这个类的最初版本曾经发在我的另一个博客：
/codejar/archive//02/15/2352606.html
这里贴的是refactor后的最新版，新版支持传入String类型的数字。
这里是一个示例程序及输出：
import java.util.Arrays;import java.util.List;public class NumberTextTest {public static void main(String[] args) {List<String> numbers = Arrays.asList("1","123","123456789","101","1001","100000","1000300000250000004","205734908570001","1348900");NumberText nt = NumberText.getInstance(NumberText.Lang.ChineseSimplified);for(String number : numbers)System.out.println(nt.getText(number));System.out.println("---");nt = NumberText.getInstance(NumberText.Lang.English);for(String number : numbers)System.out.println(nt.getText(number));}}
输出如下：
run:一一百二十三一亿二千三百四十五万六千七百八十九一百零一一千零一一十万一百京零三百兆零二亿五千万零四二百零五兆七千三百四十九亿零八百五十七万零一一百三十四万八千九百---oneone hundred and twenty threeone hundred and twenty three million four hundred and fifty six thousand seven hundred and eighty nineone hundred and oneone thousand and oneone hundred thousand one quintillion three hundred trillion two hundred and fifty million and fourtwo hundred and five trillion seven hundred and thirty four billion nine hundred and eight million five hundred and seventy thousand and oneone million three hundred and fourty eight thousand nine hundredBUILD SUCCESSFUL (total time: 0 seconds)
另外这个工具还支持中文大写：
NumberText.getInstance(NumberText.Lang.ChineseTraditional);
NumberText.java 的源代码如下：
/* * Copyright na.shi.wu.you (raistlic@) * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * /licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */import java.util.HashMap;import java.util.Map;/*** This class transfers an integer number into a string :* * <br/>* * <pre>{@code* // an example :* NumberText ns = NumberText.getInstance(NumberText.Lang.EnglishWithDash);* ns.getText(123) // one hundred and twenty-three* ns.getOrdinalText(320) // three hundred and twentieth* }</pre>* * @date 09/02/* @author na.shi.wu.you (raistlic@)*/public abstract class NumberText {/*----------------------------------------------------------------------------* not designed to be inherented outside this file* no public constructors provided, -- use factory method---------------------------------------------------------------------------*/private NumberText() {}/*** Exports a {@code NumberText} implementation instance, based on a natural * language argument. {@see Lang}* * @param lang* @return a NumberText instance.*/public static NumberText getInstance(Lang lang) {return lang.instance();}/*** Transfers an integer number into a String, specifically in which language * depends on the implementation.* <p />* e.g. in EnglishWithDash,* <p />* 100 -> one hundred* <br />* -976083854 -> minus nine hundred and seventy-six million and eighty-three * thousand eight hundred and fifty-four* * @param number the integer number to be transfered* @return the result String*/public final String getText(long number) {return getText(Long.toString(number));}/*** Transfers an integer number into a String, specifically in which language * depends on the implementation.* <p />* e.g. in EnglishWithDash,* <p />* 100 -> one hundred* <br />* -976083854 -> minus nine hundred and seventy-six million and eighty-three * thousand eight hundred and fifty-four* * @param number the integer number to be transfered* @return the result String*/public abstract String getText(String number);/*** Transfers an integer number into a String of its ordinal representation, * specifically in which language depends on the implementation.* <p />* e.g. in EnglishWithDash,* <p />* 100 -> one hundredth* <br />* 8331125 -> eight million three hundred and thirty-one thousand one * hundred and twenty-fifth* * @param number the integer number to be transfered* @return the result String*/public final String getOrdinalText(long number) {return getOrdinalText(Long.toString(number));}/*** <p>* Transfers an integer number into a String of its ordinal representation, * specifically in which language depends on the implementation.