Java i18n的简单实现

package com.joshua.code.sample.i18n.bundle;

import java.util.Locale;
import java.util.ResourceBundle;

public class I18NUtils {

	private static final String ENGLISH_LANGUAGE = Locale.ENGLISH.getLanguage();

	private static ResourceBundle RES_BUNDLE;
	public static Locale LOCALE;

	static {
		Locale defLocale = Locale.getDefault();
		if (defLocale.getLanguage().equals(ENGLISH_LANGUAGE)) {
			Locale.setDefault(Locale.ENGLISH);
		}
		RES_BUNDLE = ResourceBundle.getBundle(
				"com.joshua.code.sample.i18n.bundle.resources.messages",
				defLocale);
		}
	}

	public static void setLocale(Locale loc) {
		LOCALE = loc;
		RES_BUNDLE = ResourceBundle.getBundle(
				"com.joshua.code.sample.i18n.bundle.resources.messages", loc);
	}
	
	public static String getResValue(String key) {
		if (key == null) return null;
		String resKey = key.replace(' ', '_');
		resKey = resKey.toLowerCase(java.util.Locale.ENGLISH);
		if (RES_BUNDLE.containsKey(resKey)) {
			return RES_BUNDLE.getString(resKey);
		} else {
			return null;
		}
	}
	
	public static void main(String[] args) {
//		I18NUtils.setLocale(Locale.GERMAN);
//		I18NUtils.setLocale(Locale.FRENCH);
//		I18NUtils.setLocale(Locale.JAPAN);
		I18NUtils.setLocale(Locale.CHINA);
//		I18NUtils.setLocale(Locale.TAIWAN);
		System.out.println(I18NUtils.getResValue("add"));
	}
	
}

 

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