将浮点数转换为人民币读法

public class Num2Rmb
{
private String[] hanArr = {"零","壹","贰","叁","肆","伍","陆","柒","捌","玖"};
private String[] unitArr= {"仟","佰","十","亿","仟","佰","十","万","仟","佰","十","元"};
private String[] unitArr3= {"零仟","零佰","零十","零亿","零仟","零佰","零十","零万","零仟","零佰","零十","零元"};
private String[] unitArr4= {"零","零","零","亿","零","零","零","万","零","零","零","元"};
private String[] unitArr2={"角","分","整"};

/**
* 该方法将给定的浮点数分割成整数部分和小数部分
* @param num 该参数指定需要分割的浮点数
* @return 返回字符串数组，包含整数部分和小数部分
*/
private String[] divide(double num)
{
long zheng = (long)num;
long xiao   = Math.round((num-zheng)*100);//此处需要四舍五入
return new String[]{zheng+"",xiao+""};
}

/**
* 该方法将给定的整数部分字符串转换为人民币读法字符串
* @param zheng 该参数指定需要转换的整数部分字符串
* @return 返回字符串，整数部分的人民币读法
*/
//将整数部分每四个数分为一组，每个组的读法基本相同，每个组最多4个0，按0的个数分类讨论，考虑所有情况
private String zheng2HanStr(String zheng)
{
System.out.println("整数部分："+zheng);
String result = "";
int length = zheng.length();
for(int i=0;i<length;i++)
{
int num = zheng.charAt(i)-48;//将数字字符换成对应数字
result += hanArr[num]+unitArr[12-length+i];//将数字换成汉字并加上数位
}//end for
System.out.println(result);//"叁佰零十贰亿玖仟零佰零十零万零仟零佰零十零元"
length = result.length();
for(int i=0;i<12;i++)
{
result = result.replaceAll(unitArr3[i],unitArr4[i]);
}//end for
System.out.println(result);//"叁佰零贰亿玖仟零零万零零零元"
while(result.indexOf("零零")>=0)//去掉所有"零零"
{
result = result.replaceAll("零零","零");
}//end while
System.out.println(result);//"叁佰零贰亿玖仟零万零元"
result = result.replaceAll("零万","");
System.out.println(result);//"叁佰零贰亿玖仟零元"
result = result.replaceAll("零元","元");
System.out.println(result);//"叁佰零贰亿玖仟元"
return result;
}

/**
* 该方法将给定的小数部分字符串转换为人民币读法字符串
* @param xiao 该参数指定需要转换的小数部分字符串
* @return 返回字符串，小数部分的人民币读法
*/
private String xiao2HanStr(String xiao)
{
System.out.println("小数部分："+xiao);
String result = "";
int length = xiao.length();
if(length == 2){
int num1 = xiao.charAt(0)-48;
int num2 = xiao.charAt(1)-48;
if(num1 != 0 && num2 ==0) {result += hanArr[num1]+unitArr2[0];}//针对小数部分是".90"这种情况
else  {result += hanArr[num1]+unitArr2[0]+hanArr[num2]+unitArr2[1];}//针对小数部分是".89"这种情况
}
else if(length == 1){
int num1 = xiao.charAt(0)-48;
if(num1 != 0) {result += hanArr[0]+hanArr[num1]+unitArr2[1];}//针对小数部分是".09"这种情况
else {result += unitArr2[2];}//针对小数部分是".00"这种情况
System.out.println("有一位！");
}
else{//针对可能出现的意外情况
result += unitArr2[2];
System.out.println("没有位！");
}//end if
return result;
}

/**
* 该方法将给定的浮点数转换为人民币读法字符串
* @param num 该参数指定需要转换的浮点数
* @return 返回字符串，浮点数的人民币读法
*/
private String toHanStr(double num)
{
String result = "";
Num2Rmb nr2 = new Num2Rmb();
String[] diviStr2 = nr2.divide(num);
result += nr2.zheng2HanStr(diviStr2[0]);
result += nr2.xiao2HanStr(diviStr2[1]);
return result;
}

public static void main(String[] args)
{
Num2Rmb nr = new Num2Rmb();
/*
System.out.println(nr.toHanStr(2036711123.10));
System.out.println(nr.toHanStr(236711123.05));
System.out.println(nr.toHanStr(236711123.00));
System.out.println(nr.toHanStr(236711123.89));
System.out.println(nr.toHanStr(230000023L));
System.out.println(nr.toHanStr(30230000000L));//30230000000默认是int类型，超过表数范围
System.out.println(nr.toHanStr(30230000000.0));
*/
System.out.println(nr.toHanStr(30290000000.09));
}
}