人民币大写转换

import java.math.BigDecimal;

/**
 * @author shaoyaojie 2010-08-20
 *
 */
public class ChineseMoney {

    // 数字表示
    private static char[] CHINESE_DIGIT= { '零', '壹', '贰', '叁', '肆', '伍', '陆', '柒', '捌', '玖' };

    // 单位无限大
    private static final String POS[] = new String[] { "分", "角", "元", "拾", "佰", "仟", "万", "拾", "佰", "仟", "亿" };

    /**
     * 将中文金额转换为数字金额(零～千兆)
     * 
     * @param chineseMoney
     *            中文金额字符串
     * @return 数字金额
     */
    public static String covertToDigital(String chineseMoney) {
        // 条件判断
        int yuanIndex = chineseMoney == null ? -1 : chineseMoney.indexOf('圆');
        if (yuanIndex < 0) {
            return "";
        }
        if (yuanIndex > 31) {
            return "数值过大！";
        }

        char nowChar;

        BigDecimal iResult = BigDecimal.ZERO;
        // 金额单位(圆,万,亿,兆)
        BigDecimal iMoneyUnit = BigDecimal.ZERO;
        // 数据单位
        BigDecimal iDataUnit = BigDecimal.ZERO;
        // 一万
        BigDecimal bdcTenThousand = new BigDecimal("10000");

        char[] moneyChar = chineseMoney.toCharArray();
        for (int i = moneyChar.length - 1; i > -1; i--) {
            nowChar = moneyChar[i];
            // 将中文数字字符转为 数字字符
            for (int k = CHINESE_DIGIT.length - 1; k >= 0; k--) {
                if (nowChar == CHINESE_DIGIT[k]) {
                    nowChar = (char) ('0' + k);
                    break;
                }
            }

            if (nowChar >= '0' && nowChar <= '9') {
                iResult = iResult.add(iDataUnit.multiply(new BigDecimal(nowChar - '0')));
            } else if (nowChar == '圆') {
                // 1
                iDataUnit = iMoneyUnit = BigDecimal.ONE;
            } else if (nowChar == '万') {
                // 10000
                iDataUnit = iMoneyUnit = bdcTenThousand;
            } else if (nowChar == '亿') {
                // 10000*10000
                iDataUnit = iMoneyUnit = bdcTenThousand.multiply(bdcTenThousand);
            } else if (nowChar == '兆') {
                // 10000*10000*1000
                iDataUnit = iMoneyUnit = bdcTenThousand.multiply(bdcTenThousand).multiply(bdcTenThousand);
            } else if (nowChar == '拾') {
                iDataUnit = iMoneyUnit.multiply(BigDecimal.TEN);
            } else if (nowChar == '佰') {
                iDataUnit = iMoneyUnit.multiply(new BigDecimal("100"));
            } else if (nowChar == '仟') {
                iDataUnit = iMoneyUnit.multiply(new BigDecimal("1000"));
            } else if (nowChar == '角') {
                iDataUnit = new BigDecimal("0.1");
            } else if (nowChar == '分') {
                iDataUnit = new BigDecimal("0.01");
            }
        }

        return iResult.toString();
    }

    /**
     * 将数字金额转换为中文金额(无限大)
     * 
     * @param money
     *            数字金额
     * @return 中文金额字符串
     */
    public String change(String money) {

        BigDecimal bdMoney = BigDecimal.ZERO;
        try {
            // 检查数字正确性,移除首位空格
            bdMoney = new BigDecimal(money);
        } catch (Exception ex) {
            throw new IllegalArgumentException("不是正确的数字金额!");
        }
        // 检查小数位长度
        money = bdMoney.toString();
        if (money.indexOf('.') >= 0 && (money.length() - money.indexOf('.')) > 3) {

            throw new IllegalArgumentException("不是正确的数字金额!");
        }

        // 得到纯净的 '0'~'9'的字符串
        money = bdMoney.multiply(new BigDecimal("100")).abs().toString();
        money = money.indexOf('.') >= 0 ? money.substring(0, money.indexOf('.')) : money;

        char nowChar;
        String posStr;
        int posIndex;
        boolean oldCharIsZero = true;
        StringBuilder stb = new StringBuilder();

        for (int i = money.length() - 1; i >= 0; i--) {

            nowChar = money.charAt(i);
            posIndex = money.length() - 1 - i;
            // 如果长度超出了表达长度,则从"拾", "佰", "仟", "万", "拾", "佰", "仟", "亿"重新统计
            posIndex = posIndex >= POS.length ? (posIndex - 3) % (POS.length - 3) + 3 : posIndex;
            posStr = POS[posIndex];

            if (nowChar == '0') {
                if (posStr == "亿" || posStr == "万" || posStr == "元") {
                    stb.append(posStr);
                }
                // 如果旧字符不是0,则追加零,否则 当前的零就不考虑
                if (!oldCharIsZero) {
                    stb.append("零");
                }
                oldCharIsZero = true;
            } else {
                oldCharIsZero = false;
                stb.append(posStr).append(CHINESE_DIGIT[nowChar - '0']);
            }
        }

        if (bdMoney.signum() == -1) {
            stb.append("负");
        }
        stb.reverse();
        String ret = stb.toString();
        while(ret.indexOf("亿万")>=0){
            ret = ret.replace("亿万", "亿");
        }
        ret = ret.indexOf("分") < 0 ? ret + "整" : ret;

        return ret;
    }
}

评论

2 楼 shaoyj84 2012-02-26  

呵呵,自己写的玩玩的。

1 楼 bardo 2011-04-17  

建议看看这一个

http://bardo.iteye.com/blog/983559