* </p>* * <p>* e.g. in EnglishWithDash,* <br /><br />* 100 -> one hundredth* <br />* 8331125 -> eight million three hundred and thirty-one thousand one * hundred and twenty-fifth* </p>* * @param number the integer number to be transfered* @return the result String*/public abstract String getOrdinalText(String number);/*** This enumeration type is typically named under a natural language * name, and is to mark a specific implementation name; it is used as an * argument to call the factory method * {@link NumberText#getInstance(NumberText.Lang)}.*/public static enum Lang {English (NumberTextEnglishCleanSpaceOnly.INSTANCE),EnglishWithDash(NumberTextEnglish.INSTANCE),ChineseSimplified (NumberTextChinese.SIMPLIFIED),ChineseTraditional (NumberTextChinese.TRADITIONAL),;private final NumberText instance;private Lang(NumberText instance) {this.instance = instance;}private NumberText instance() {if( instance == null )throw new UnsupportedOperationException("Language not supported yet : " + this);return instance;}}abstract int limit();void checkNumber(String number) {if( !number.matches("-?\\d+") )throw new NumberFormatException();int length = number.length();if( number.startsWith("-") )length --;if( length > limit() )throw new UnsupportedOperationException("The current " + NumberText.class.getSimpleName() +"can only handle numbers up to (+/-)10^" + limit() + ".");}/*----------------------------------------------------------------------------* EnglishWithDash Implementation---------------------------------------------------------------------------*/private static class NumberTextEnglish extends NumberText {private static final NumberText INSTANCE = new NumberTextEnglish();static enum Connect {Minus("minus"),Hundred ("hundred"),And ("and"),AfterMinus(" "),AfterNumber (" "),AfterPower(" "),AfterHundred (" "),AfterAnd (" "),AfterTen ("-"),;final String display;Connect(String display) { this.display = display; }private static boolean isConnect(char c) {return c == ' ' || c == '-';}}static enum Power {Thousand("thousand"),// 10 ^ 3Million ("million"), // 10 ^ 6Billion ("billion"), // 10 ^ 9Trillion("trillion"),// 10 ^ 12Quadrillion ("quadrillion"), // 10 ^ 15Quintillion ("quintillion"), // 10 ^ 18 (enough for Long.MAX_VALUE)Sextillion ("sextillion"), // 10 ^ 21Septillion ("septillion"), // 10 ^ 24Octillion ("octillion"), // 10 ^ 27Nonillion ("nonillion"), // 10 ^ 30Decillion ("decillion"), // 10 ^ 33Undecillion ("undecillion"), // 10 ^ 36Duodecillion("duodecillion"),// 10 ^ 39Tredecillion("tredecillion"),// 10 ^ 42Quattuordecillion ("quattuordecillion"), // 10 ^ 45Quindecillion("quindecillion"),// 10 ^ 48Sexdecillion("sexdecillion"),// 10 ^ 51Septendecillion ("septendecillion"), // 10 ^ 54Octodecillion("octodecillion"),// 10 ^ 57Novemdecillion ("novemdecillion"), // 10 ^ 60Vigintillion("vigintillion"),// 10 ^ 63;final String display;Power(String display) { this.display = display; }}static enum Digit {Zero ("zero", "zeroth", "ten", ""),One ("one", "first", "eleven", "ten"),Two ("two", "second", "twelve", "twenty"),Three ("three", "third", "thirteen", "thirty"),Four ("four", "fourth", "fourteen", "fourty"),Five ("five", "fifth", "fifteen", "fifty"),Six ("six", "sixth", "sixteen", "sixty"),Seven ("seven", "seventh", "seventeen", "seventy"),Eight ("eight", "eighth", "eighteen", "eighty"),Nine ("nine", "nineth", "nineteen", "ninety"),;final String display, displayOrdinal, plusTen, multiTen;Digit(String display, String displayOrdinal, String plusTen, String multiTen) {this.display = display;this.displayOrdinal = displayOrdinal;this.plusTen = plusTen;this.multiTen = multiTen;}}private static final Map<String, String> _Ordinals;static {_Ordinals = new HashMap<String, String>();for(Digit d : Digit.values())_Ordinals.put(d.display, d.displayOrdinal);}@Overrideint limit() {return 63;}@Overridepublic String getText(String number) {checkNumber(number);StringBuilder builder = new StringBuilder();buildText(builder, number);return