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refactor(util): 重构KitBigDecimalUtil类提高精度控制和数据类型支持

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This commit is contained in:
odboy
2026-01-30 19:02:50 +08:00
parent c828e27b95
commit ae1de44b2c
2 changed files with 101 additions and 68 deletions
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cutejava-springboot3/cutejava-framework/src/main/java/cn/odboy/util/KitBigDecimalUtil.java
+52 -35
View File
@@ -16,6 +16,7 @@
package cn.odboy.util;
import lombok.experimental.UtilityClass;
import java.math.BigDecimal;
import java.math.RoundingMode;
import java.text.NumberFormat;
@@ -33,17 +34,21 @@ public final class KitBigDecimalUtil {
* @return 转换后的 BigDecimal
*/
private static BigDecimal toBigDecimal(Object obj) {
if (obj instanceof BigDecimal) {
return (BigDecimal) obj;
} else if (obj instanceof Long) {
return BigDecimal.valueOf((Long) obj);
} else if (obj instanceof Integer) {
return BigDecimal.valueOf((Integer) obj);
} else if (obj instanceof Double) {
return new BigDecimal(String.valueOf(obj));
} else {
throw new IllegalArgumentException("Unsupported type");
return switch (obj) {
case BigDecimal result -> result;
case Long result -> BigDecimal.valueOf(result);
case Integer result -> BigDecimal.valueOf(result.longValue());
case Short result -> BigDecimal.valueOf(result.longValue());
case Byte result -> BigDecimal.valueOf(result.longValue());
case Double result -> BigDecimal.valueOf(result);
case Float result -> BigDecimal.valueOf(result.doubleValue());
case String result -> new BigDecimal(result);
case Number result -> BigDecimal.valueOf(result.doubleValue());
case null, default -> {
assert obj != null;
throw new IllegalArgumentException("Unsupported type: " + obj.getClass().getName());
}
};
}
/**
@@ -51,12 +56,12 @@ public final class KitBigDecimalUtil {
*
* @param a 加数
* @param b 加数
* @return 两个加数的和, 保留两位小数
* @return 两个加数的和,
*/
public static BigDecimal add(Object a, Object b) {
BigDecimal bdA = toBigDecimal(a);
BigDecimal bdB = toBigDecimal(b);
return bdA.add(bdB).setScale(2, RoundingMode.HALF_UP);
return bdA.add(bdB);
}
/**
@@ -64,12 +69,12 @@ public final class KitBigDecimalUtil {
*
* @param a 被减数
* @param b 减数
* @return 两数的差, 保留两位小数
* @return 两数的差,
*/
public static BigDecimal subtract(Object a, Object b) {
BigDecimal bdA = toBigDecimal(a);
BigDecimal bdB = toBigDecimal(b);
return bdA.subtract(bdB).setScale(2, RoundingMode.HALF_UP);
return bdA.subtract(bdB);
}
/**
@@ -82,7 +87,7 @@ public final class KitBigDecimalUtil {
public static BigDecimal multiply(Object a, Object b) {
BigDecimal bdA = toBigDecimal(a);
BigDecimal bdB = toBigDecimal(b);
return bdA.multiply(bdB).setScale(6, RoundingMode.HALF_UP);
return bdA.multiply(bdB);
}
/**
@@ -90,37 +95,23 @@ public final class KitBigDecimalUtil {
*
* @param a 被除数
* @param b 除数
* @return 两数的商，保留两位小数
* @return 两数的商
*/
public static BigDecimal divide(Object a, Object b) {
BigDecimal bdA = toBigDecimal(a);
BigDecimal bdB = toBigDecimal(b);
return bdA.divide(bdB, 6, RoundingMode.HALF_UP);
}
/**
* 除法
*
* @param a 被除数
* @param b 除数
* @param scale 保留小数位数
* @return 两数的商，保留两位小数
*/
