金额转大写

import java.text.DecimalFormat;
import java.util.*;
//@北冥道人骑鲲打代码
public class f2 {
    private static String[] numBig = { "零", "壹", "贰", "叁", "肆",  "伍", "陆", "柒", "捌", "玖" };
    private static String[] numInt = { "", "拾", "佰", "仟", "万", "拾", "佰", "仟", "亿", "拾", "佰", "仟" };// 整数单位
    private static String[] numFloat = { "厘", "分", "角" };// 小数单位
    
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        System.out.println("请输入金额");
        double money = input.nextDouble();

        //格式化double数字
        DecimalFormat df = new DecimalFormat("#0.###");//此时strNum小数位最多3位 
        String strNum = df.format(money);
        if (strNum.indexOf(".") > 0 ) {//判断是否有小数
            String strMoneyInt = strNum.substring(0, strNum.indexOf("."));
            if(strMoneyInt.length() > 12){
                System.out.println("数字太大了，转换不了");
            }else{
                System.out.println(getInt(strNum) + "元" + getDouble(strNum));
            }
        }
        else{
            if(strNum.length() > 12){
                System.out.println("数字太大了，转换不了");
            }else{
                System.out.println(getInt(strNum) + "元整");
            }
        }
    }
    
    //整数部分
    public static String getInt(String str) {
        if(str.indexOf(".") != -1){
            str = str.substring(0,str.indexOf("."));//截取小数点前面的数字
        }
        str = new StringBuffer(str).reverse().toString();//反转字符串
        StringBuffer strB = new StringBuffer(); //创建一个空的StringBuffer对象
        for (int i = 0; i < str.length(); i++){ //把单位添加进去
            strB.append(numInt[i]);
            strB.append(numBig[(str.charAt(i)-48)]);
            //str.charAt(i)-48，这里-48是因为str.charAt(i)-48为ASCII码
            //而参照ASCII码：
            //ASCII码为 48 ==》0
            //ASCII码为 49 ==》1 ...
        }
        str = strB.reverse().toString();//把反转过的字符串还原

        //替换字符串多于的字符
        if (str.indexOf("零拾") != -1){str = str.replace( "零拾", "零");}
        if (str.indexOf("零佰") != -1){str = str.replace( "零拾", "零");}
        if (str.indexOf("零仟") != -1){str = str.replace( "零拾", "零");}
        if (str.indexOf("零万") != -1){str = str.replace( "零拾", "万");}
        if (str.indexOf("零亿") != -1){str = str.replace( "零拾", "亿");}
        if (str.indexOf("零零") != -1){str = str.replace( "零拾", "零");}
        if (str.indexOf("亿万") != -1){str = str.replace( "零拾", "亿");}

        //除去零的结尾
        if (str.lastIndexOf("零") == str.length() - 1) {
            str = str.substring(0, str.length() - 1);
        }
        return str;
    }
    
    //小数部分
    public static String getDouble(String str) {
        str = str.substring(str.indexOf(".") + 1);//截取小数点后的数字

        //解决单位错位
        if(str.length() == 1){str = str +"00";}
        else if(str.length() == 2){str = str +"0";}

        str = new StringBuffer(str).reverse().toString();//反转字符串
        StringBuffer strB = new StringBuffer();//创建一个空的StringBuffer对象
        for (int i = 0; i < str.length(); i++) {//把单位添加进去
            strB.append(numFloat[i]);
            strB.append(numBig[str.charAt(i) - 48]);
        }
        str = strB.reverse().toString();//把反转过的字符串还原

        //替换字符串多于的字符
        if (str.indexOf("零角") != -1){str = str.replace( "零角", "零");}
        if (str.indexOf("零分") != -1){str = str.replace( "零分", "零");}
        if (str.indexOf("零厘") != -1){str = str.replace( "零厘", "零");}
        if (str.indexOf("零零") != -1){str = str.replace( "零零", "零");}

        //除去零的结尾
        if (str.lastIndexOf("零") == str.length() - 1) {
            str = str.substring(0, str.length() - 1);
        }
        return str;
    }
}