BigDecimalUtils工具类

最新推荐文章于 2025-02-13 17:28:34 发布

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最新推荐文章于 2025-02-13 17:28:34 发布

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分类专栏： BigDecimal 文章标签： java

本文链接：https://blog.youkuaiyun.com/xj0_0xj/article/details/132603292

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需求

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调用工具类实现

public class BigDecimalUtils1 {
    public static BigDecimal customRound(BigDecimal number,BigDecimal carryBit) {
        int decimalLength = 0;

        if (carryBit.compareTo(new BigDecimal(10)) >= 0) {
            long longValue = carryBit.longValue();
            String intLength = String.valueOf(longValue);
            if (longValue == 10 || longValue == 100 || longValue == 1000 || longValue == 10000) {
                decimalLength = 0 - intLength.length() + 2;
            } else {
                decimalLength = 0 - intLength.length() + 1;
            }
        } else {
            decimalLength = carryBit.scale();
        }

        BigDecimal integerPart = number.setScale(decimalLength - 1, RoundingMode.DOWN);
        BigDecimal fractionPart = number.subtract(integerPart);

        if (number.compareTo(integerPart) == 0) {
            return number;
        }

        if (fractionPart.compareTo(carryBit) >= 0) {
            return number.setScale(decimalLength - 1,RoundingMode.UP).add(new BigDecimal(0));
        } else {
            return integerPart.add(carryBit);
        }
    }

    public static BigDecimal customRound2(BigDecimal number,BigDecimal carryBit) {
        int decimalLength = 0;

        if (carryBit.compareTo(new BigDecimal(10)) >= 0) {
            long longValue = carryBit.longValue();
            String intLength = String.valueOf(longValue);
            if (longValue == 10 || longValue == 100 || longValue == 1000 || longValue == 10000) {
                decimalLength = 0 - intLength.length() + 2;
            } else {
                decimalLength = 0 - intLength.length() + 1;
            }
        } else {
            decimalLength = carryBit.scale();
        }

        BigDecimal integerPart = number.setScale(decimalLength - 1, RoundingMode.DOWN);
        BigDecimal fractionPart = number.subtract(integerPart);

        if (number.compareTo(integerPart) == 0) {
            return number;
        }

        if (fractionPart.compareTo(carryBit) >= 0) {
            return number.setScale(decimalLength - 1,RoundingMode.UP).add(new BigDecimal(0));
        } else {
            return number.setScale(decimalLength - 1,RoundingMode.DOWN).add(new BigDecimal(0));
        }
    }

    public static BigDecimal customRound3(BigDecimal number,BigDecimal carryBit) {
        if (number.compareTo(new BigDecimal(1)) < 0) {
            return new BigDecimal(1);
        }

        int decimalLength = 0;

        if (carryBit.compareTo(new BigDecimal(10)) >= 0) {
            long longValue = carryBit.longValue();
            String intLength = String.valueOf(longValue);
            if (longValue == 10 || longValue == 100 || longValue == 1000 || longValue == 10000) {
                decimalLength = 0 - intLength.length() + 2;
            } else {
                decimalLength = 0 - intLength.length() + 1;
            }
        } else {
            decimalLength = carryBit.scale();
        }

        BigDecimal integerPart = number.setScale(decimalLength - 1, RoundingMode.DOWN);
        BigDecimal fractionPart = number.subtract(integerPart);

        if (number.compareTo(integerPart) == 0) {
            return number;
        }

        if (fractionPart.compareTo(carryBit) >= 0) {
            return number.setScale(decimalLength - 1,RoundingMode.UP).add(new BigDecimal(0));
        } else {
            return integerPart.add(carryBit);
        }
    }

    public static BigDecimal customRound4(BigDecimal number,BigDecimal carryBit) {
        if (number.compareTo(new BigDecimal(1)) < 0) {
            return new BigDecimal(1);
        }

        int decimalLength = 0;

        if (carryBit.compareTo(new BigDecimal(10)) >= 0) {
            long longValue = carryBit.longValue();
            String intLength = String.valueOf(longValue);
            if (longValue == 10 || longValue == 100 || longValue == 1000 || longValue == 10000) {
                decimalLength = 0 - intLength.length() + 2;
            } else {
                decimalLength = 0 - intLength.length() + 1;
            }
        } else {
            decimalLength = carryBit.scale();
        }

        BigDecimal integerPart = number.setScale(decimalLength - 1, RoundingMode.DOWN);
        BigDecimal fractionPart = number.subtract(integerPart);

        if (number.compareTo(integerPart) == 0) {
            return number;
        }

        if (fractionPart.compareTo(carryBit) >= 0) {
            return number.setScale(decimalLength - 1,RoundingMode.UP).add(new BigDecimal(0));
        } else {
            return number.setScale(decimalLength - 1,RoundingMode.DOWN).add(new BigDecimal(0));
        }
    }