用java3.编写一段程序，实现从控制台中读取一个数字，然后打印出这个数字四舍五入后对应的人民币大写汉字字符。例如： 输入：3000 输出：叁仟 输入：300.569 输出：三佰元五角七分

import java.math.BigDecimal;
import java.math.RoundingMode;
import java.util.Scanner;

public class Main {
    private static final String[] CN_NUMBERS = {"零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖"};
    private static final String[] CN_UNITS = {"元", "拾", "佰", "仟", "万", "拾万", "佰万", "仟万", "亿", "拾亿", "佰亿", "仟亿"};
    private static final String CN_DOLLAR = "元";
    private static final String CN_NEGATIVE = "负";
    private static final String CN_INTEGER = "整";
    private static final String CN_ZERO = "零";
    private static final String CN_TEN_CENTS = "角";
    private static final String CN_CENTS = "分";

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("请输入一个数字：");
        BigDecimal number = scanner.nextBigDecimal();
        String result = convertNumberToCN(number);
        System.out.println("对应的人民币大写汉字字符为：" + result);
    }

    private static String convertNumberToCN(BigDecimal number) {
        StringBuilder sb = new StringBuilder();
        if (number.compareTo(BigDecimal.ZERO) < 0) {
            sb.append(CN_NEGATIVE);
            number = number.abs();
        }
        number = number.setScale(2, RoundingMode.HALF_UP);
        String[] parts = number.toString().split("\\.");
        String integerPart = parts[0];
        String decimalPart = parts.length > 1 ? parts[1] : "";
        if (!integerPart.equals("0")) {
            int unitIndex = 0;
            boolean isZero = false;
            for (int i = integerPart.length() - 1; i >= 0; i--) {
                int digit = integerPart.charAt(i) - '0';
                if (digit == 0) {
                    isZero = true;
                    if (unitIndex == 4 || unitIndex == 8) {
                        sb.insert(0, CN_UNITS[unitIndex]);
                    }
                } else {
                    if (isZero) {
                        sb.insert(0, CN_ZERO);
                    }
                    sb.insert(0, CN_NUMBERS[digit]).insert(1, CN_UNITS[unitIndex]);
                    isZero = false;
                }
                unitIndex++;
            }
            sb.append(CN_DOLLAR);
        }
        if (!decimalPart.equals("")) {
            int tenCents = decimalPart.charAt(0) - '0';
            int cents = decimalPart.length() > 1 ? decimalPart.charAt(1) - '0' : 0;
            if (tenCents + cents == 0) {
                sb.append(CN_INTEGER);
            } else {
                if (tenCents != 0) {
                    sb.append(CN_NUMBERS[tenCents]).append(CN_TEN_CENTS);
                }
                if (cents != 0) {
                    sb.append(CN_NUMBERS[cents]).append(CN_CENTS);
                }
            }
        } else {
            sb.append(CN_INTEGER);
        }
        return sb.toString();
    }
}