问题
Does anyone know of a freely available java 1.5 package that provides a list of ISO 3166-1 country codes as a enum or EnumMap? Specifically I need the "ISO 3166-1-alpha-2 code elements", i.e. the 2 character country code like "us", "uk", "de", etc. Creating one is simple enough (although tedious), but if there's a standard one already out there in apache land or the like it would save a little time.
回答1:
Now an implementation of country code (ISO 3166-1 alpha-2/alpha-3/numeric) list as Java enum is available at GitHub under Apache License version 2.0.
Example:
CountryCode cc = CountryCode.getByCode("JP");
System.out.println("Country name = " + cc.getName()); // "Japan"
System.out.println("ISO 3166-1 alpha-2 code = " + cc.getAlpha2()); // "JP"
System.out.println("ISO 3166-1 alpha-3 code = " + cc.getAlpha3()); // "JPN"
System.out.println("ISO 3166-1 numeric code = " + cc.getNumeric()); // 392
Last Edit 2016-Jun-09
CountryCode enum was packaged into com.neovisionaries.i18n with other Java enums, LanguageCode (ISO 639-1), LanguageAlpha3Code (ISO 639-2), LocaleCode, ScriptCode (ISO 15924) and CurrencyCode (ISO 4217) and registered into the Maven Central Repository.
Maven
<dependency>
<groupId>com.neovisionaries</groupId>
<artifactId>nv-i18n</artifactId>
<version>1.22</version>
</dependency>
Gradle
dependencies {
compile 'com.neovisionaries:nv-i18n:1.22'
}
GitHub
https://github.com/TakahikoKawasaki/nv-i18n
Javadoc
http://takahikokawasaki.github.com/nv-i18n/
OSGi
Bundle-SymbolicName: com.neovisionaries.i18n
Export-Package: com.neovisionaries.i18n;version="1.22.0"
回答2:
This code gets 242 countries in Sun Java 6:
String[] countryCodes = Locale.getISOCountries();
Though the ISO website claims there are 249 ISO 3166-1-alpha-2 code elements, though the javadoc links to the same information.
回答3:
Here's how I generated an enum with country code + country name:
package countryenum;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Locale;
public class CountryEnumGenerator {
public static void main(String[] args) {
String[] countryCodes = Locale.getISOCountries();
List<Country> list = new ArrayList<Country>(countryCodes.length);
for (String cc : countryCodes) {
list.add(new Country(cc.toUpperCase(), new Locale("", cc).getDisplayCountry()));
}
Collections.sort(list);
for (Country c : list) {
System.out.println("/**" + c.getName() + "*/");
System.out.println(c.getCode() + "(\"" + c.getName() + "\"),");
}
}
}
class Country implements Comparable<Country> {
private String code;
private String name;
public Country(String code, String name) {
super();
this.code = code;
this.name = name;
}
public String getCode() {
return code;
}
public void setCode(String code) {
this.code = code;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
@Override
public int compareTo(Country o) {
return this.name.compareTo(o.name);
}
}
回答4:
If you are already going to rely on Java locale, then I suggest using a simple HashMap instead of creating new classes for countries etc.
Here's how I would use it if I were to rely on the Java Localization only:
private HashMap<String, String> countries = new HashMap<String, String>();
String[] countryCodes = Locale.getISOCountries();
for (String cc : countryCodes) {
// country name , country code map
countries.put(new Locale("", cc).getDisplayCountry(), cc.toUpperCase());
}
After you fill the map, you can get the ISO code from the country name whenever you need it. Or you can make it a ISO code to Country name map as well, just modify the 'put' method accordingly.
