多语言数字文本转换 - Java Number to Text Converter
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import java.util.EnumMap;
import java.util.HashMap;
import java.util.Map;
/**
* This class transfers an integer number into a string :
* <p />
* <pre>{@code
* // an example :
* NumberText ns = NumberText.getInstance(NumberText.Lang.English);
* ns.getText(123) // one hundred and twenty-three
* ns.getOrdinalText(320) // three hundred and twentieth
* }</pre>
*
* @date 09/02/2012
* @author na.shi.wu.you (raistlic@gmail.com)
*/
public abstract class NumberText {
/*----------------------------------------------------------------------------
* not designed to be inherented outside this file
* no public constructors provided, -- use factory method
---------------------------------------------------------------------------*/
private NumberText() {}
/**
* Transfers an integer number into a String, specifically in which language
* depends on the implementation.
* <p />
* e.g. in English,
* <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(long number);
/**
* Transfers an integer number into a String of its ordinal representation,
* specifically in which language depends on the implementation.
* <p />
* e.g. in English,
* <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 abstract String getOrdinalText(long 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,
EnglishWithCleanSpaceOnly,
ChineseSimplified,
ChineseTraditional,
;
}
/**
* 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) {
if( lang == null ) throw new NullPointerException();
NumberText result = null;
synchronized(_InstancePool) {
result = _InstancePool.get(lang);
if( result == null ) {
switch(lang) {
case English :
result = new NumberTextEnglish();
break;
case EnglishWithCleanSpaceOnly :
result = new NumberTextEnglishCleanSpaceOnly();
break;
case ChineseSimplified :
result = new NumberTextChinese(NumberTextChinese.Type.Simplified);
break;
case ChineseTraditional :
result = new NumberTextChinese(NumberTextChinese.Type.Traditional);
break;
default : throw new UnsupportedOperationException(
"Language not supported yet : " + lang);
}
_InstancePool.put(lang, result);
}
}
return result;
}
private static final Map<Lang, NumberText> _InstancePool =
new EnumMap<Lang, NumberText>(Lang.class);
private static boolean checkNumber(String number) {
return number != null && number.matches("[0-9]+");
}
/*----------------------------------------------------------------------------
* English Implementation
---------------------------------------------------------------------------*/
private static class NumberTextEnglish extends NumberText {
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 ^ 3
Million ("million"), // 10 ^ 6
Billion ("billion"), // 10 ^ 9
Trillion ("trillion"), // 10 ^ 12
Quadrillion ("quadrillion"), // 10 ^ 15
Quintillion ("quintillion"), // 10 ^ 18 (enough for Long.MAX_VALUE)
Sextillion ("sextillion"), // 10 ^ 21
Septillion ("septillion"), // 10 ^ 24
Octillion ("octillion"), // 10 ^ 27
Nonillion ("nonillion"), // 10 ^ 30
Decillion ("decillion"), // 10 ^ 33
Undecillion ("undecillion"), // 10 ^ 36
Duodecillion ("duodecillion"), // 10 ^ 39
Tredecillion ("tredecillion"), // 10 ^ 42
Quattuordecillion ("quattuordecillion"), // 10 ^ 45
Quindecillion ("quindecillion"), // 10 ^ 48
Sexdecillion ("sexdecillion"), // 10 ^ 51
Septendecillion ("septendecillion"), // 10 ^ 54
Octodecillion ("octodecillion"), // 10 ^ 57
Novemdecillion ("novemdecillion"), // 10 ^ 60
Vigintillion ("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);
}
@Override
public String getText(long number) {
StringBuilder builder = new StringBuilder();
buildText(builder, number);
return builder.toString();
}
@Override
public String getOrdinalText(long number) {
StringBuilder builder = new StringBuilder();
buildText(builder, number);
replaceLastTokenWithOrdinal(builder);
return builder.toString();
}
private void buildText(StringBuilder builder, long number) {
assert builder != null;
if( number < 0 ) {
builder.append(getConnectDisplay(Connect.Minus))
.append(getConnectDisplay(Connect.AfterMinus));
number = -number;
}
String numString = Long.toString(number);
int power = 0;
while(numString.length() > (power + 1) * 3)
power++;
while(power > 0) {
boolean modified = extendToken(builder, numString, power * 3);
if( modified )
builder.append(getConnectDisplay(Connect.AfterNumber))
.append(getPowerDisplay(Power.values()[power-1]));
power--;
}
extendToken(builder, Long.toString(number), 0);
}
private boolean extendToken(StringBuilder builder,
String number,
int suffix) {
assert builder != null && checkNumber(number) && 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";
else
result = 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);
}
}
/*----------------------------------------------------------------------------
* English with only Clean Space Connectors
---------------------------------------------------------------------------*/
private static class NumberTextEnglishCleanSpaceOnly
extends NumberTextEnglish {
@Override
String getConnectDisplay(Connect connect) {
return connect == Connect.AfterTen ?
" " :
super.getConnectDisplay(connect);
}
}
/*----------------------------------------------------------------------------
* Chinese Implementation
---------------------------------------------------------------------------*/
private static class NumberTextChinese extends NumberText {
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"), // 10^4
Yi ("亿", "億"), // 10^8
Zhao ("兆", "兆"), // 10^12
Jing ("京", "京"), // 10^16 (enough for Long.MAX_VALUE)
Gai ("垓", "垓"), // 10^20
Zi ("秭", "秭"), // 10^24
Rang ("穰", "穰"), // 10^28
Gou ("沟", "溝"), // 10^32
Jian ("涧", "澗"), // 10^36
Zheng ("正", "正"), // 10^40
Zai ("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 position
Yi ("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;
}
@Override
public String getText(long number) {
StringBuilder builder = new StringBuilder();
buildText(builder, number);
return builder.toString();
}
@Override
public String getOrdinalText(long number) {
StringBuilder builder = new StringBuilder().append("Di");
buildText(builder, number);
return builder.toString();
}
private void buildText(StringBuilder builder, long number) {
assert builder != null;
if( number < 0 ) {
builder.append(getConnectDisplay(Connect.Fu));
number = -number;
}
String numString = Long.toString(number);
int power = 0;
while(numString.length() > (power + 1) * 4)
power++;
while(power > 0) {
if( extendToken(builder, numString, power * 4) )
builder.append(getPowerDisplay(Power.values()[power-1]));
power--;
}
extendToken(builder, numString, 0);
}
private boolean extendToken(StringBuilder builder,
String number,
int suffix) {
assert builder != null && checkNumber(number) && 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 zero
if( 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;
}
}
}
