package com.ruoyi.production.utils;
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import java.math.BigDecimal;
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import java.math.RoundingMode;
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import java.util.Arrays;
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import java.util.HashSet;
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import java.util.Set;
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/**
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* <br>
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* 单位转换工具类
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* </br>
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*
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* @author deslrey
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* @version 1.0
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* @since 2026/03/30 15:07
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*/
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public class UnitUtils {
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private static final Set<String> WEIGHT_UNITS = new HashSet<>(Arrays.asList(
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"千克", "公斤", "kg", "KG", "kG",
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"克", "g", "G",
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"吨", "t", "T"
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));
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private static final Set<String> KG_UNITS = new HashSet<>(Arrays.asList("千克", "公斤", "kg", "KG", "kG"));
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private static final Set<String> G_UNITS = new HashSet<>(Arrays.asList("克", "g", "G"));
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private static final Set<String> TON_UNITS = new HashSet<>(Arrays.asList("吨", "t", "T"));
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/**
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* 判断是否为重量单位
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*/
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public static boolean isWeightUnit(String unit) {
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return unit != null && WEIGHT_UNITS.contains(unit.trim());
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}
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/**
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* 如果是重量单位，统一返回“吨”，否则返回原单位
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*/
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public static String normalizeUnit(String unit) {
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if (isWeightUnit(unit)) {
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return "吨";
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}
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return unit != null ? unit.trim() : "未知单位";
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}
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/**
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* 如果是重量单位，折算为“吨”，否则返回原值
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*/
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public static BigDecimal convertValueToTon(BigDecimal value, String unit) {
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if (value == null || unit == null) {
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return value != null ? value : BigDecimal.ZERO;
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}
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String trimmedUnit = unit.trim();
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if (KG_UNITS.contains(trimmedUnit)) {
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return value.divide(new BigDecimal("1000"), 6, RoundingMode.HALF_UP);
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} else if (G_UNITS.contains(trimmedUnit)) {
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return value.divide(new BigDecimal("1000000"), 6, RoundingMode.HALF_UP);
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} else if (TON_UNITS.contains(trimmedUnit)) {
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return value;
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}
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return value;
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}
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}
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