builder.toString();}@Overridepublic String getOrdinalText(String number) {checkNumber(number);StringBuilder builder = new StringBuilder();buildText(builder, number);replaceLastTokenWithOrdinal(builder);return builder.toString();}private void buildText(StringBuilder builder, String number) {assert builder != null;if( number.startsWith("-") ) {builder.append(getConnectDisplay(Connect.Minus)).append(getConnectDisplay(Connect.AfterMinus));number = number.substring(1);}int power = 0;while(number.length() > (power + 1) * 3)power++;while(power > 0) {boolean modified = extendToken(builder, number, power * 3);if( modified )builder.append(getConnectDisplay(Connect.AfterNumber)).append(getPowerDisplay(Power.values()[power-1]));power--;}extendToken(builder, number, 0);}private boolean extendToken(StringBuilder builder, String number, int suffix) {assert builder != null && suffix < number.length();int len = number.length() - suffix;int hundreds = len > 2 ? (int)(number.charAt(len-3)-'0') : -1;int tens = len > 1 ? (int)(number.charAt(len-2)-'0') : -1;int inds = (int)(number.charAt(len-1)-'0');if( hundreds <= 0 && tens <= 0 && inds <= 0 && suffix > 0 )return false;else if( len > 3 )builder.append(getConnectDisplay(Connect.AfterPower));if( hundreds == 0 ) {if( len > 3 && (tens > 0 || inds > 0) )builder.append(getConnectDisplay(Connect.And)).append(getConnectDisplay(Connect.AfterAnd));}else if( hundreds > 0 ) {builder.append(getDigitName(Digit.values()[hundreds])).append(getConnectDisplay(Connect.AfterNumber)).append(getConnectDisplay(Connect.Hundred));if( tens > 0 || inds > 0 ) builder.append(getConnectDisplay(Connect.AfterHundred)).append(getConnectDisplay(Connect.And)).append(getConnectDisplay(Connect.AfterAnd));}if( tens > 1 ) {builder.append(getDigitMultiTen(Digit.values()[tens]));if( inds > 0 )builder.append(getConnectDisplay(Connect.AfterTen));}if( tens == 1 )builder.append(getDigitPlusTen(Digit.values()[inds]));else if( inds > 0 || number.length() == 1 )builder.append(getDigitName(Digit.values()[inds]));return true;}private void replaceLastTokenWithOrdinal(StringBuilder builder) {assert builder != null && builder.length() > 0;int suffix = builder.length()-1;while( suffix >= 0 && !isConnect(builder.charAt(suffix)) ) suffix--;String lastToken = builder.substring(suffix+1);builder.delete(suffix+1, builder.length()).append(toOrdinal(lastToken));}String getPowerDisplay(Power power) {assert power != null;return power.display; }String getConnectDisplay(Connect connect) {assert connect != null;return connect.display;}String getDigitName(Digit digit) {assert digit != null;return digit.display;}String toOrdinal(String name) {assert name != null && !name.isEmpty();String result = _Ordinals.get(name);if( result == null ) {if( name.charAt(name.length()-1) == 'y' )result = name.substring(0, name.length()-1) + "ieth";elseresult = name + "th";}return result;}String getDigitPlusTen(Digit digit) {assert digit != null;return digit.plusTen;}String getDigitMultiTen(Digit digit) {assert digit != null;return digit.multiTen;}boolean isConnect(char c) {return Connect.isConnect(c);}}/*----------------------------------------------------------------------------* EnglishWithDash with only Clean Space Connectors---------------------------------------------------------------------------*/private static class NumberTextEnglishCleanSpaceOnly extends NumberTextEnglish {private static final NumberText INSTANCE = new NumberTextEnglishCleanSpaceOnly();@OverrideString getConnectDisplay(Connect connect) {return connect == Connect.AfterTen ? " " : super.getConnectDisplay(connect);}}/*----------------------------------------------------------------------------* ChineseSimplified Implementation---------------------------------------------------------------------------*/private static class NumberTextChinese extends NumberText {private static final NumberText SIMPLIFIED = new NumberTextChinese(Type.Simplified);private static final NumberText TRADITIONAL =new NumberTextChinese(Type.Traditional);static enum Type { Simplified, Traditional; }static enum Connect {Di("第", "第"),Fu("负", "負"),Ling ("零", "零"),Shi ("十", "拾"),Bai ("百", "佰"),Qian ("千", "仟"),;final String display, displayTraditional;Connect(String display, String displayTraditional) { this.display = display; this.displayTraditional = displayTraditional;}}static enum Power {Wan ("万", "萬"), // 10^4Yi("亿", "億"), // 10^8Zhao ("兆", "兆"), // 10^12Jing ("京", "京"), // 10^16 (enough for Long.MAX_VALUE)Gai ("垓", "垓"), // 10^20Zi("秭", "秭"), // 10^24Rang ("穰", "穰"), // 10^28Gou ("沟", "溝"), // 10^32Jian ("涧", "澗"), // 10^36Zheng ("正", "正"), // 10^40Zai ("载", "載"), // 10^44;final String display, displayTraditional;Power(String display, String displayTraditional) { this.display = display; this.displayTraditional = displayTraditional;}}static enum Digit {Ling ("零", "零"), // just to occupy this positionYi("一", "壹"),Er("二", "贰"),San ("三", "叁"),Si("四", "肆"),Wu("五", "伍"),Liu ("六", "陆"),Qi("七", "柒"),Ba("八", "捌"),Jiu ("九", "玖"),;final String display, displayTraditional;Digit(String display, String displayTraditional) { this.display = display; this.displayTraditional = displayTraditional;}}private final Type type;private NumberTextChinese(Type type) {assert type != null;this.type = type;}@Overrideint limit() {return 44;}@Overridepublic String getText(String number) {checkNumber(number);StringBuilder builder = new StringBuilder();buildText(builder, number);return builder.toString();}@Overridepublic String getOrdinalText(String number) {checkNumber(number);StringBuilder builder = new StringBuilder().append(Connect.Di);buildText(builder, number);return builder.toString();}private void buildText(StringBuilder builder, String number) {assert builder != null;if( number.startsWith("-") ) {builder.append(getConnectDisplay(Connect.Fu));number = number.substring(1);}int power = 0;while(number.length() > (power + 1) * 4)power++;while(power > 0) {if( extendToken(builder, number, power * 4) )builder.append(getPowerDisplay(Power.values()[power-1]));power--;}extendToken(builder, number, 0);}private boolean extendToken(StringBuilder builder, String number, int suffix) {assert builder != null && number.length() > suffix;int len = number.length() - suffix;int qian = len > 3 ? (int)(number.charAt(len-4)-'0') : -1;int bai = len > 2 ? (int)(number.charAt(len-3)-'0') : -1;int shi = len > 1 ? (int)(number.charAt(len-2)-'0') : -1;int ind = (int)(number.charAt(len-1)-'0');boolean nonZero = false; // true if any of the digits is not zeroif( qian == 0 ) { if( bai > 0 || shi > 0 || ind > 0 ) builder.append(getConnectDisplay(Connect.Ling)); }else if( qian > 0 ){builder.append(getDigitDisplay(Digit.values()[qian])).append(getConnectDisplay(Connect.Qian));nonZero = true;}if( bai == 0 ) { if( qian > 0 && (shi > 0 || ind > 0) ) builder.append(getConnectDisplay(Connect.Ling)); }else if( bai > 0 ){builder.append(getDigitDisplay(Digit.values()[bai])).append(getConnectDisplay(Connect.Bai));nonZero = true;}if( shi == 0 ) { if( bai > 0 && ind > 0 ) builder.append(getConnectDisplay(Connect.Ling)); }else if( shi > 0 ){if( number.length() > 2 || shi != 1 )builder.append(getDigitDisplay(Digit.values()[shi]));builder.append(getConnectDisplay(Connect.Shi));nonZero = true;}if( ind == 0 ){boolean addZero = len == 1;for(int i=1; addZero && i<=suffix; i++) {if( number.charAt(i) != '0' )addZero = false;}if( addZero ) builder.append(getConnectDisplay(Connect.Ling));}else {builder.append(getDigitDisplay(Digit.values()[ind]));nonZero = true;}return nonZero;}String getConnectDisplay(Connect connect) {assert connect != null;return type == Type.Simplified ? connect.display : connect.displayTraditional;}String getPowerDisplay(Power power) {assert power != null;return type == Type.Simplified ? power.display : power.displayTraditional;}String getDigitDisplay(Digit digit) {assert digit != null;return type == Type.Simplified ? digit.display : digit.displayTraditional;}}}
