIVE = "伍"; 
var CN_SIX = "陆"; 
var CN_SEVEN = "柒"; 
var CN_EIGHT = "捌"; 
var CN_NINE = "玖"; 
var CN_TEN = "拾"; 
var CN_HUNDRED = "佰"; 
var CN_THOUSAND = "仟"; 
var CN_TEN_THOUSAND = "万"; 
var CN_HUNDRED_MILLION = "亿"; 
var CN_SYMBOL = ""; 
var CN_DOLLAR = "元"; 
var CN_TEN_CENT = "角"; 
var CN_CENT = "分"; 
var CN_INTEGER = "整"; 
// 变量: 
var integral; // Represent integral part of digit number. 
var decimal; // Represent decimal part of digit number. 
var outputCharacters; // The output result. 
var parts; 
var digits, radices, bigRadices, decimals; 
var zeroCount; 
var i, p, d; 
var quotient, modulus; 
// 校验输入字符串: 
currencyDigits = currencyDigits.toString(); 
if (currencyDigits == "") { 
alert("不能为空。"); 
return false; 
} 
if (currencyDigits.match(/[^,./d]/) != null) { 
alert("请输入数字。"); 
return ''; 
} 
if ((currencyDigits).match(/^((/d{1,3}(,/d{3})*(.((/d{3},)*/d{1,3}))?)|(/d+(./d+)?))$/) == null) { 
alert("请输入正确数字。"); 
return false; 
} 
// 将输入数字的格式标准化 
currencyDigits = currencyDigits.replace(/,/g, ""); // Remove comma delimiters. 
currencyDigits = currencyDigits.replace(/^0+/, ""); // Trim zeros at the beginning. 
// 超出了最大数字转换 
if (Number(currencyDigits) > MAXIMUM_NUMBER) { 
alert("超出了最大数字转换。"); 
return false; 
} 
//处理货币数字到字符的转换 
// 将积分部分和小数部分分开 
parts = currencyDigits.split("."); 
if (parts.length > 1) { 
integral = parts[0]; 
decimal = parts[1]; 
// 小数保留2位. 
decimal = decimal.substr(0, 2); 
} else { 
integral = parts[0]; 
decimal = ""; 
} 
// 准备数字对应的字符 
digits = new Array(CN_ZERO, CN_ONE, CN_TWO, CN_THREE, CN_FOUR, CN_FIVE, CN_SIX, CN_SEVEN, CN_EIGHT, CN_NINE); 
radices = new Array("", CN_TEN, CN_HUNDRED, CN_THOUSAND); 
bigRadices = new Array("", CN_TEN_THOUSAND, CN_HUNDRED_MILLION); 
decimals = new Array(CN_TEN_CENT, CN_CENT); 
//开始处理 
outputCharacters = ""; 
// 处理整数部分 
if (Number(integral) > 0) { 
zeroCount = 0; 
for (i = 0; i < integral.length; i++) { 
p = integral.length - i - 1; 
d = integral.substr(i, 1); 
quotient = p / 4; 
modulus = p % 4; 
if (d == "0") { 
zeroCount++; 
} else { 
if (zeroCount > 0) { 
outputCharacters += digits[0]; 
} 
zeroCount = 0; 
outputCharacters += digits[Number(d)] + radices[modulus]; 
} 
if (modulus == 0 && zeroCount < 4) { 
outputCharacters += bigRadices[quotient]; 
zeroCount = 0; 
} 
} 
outputCharacters += CN_DOLLAR; 
} 
// 处理小数部分 
if (decimal != "") { 
for (i = 0; i < decimal.length; i++) { 
d = decimal.substr(i, 1); 
if (d != "0") { 
outputCharacters += digits[Number(d)] + decimals[i]; 
} 
} 
} 
// 确认并返回处理结果 
if (outputCharacters == "") { 
outputCharacters = CN_ZERO + CN_DOLLAR; 
} 
if (decimal == "") { 
outputCharacters += CN_INTEGER; 
} 
outputCharacters = CN_SYMBOL + outputCharacters; 
return outputCharacters; 
} 
}