金钱转换类

public class MoneyFormatUtil {　　／／分转换成元    public static String format_fen_as_yuan(int money_fen) {        float money_yuan = new BigDecimal(money_fen / 100f).setScale(2, BigDecimal.ROUND_HALF_UP).floatValue();        return format(money_yuan);    }

    /**     * @param @param  money     * @param @return     * @return String     * @throws     * @Description: 格式化，保留小数点后两位     */    public static String format(float money_yuan) {        String str = money_yuan + "";        int pos = str.indexOf(".");        if (pos < 0)            return str;        else {            String pre = str.substring(0, pos);            String last = str.substring(pos + 1);            try {                int xiaoshu = Integer.parseInt(last);                if (xiaoshu == 0) {                    return pre;                }            } catch (NumberFormatException ex) {                ex.printStackTrace();            }        }        DecimalFormat df = new DecimalFormat("##0.00");        return df.format(money_yuan);    }}

／／元转换为分 用法Money.fromYuan(yuan).fen();

public class Money implements Serializable, Parcelable {    BigDecimal value_bigDecimal;    int value_fen;    float value_yuan;

    public Money(int value_fen) {        this.value_fen = value_fen;        value_bigDecimal = new BigDecimal(value_fen);        this.value_yuan = value_bigDecimal.setScale(2, BigDecimal.ROUND_HALF_UP).floatValue();    }

    public Money(Parcel in) {        this(in.readInt());    }

    public static Money fromFen(String fen) {        return new Money(Integer.parseInt(fen));    }

    public static Money fromFen(int fen) {        return new Money(fen);    }

    public static Money fromYuan(String yuan_money_str) {        float money_shishou_yuan = Float.parseFloat(yuan_money_str);        return fromYuan(money_shishou_yuan);    }　    public static Money fromYuan(float money_shishou_yuan) {        int fen = new BigDecimal(money_shishou_yuan).multiply(new BigDecimal(100)).setScale(2, BigDecimal.ROUND_HALF_UP).intValue();        Money money = new Money(fen);        return money;    }

    public int fen() {        return value_fen;    }

    public float yuan() {        return value_yuan;    }

    public BigDecimal toBigDecimalValue() {        return value_bigDecimal;    }

    /**     * 显示金额，比如: 3.1 （元，不包含单位）     *     * @return     */    public String toStringAsYuan() {        return MoneyFormatUtil.format_fen_as_yuan(value_fen);    }

    public Money multiply(BigDecimal num) {        return new Money(new BigDecimal(value_fen).multiply(num).intValue());    }

    public Money divide(BigDecimal num) {        return new Money(new BigDecimal(value_fen).divide(num).intValue());    }

    public Money add(BigDecimal num) {        return new Money(new BigDecimal(value_fen).add(num).intValue());    }

    public Money subtract(BigDecimal num) {        return new Money(new BigDecimal(value_fen).subtract(num).intValue());    }

    @Override    public String toString() {        return toStringAsYuan();    }

    @Override    public int describeContents() {        return 0;    }

    @Override    public void writeToParcel(Parcel dest, int flags) {        dest.writeInt(value_fen);    }

    public static final Parcelable.Creator<Money> CREATOR = new Parcelable.Creator<Money>() {        public Money createFromParcel(Parcel in) {            return new Money(in);        }

        public Money[] newArray(int size) {            return new Money[size];        }    };

}