用AI生成将数字金额转换为大写中文金额
文件名是AmountToChinese.javaimport java.math.BigDecimal; import java.math.RoundingMode; public class AmountToChinese { private static final String[] DIGITS {零, 壹, 贰, 叁, 肆, 伍, 陆, 柒, 捌, 玖}; private static final String[] INTEGER_UNITS {, 拾, 佰, 仟}; private static final String[] SECTION_UNITS {, 万, 亿, 兆}; /** * 将数字金额转换为大写中文金额 * * param amount 金额支持两位小数 * return 大写金额字符串例如1234.56 - 壹仟贰佰叁拾肆元伍角陆分 */ public static String amountToChinese(BigDecimal amount) { if (amount null) { throw new IllegalArgumentException(金额不能为空); } if (amount.compareTo(BigDecimal.ZERO) 0) { return 负 amountToChinese(amount.abs()); } if (amount.compareTo(new BigDecimal(999999999999999.99)) 0) { throw new IllegalArgumentException(金额超出支持范围); } amount amount.setScale(2, RoundingMode.HALF_UP); long integerPart amount.longValue(); int decimalPart amount.subtract(BigDecimal.valueOf(integerPart)) .movePointRight(2) .intValue(); int jiao decimalPart / 10; int fen decimalPart % 10; StringBuilder result new StringBuilder(); if (integerPart 0) { if (jiao 0 fen 0) { return 零元整; } result.append(零元); } else { result.append(convertInteger(integerPart)).append(元); } if (jiao 0 fen 0) { result.append(整); } else if (jiao 0) { if (integerPart ! 0) { result.append(零); } result.append(DIGITS[fen]).append(分); } else { result.append(DIGITS[jiao]).append(角); if (fen ! 0) { result.append(DIGITS[fen]).append(分); } } return result.toString(); } /** * 将 double 类型金额转换为大写中文金额 */ public static String amountToChinese(double amount) { return amountToChinese(BigDecimal.valueOf(amount)); } private static String convertInteger(long num) { if (num 0) { return 零; } StringBuilder result new StringBuilder(); boolean needZeroBetweenSections false; int sectionIndex 0; while (num 0) { int section (int) (num % 10000); if (section ! 0) { if (needZeroBetweenSections result.length() 0) { result.insert(0, 零); } result.insert(0, convertSection(section) SECTION_UNITS[sectionIndex]); needZeroBetweenSections section 1000; } else { needZeroBetweenSections true; } num / 10000; sectionIndex; } return result.toString(); } private static String convertSection(int section) { StringBuilder result new StringBuilder(); boolean lastWasZero true; int unitIndex 0; while (section 0) { int digit section % 10; if (digit 0) { if (!lastWasZero) { result.insert(0, 零); lastWasZero true; } } else { result.insert(0, DIGITS[digit] INTEGER_UNITS[unitIndex]); lastWasZero false; } unitIndex; section / 10; } return result.toString(); } public static void main(String[] args) { double[] testAmounts { 0, 0.01, 0.1, 0.05, 0.56, 1, 10, 10.01, 100.5, 1001, 1234.56, 10000, 100000001, 101000000, 1234567890.12 }; System.out.println(数字金额 - 大写金额); System.out.println(----------------------------------------); for (double amount : testAmounts) { System.out.printf(%-18s - %s%n, formatAmount(amount), amountToChinese(amount)); } } private static String formatAmount(double amount) { return BigDecimal.valueOf(amount).setScale(2, RoundingMode.HALF_UP).toPlainString(); } }
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