回答5:
There is an easy way to generate this enum with the language name. Execute this code to generate the list of enum fields to paste :
/**
* This is the code used to generate the enum content
*/
public static void main(String[] args) {
String[] codes = java.util.Locale.getISOLanguages();
for (String isoCode: codes) {
Locale locale = new Locale(isoCode);
System.out.println(isoCode.toUpperCase() + "(\"" + locale.getDisplayLanguage(locale) + "\"),");
}
}
回答6:
Not a java enum, but a JSON version of this is available at http://country.io/names.json
回答7:
If anyone is already using the Amazon AWS SDK it includes com.amazonaws.services.route53domains.model.CountryCode. I know this is not ideal but it's an alternative if you already use the AWS SDK. For most cases I would use Takahiko's nv-i18n since, as he mentions, it implements ISO 3166-1.
回答8:
This still does not answer the question. I was also looking for a kind of enumerator for this, and did not find anything. Some examples using hashtable here, but represent the same as the built-in get
I would go for a different approach. So I created a script in python to automatically generate the list in Java:
#!/usr/bin/python
f = open("data.txt", 'r')
data = []
cc = {}
for l in f:
t = l.split('\t')
cc = { 'code': str(t[0]).strip(),
'name': str(t[1]).strip()
}
data.append(cc)
f.close()
for c in data:
print """
/**
* Defines the <a href="http://en.wikipedia.org/wiki/ISO_3166-1_alpha-2">ISO_3166-1_alpha-2</a>
* for <b><i>%(name)s</i></b>.
* <p>
* This constant holds the value of <b>{@value}</b>.
*
* @since 1.0
*
*/
public static final String %(code)s = \"%(code)s\";""" % c
where the data.txt file is a simple copy&paste from Wikipedia table (just remove all extra lines, making sure you have a country code and country name per line).
Then just place this into your static class:
/**
* Holds <a href="http://en.wikipedia.org/wiki/ISO_3166-1_alpha-2">ISO_3166-1_alpha-2</a>
* constant values for all countries.
*
* @since 1.0
*
* </p>
*/
public class CountryCode {
/**
* Constructor defined as <code>private</code> purposefully to ensure this
* class is only used to access its static properties and/or methods.
*/
private CountryCode() { }
/**
* Defines the <a href="http://en.wikipedia.org/wiki/ISO_3166-1_alpha-2">ISO_3166-1_alpha-2</a>
* for <b><i>Andorra</i></b>.
* <p>
* This constant holds the value of <b>{@value}</b>.
*
* @since 1.0
*
*/
public static final String AD = "AD";
//
// and the list goes on! ...
//
}
回答9:
I didn't know about this question till I had just recently open-sourced my Java enum for exactly this purpose! Amazing coincidence!
I put the whole source code on my blog with BSD caluse 3 license so I don't think anyone would have any beefs about it.
Can be found here. https://subversivebytes.wordpress.com/2013/10/07/java-iso-3166-java-enum/
Hope it is useful and eases development pains.
回答10:
I have created an enum, which you address by the english country name. See country-util.
On each enum you can call getLocale() to get the Java Locale.
From the Locale you can get all the information you are used to, fx the ISO-3166-1 two letter country code.
public enum Country{
ANDORRA(new Locale("AD")),
AFGHANISTAN(new Locale("AF")),
ANTIGUA_AND_BARBUDA(new Locale("AG")),
ANGUILLA(new Locale("AI")),
//etc
ZAMBIA(new Locale("ZM")),
ZIMBABWE(new Locale("ZW"));
private Locale locale;
private Country(Locale locale){
this.locale = locale;
}
public Locale getLocale(){
return locale;
}
Pro:
- Light weight
- Maps to Java Locales
- Addressable by full country name
- Enum values are not hardcoded, but generated by a call to Locale.getISOCountries(). That is: Simply recompile the project against the newest java version to get any changes made to the list of countries reflected in the enum.
Con:
- Not in Maven repository
- Most likely simpler / less expressive than the other solutions, which I don't know.
- Created for my own needs / not as such maintained. - You should probably clone the repo.
来源：https://stackoverflow.com/questions/139867/is-there-an-open-source-java-enum-of-iso-3166-1-country-codes