public static BigDecimal divide(Object a, Object b, int scale) {
BigDecimal bdA = toBigDecimal(a);
BigDecimal bdB = toBigDecimal(b);
return bdA.divide(bdB, scale, RoundingMode.HALF_UP);
return bdA.divide(bdB, 6, RoundingMode.DOWN);
}
/**
* 分转元
*
* @param obj 分的金额
* @return 转换后的元，保留两位小数
* @return 转换后的元
*/
public static BigDecimal centsToYuan(Object obj) {
BigDecimal cents = toBigDecimal(obj);
return cents.divide(BigDecimal.valueOf(100), 2, RoundingMode.HALF_UP);
return cents.divide(BigDecimal.valueOf(100), 6, RoundingMode.DOWN);
}
/**
@@ -129,9 +120,29 @@ public final class KitBigDecimalUtil {
* @param obj 元的金额
* @return 转换后的分
*/
public static Long yuanToCents(Object obj) {
public static long yuanToCents(Object obj) {
BigDecimal yuan = toBigDecimal(obj);
return yuan.multiply(BigDecimal.valueOf(100)).setScale(0, RoundingMode.HALF_UP).longValue();
return yuan.multiply(BigDecimal.valueOf(100)).setScale(0, RoundingMode.HALF_EVEN).longValue();
}
/**
* 取整，采用银行家算法
*
* @param obj 金额
* @return /
*/
public static BigDecimal toRound(Object obj) {
return toBigDecimal(obj).setScale(0, RoundingMode.HALF_EVEN);
}
/**
* 取整，采用银行家算法
*
* @param obj 金额
* @return /
*/
public static long toRoundLong(Object obj) {
return toBigDecimal(obj).setScale(0, RoundingMode.HALF_EVEN).longValue();
}
/**
@@ -162,5 +173,11 @@ public final class KitBigDecimalUtil {
System.out.println("分转元结果: " + centsToYuan(cents));
BigDecimal yuan = new BigDecimal("123.45");
System.out.println("元转分结果: " + yuanToCents(yuan));
BigDecimal toRo = new BigDecimal("123.1548456");
System.out.println("取整: " + toRound(toRo));
BigDecimal toRoLong = new BigDecimal("123.1548456");
System.out.println("取整转long: " + toRoundLong(toRoLong));
BigDecimal formatGa = new BigDecimal("1231548456123123");
System.out.println("格式化千分位: " + formatGroupingAmount(formatGa));
}
}
cutejava/cutejava-framework/src/main/java/cn/odboy/util/KitBigDecimalUtil.java
+48 -32
View File
@@ -18,6 +18,7 @@ package cn.odboy.util;
import java.math.BigDecimal;
import java.math.RoundingMode;
import java.text.NumberFormat;
import lombok.experimental.UtilityClass;
/**
@@ -35,14 +36,17 @@ public final class KitBigDecimalUtil {
private static BigDecimal toBigDecimal(Object obj) {
if (obj instanceof BigDecimal) {
return (BigDecimal) obj;
} else if (obj instanceof Long) {
return BigDecimal.valueOf((Long) obj);
} else if (obj instanceof Integer) {
return BigDecimal.valueOf((Integer) obj);
} else if (obj instanceof Double) {
return new BigDecimal(String.valueOf(obj));
} else if (obj instanceof Long || obj instanceof Integer ||
obj instanceof Short || obj instanceof Byte) {
return BigDecimal.valueOf(((Number) obj).longValue());
} else if (obj instanceof Double || obj instanceof Float) {
return BigDecimal.valueOf(((Number) obj).doubleValue());
} else if (obj instanceof String) {
return new BigDecimal((String) obj);
} else if (obj instanceof Number) {
return BigDecimal.valueOf(((Number) obj).doubleValue());
} else {
throw new IllegalArgumentException("Unsupported type");
throw new IllegalArgumentException("Unsupported type: " + obj.getClass().getName());
}
}
@@ -51,12 +55,12 @@ public final class KitBigDecimalUtil {
