71 lines
2.3 KiB
Java
71 lines
2.3 KiB
Java
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package com.guahao.common.util;
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import java.math.BigDecimal;
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import java.math.RoundingMode;
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/**
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* 金额处理工具类
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*/
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public final class AmountUtil {
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private AmountUtil() {
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throw new AssertionError("No instances for utility class");
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}
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/**
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* 将字符串金额转换为 BigDecimal
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* 支持格式： "123", "123.45", " 123.45 ", "-123.45", "+123.45"
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*
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* @param amountStr 金额字符串
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* @return BigDecimal 对象，如果输入为 null 或无效格式，返回 BigDecimal.ZERO
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*/
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public static BigDecimal parseAmount(String amountStr) {
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return parseAmount(amountStr, BigDecimal.ZERO);
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}
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/**
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* 将字符串金额转换为 BigDecimal，支持指定默认值
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*
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* @param amountStr 金额字符串
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* @param defaultValue 解析失败时返回的默认值
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* @return BigDecimal 对象
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*/
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public static BigDecimal parseAmount(String amountStr, BigDecimal defaultValue) {
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if (amountStr == null || amountStr.trim().isEmpty()) {
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return defaultValue;
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}
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try {
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return new BigDecimal(amountStr.trim());
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} catch (NumberFormatException e) {
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System.err.println("金额格式错误: " + amountStr);
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return defaultValue;
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}
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}
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/**
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* 将字符串金额转换为 BigDecimal，并指定小数位数和舍入模式
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*
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* @param amountStr 金额字符串
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* @param scale 保留小数位数（如 2 表示保留两位小数）
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* @param roundingMode 舍入模式，如 RoundingMode.HALF_UP（四舍五入）
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* @return BigDecimal 对象，格式错误或 null 返回 0.00
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*/
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public static BigDecimal parseAmount(String amountStr, int scale, RoundingMode roundingMode) {
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BigDecimal amount = parseAmount(amountStr, BigDecimal.ZERO);
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return amount.setScale(scale, roundingMode);
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}
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/**
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* 安全比较两个金额字符串大小
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*
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* @param a 金额A
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* @param b 金额B
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* @return a > b 返回 1, a < b 返回 -1, a == b 返回 0
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*/
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public static int compare(String a, String b) {
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BigDecimal amountA = parseAmount(a, BigDecimal.ZERO);
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BigDecimal amountB = parseAmount(b, BigDecimal.ZERO);
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return amountA.compareTo(amountB);
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}
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}
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