使用Java函数实现数字转中文大写

以下是一个使用Java函数实现数字转中文大写的示例代码：

public class NumberToChinese {
    private static final String[] CN_NUM = {"零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖"};
    private static final String[] CN_UNIT = {"", "拾", "佰", "仟"};
    private static final String[] CN_SECTION = {"", "万", "亿", "万亿"};

    public static String toChineseUpper(int number) {
        String result = "";
        if (number == 0) {
            return CN_NUM[0];
        }

        int unitIndex = 0;
        boolean needZero = false;
        while (number > 0) {
            int section = number % 10000;
            if (needZero) {
                result = CN_NUM[0] + result;
            }
            String sectionResult = sectionToChinese(section);
            sectionResult += (section != 0) ? CN_SECTION[unitIndex] : CN_SECTION[0];
            result = sectionResult + result;

            needZero = (section < 1000) && (section > 0);
            number = number / 10000;
            unitIndex++;
        }

        return result;
    }

    private static String sectionToChinese(int section) {
        String result = "";
        int unitIndex = 0;
        boolean zero = true;
        while (section > 0) {
            int v = section % 10;
            if (v == 0) {
                if (!zero) {
                    zero = true;
                    result = CN_NUM[v] + result;
                }
            } else {
                zero = false;
                result = CN_NUM[v] + CN_UNIT[unitIndex] + result;
            }
            section = section / 10;
            unitIndex++;
        }

        return result;
    }

    public static void main(String[] args) {
        int number = 1234567890;
        String chineseUpper = toChineseUpper(number);
        System.out.println(chineseUpper);  // 输出：壹拾贰亿叁仟肆佰伍拾陆万柒仟捌佰玖拾
    }
}

此代码将数字转换为中文大写，并可以处理亿级别的数字。运行该代码的main方法会打印出示例的转换结果"壹拾贰亿叁仟肆佰伍拾陆万柒仟捌佰玖拾"。你可以将需要转换的数字替换到main方法中的number变量。