【JS】数字转大写中文

原文参考

逛到一道面试题，数字转大写中文的，搜索学习并记录于此。

//自动转换数字金额为大小写中文字符,返回大小写中文字符串，最大处理到999兆
function changeMoneyToChinese( money )
{
var cnNums = new Array("零","壹","贰","叁","肆","伍","陆","柒","捌","玖"); //汉字的数字
var cnIntRadice = new Array("","拾","佰","仟"); //基本单位
var cnIntUnits = new Array("","万","亿","兆"); //对应整数部分扩展单位
var cnDecUnits = new Array("角","分","毫","厘"); //对应小数部分单位
var cnInteger = "整"; //整数金额时后面跟的字符
var cnIntLast = "元"; //整型完以后的单位
var maxNum = 999999999999999.9999; //最大处理的数字

var IntegerNum; //金额整数部分
var DecimalNum; //金额小数部分
var ChineseStr=""; //输出的中文金额字符串
var parts; //分离金额后用的数组，预定义

if( money == "" ){
return "";
}

money = parseFloat(money);
//alert(money);
if( money >= maxNum ){
$.alert('超出最大处理数字');
return "";
}
if( money == 0 ){
ChineseStr = cnNums[0]+cnIntLast+cnInteger;
//document.getElementById("show").value=ChineseStr;
return ChineseStr;
}
money = money.toString(); //转换为字符串
if( money.indexOf(".") == -1 ){
IntegerNum = money;
DecimalNum = '';
}else{
parts = money.split(".");
IntegerNum = parts[0];
DecimalNum = parts[1].substr(0,4);
}
if( parseInt(IntegerNum,10) > 0 ){//获取整型部分转换
zeroCount = 0;
IntLen = IntegerNum.length;
for( i=0;i<IntLen;i++ ){
n = IntegerNum.substr(i,1);
p = IntLen - i - 1;
q = p / 4;
m = p % 4;
if( n == "0" ){
zeroCount++;
}else{
if( zeroCount > 0 ){
ChineseStr += cnNums[0];
}
zeroCount = 0; //归零
ChineseStr += cnNums[parseInt(n)]+cnIntRadice[m];
}
if( m==0 && zeroCount<4 ){
ChineseStr += cnIntUnits[q];
}
}
ChineseStr += cnIntLast;
//整型部分处理完毕
}
if( DecimalNum!= '' ){//小数部分
decLen = DecimalNum.length;
for( i=0; i<decLen; i++ ){
n = DecimalNum.substr(i,1);
if( n != '0' ){
ChineseStr += cnNums[Number(n)]+cnDecUnits[i];
}
}
}
if( ChineseStr == '' ){
ChineseStr += cnNums[0]+cnIntLast+cnInteger;
}
else if( DecimalNum == '' ){
ChineseStr += cnInteger;
}
return ChineseStr;

}
</script>