*
* @param a 加数
* @param b 加数
* @return 两个加数的和, 保留两位小数
* @return 两个加数的和,
*/
public static BigDecimal add(Object a, Object b) {
BigDecimal bdA = toBigDecimal(a);
BigDecimal bdB = toBigDecimal(b);
return bdA.add(bdB).setScale(2, RoundingMode.HALF_UP);
return bdA.add(bdB);
}
/**
@@ -64,12 +68,12 @@ public final class KitBigDecimalUtil {
*
* @param a 被减数
* @param b 减数
* @return 两数的差, 保留两位小数
* @return 两数的差,
*/
public static BigDecimal subtract(Object a, Object b) {
BigDecimal bdA = toBigDecimal(a);
BigDecimal bdB = toBigDecimal(b);
return bdA.subtract(bdB).setScale(2, RoundingMode.HALF_UP);
return bdA.subtract(bdB);
}
/**
@@ -82,7 +86,7 @@ public final class KitBigDecimalUtil {
public static BigDecimal multiply(Object a, Object b) {
BigDecimal bdA = toBigDecimal(a);
BigDecimal bdB = toBigDecimal(b);
return bdA.multiply(bdB).setScale(6, RoundingMode.HALF_UP);
return bdA.multiply(bdB);
}
/**
@@ -90,37 +94,23 @@ public final class KitBigDecimalUtil {
*
* @param a 被除数
* @param b 除数
* @return 两数的商，保留两位小数
* @return 两数的商
*/
public static BigDecimal divide(Object a, Object b) {
BigDecimal bdA = toBigDecimal(a);
BigDecimal bdB = toBigDecimal(b);
return bdA.divide(bdB, 6, RoundingMode.HALF_UP);
}
/**
* 除法
*
* @param a 被除数
* @param b 除数
* @param scale 保留小数位数
* @return 两数的商，保留两位小数
*/
public static BigDecimal divide(Object a, Object b, int scale) {
BigDecimal bdA = toBigDecimal(a);
BigDecimal bdB = toBigDecimal(b);
return bdA.divide(bdB, scale, RoundingMode.HALF_UP);
return bdA.divide(bdB, 6, RoundingMode.DOWN);
}
/**
* 分转元
*
* @param obj 分的金额
* @return 转换后的元，保留两位小数
* @return 转换后的元
*/
public static BigDecimal centsToYuan(Object obj) {
BigDecimal cents = toBigDecimal(obj);
return cents.divide(BigDecimal.valueOf(100), 2, RoundingMode.HALF_UP);
return cents.divide(BigDecimal.valueOf(100), 6, RoundingMode.DOWN);
}
/**
@@ -129,9 +119,29 @@ public final class KitBigDecimalUtil {
* @param obj 元的金额
* @return 转换后的分
*/
public static Long yuanToCents(Object obj) {
public static long yuanToCents(Object obj) {
BigDecimal yuan = toBigDecimal(obj);
return yuan.multiply(BigDecimal.valueOf(100)).setScale(0, RoundingMode.HALF_UP).longValue();
return yuan.multiply(BigDecimal.valueOf(100)).setScale(0, RoundingMode.HALF_EVEN).longValue();
}
/**
* 取整，采用银行家算法
*
* @param obj 金额
* @return /
*/
public static BigDecimal toRound(Object obj) {
return toBigDecimal(obj).setScale(0, RoundingMode.HALF_EVEN);
}
/**
* 取整，采用银行家算法
*
* @param obj 金额
* @return /
*/
public static long toRoundLong(Object obj) {
return toBigDecimal(obj).setScale(0, RoundingMode.HALF_EVEN).longValue();
}
/**
@@ -162,5 +172,11 @@ public final class KitBigDecimalUtil {
System.out.println("分转元结果: " + centsToYuan(cents));
BigDecimal yuan = new BigDecimal("123.45");
System.out.println("元转分结果: " + yuanToCents(yuan));
BigDecimal toRo = new BigDecimal("123.1548456");
System.out.println("取整: " + toRound(toRo));
BigDecimal toRoLong = new BigDecimal("123.1548456");
System.out.println("取整转long: " + toRoundLong(toRoLong));
BigDecimal formatGa = new BigDecimal("1231548456123123");
System.out.println("格式化千分位: " + formatGroupingAmount(formatGa));
}
}