業務場景：
1.在人事業務系統開發的報表列印文書時經常需要將人民幣數值轉換為大寫， 所以用java寫了一個通用的大寫轉換函式。 為了更加方便呼叫函式的引數使用字串型別。例如：825.45 轉換後：捌佰貳拾伍元肆角伍分
2.在人事業務系統中經常把日期用漢字大寫表示，為了方便呼叫函式，也是使用字串型別。例如：2018 轉換後：二〇一八

下面為java程式碼

public class Data2Zh {
    final static private String NUMBER[] = { "零", "壹", "貳", "叄", "肆", "伍", "陸", "柒", "捌"
 
, "玖" };
    final static private String NUMBER2[] = { "〇", "一", "二", "三", "四", "五", "六", "七", "八", "九" };
    final static private String CBit[] = { "", "拾", "佰", "仟" };

    /*
     * 將數值大寫
     */
    public static String capitalization(String szNum) {
        StringBuilder resstr = new StringBuilder();
        String tmpstr = szNum.trim();
        int
 
 sl = tmpstr.length();
        int sp = 0;
        int dotpos = tmpstr.indexOf('.');
        if (dotpos != -1) {
            while (sl > 1 && tmpstr.charAt(sl - 1) == '0')
                sl--;
            if (tmpstr.charAt(sl - 1) == '.')
                sl--;
            if (sl != tmpstr.length()) {
                tmpstr = tmpstr.substring(0
 
, sl);
            }
        } else
            dotpos = sl;
        if (sl < 1)
            return NUMBER[0];
        if (tmpstr.charAt(0) == '-') {
            resstr.append("負");
            sp = 1;
        }
        String integerNum = tmpstr.substring(sp, dotpos - sp);
        String decimalNum = "";
        if (dotpos + 1 < sl)
            decimalNum = tmpstr.substring(dotpos + 1);
        sl = integerNum.length();
        sp = 0;
        while (sp < sl && integerNum.charAt(sp) == '0')
            sp++;
        if (sp > 0)
            integerNum = integerNum.substring(sp);
        int inl = integerNum.length();
        if (inl > 0) {
            int h = (inl - 1) % 4;
            int j = (inl - 1) / 4 + 1;
            sp = 0;
            boolean allzero = false;
            boolean preallzero = false;
            for (; j > 0; j--) {
                int k = h;
                h = 3;
                boolean preiszero = allzero;
                allzero = true;
                for (; k >= 0; k--, sp++) {
                    if (integerNum.charAt(sp) == '0')
                        preiszero = true;
                    else {
                        allzero = false;
                        if (preiszero)
                            resstr.append("零");
                        preiszero = false;
                        resstr.append(NUMBER[(byte) (integerNum.charAt(sp)) - 48]).append(CBit[k]);
                    }
                } // end for k
                if (/* j!=0 && */ j % 2 == 0) {
                    if (!allzero)
                        resstr.append("萬");
                } else {
                    if (!allzero || !preallzero) {
                        int repyi = j / 2;
                        for (int i = 0; i < repyi; i++)
                            resstr.append("億");
                    }
                }
                preallzero = allzero;
            } // end for j
        } else
            resstr.append("零");

        int dnl = decimalNum.length();
        if (dnl > 0) {
            resstr.append("點");
            for (int i = 0; i < dnl; i++) {
                resstr.append(NUMBER[(byte) (decimalNum.charAt(i)) - 48]);
            }
        }
        return resstr.toString();
    }

    /*
     * 獲得某一位上的數值，如果 nBit<0 則獲得小數點後面的位數
     */
    static public char getNumByte(String szNum, int nBit) {
        int sl = szNum.length();
        int nPos = 0;
        while (nPos < sl && szNum.charAt(nPos) != '.')
            nPos++;
        if (nBit < 0)
            nPos = nPos - nBit;
        else
            nPos = nPos - nBit - 1;
        if (nPos < 0 || nPos >= sl)
            return '0';
        return szNum.charAt(nPos);
    }

    public static String rmbChange(String rmb) {
        return capitalization((rmb.indexOf('.') >= 0 ? rmb.substring(0, rmb.indexOf('.')) : rmb)) + "元"
                + capitalization(String.valueOf(getNumByte(rmb, -1))) + "角"
                + capitalization(String.valueOf(getNumByte(rmb, -2))) + "分";
    }

    /*
     * 僅僅是把 0~9 轉換為 "〇","一","二","三","四","五","六","七","八","九"
     */
    public static String changeCN(String szNum) {
        StringBuilder sb = new StringBuilder();
        String str = szNum.trim();
        int sl = str.length();
        int sp = 0;

        if (sl < 1)
            return NUMBER2[0];
        for (; sp < sl; sp++)
            if (str.charAt(sp) >= '0' && str.charAt(sp) <= '9')
                sb.append(NUMBER2[str.charAt(sp) - '0']);
            else
                sb.append(str.charAt(sp));
        return sb.toString();
    }

    public static void main(String[] args) {
        System.out.println(rmbChange("825.45"));
        System.out.println(changeCN("2018"));
    }
}