修改jFinal的I18N类为instance方式使用

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public class I18N
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{
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   private String baseName;
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   private Locale defaultLocale = Locale.getDefault();
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   private int i18nMaxAgeOfCookie = Const.DEFAULT_I18N_MAX_AGE_OF_COOKIE;
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   private static final NullResourceBundle NULL_RESOURCE_BUNDLE = new NullResourceBundle();
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   private static final ConcurrentMap<String, ResourceBundle> bundlesMap = new ConcurrentHashMap<String, ResourceBundle>();
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   private I18N() {
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   }
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   public static I18N getInstance(String baseName, Locale defaultLocale, Integer i18nMaxAgeOfCookie) {
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      I18N me = new I18N();
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      me.baseName = baseName;
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      me.defaultLocale = defaultLocale;
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      if (i18nMaxAgeOfCookie != null)
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         me.i18nMaxAgeOfCookie = i18nMaxAgeOfCookie;
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       return me;
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   }
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   public Locale getDefaultLocale() {
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       return defaultLocale;
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   }
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   final public int getI18nMaxAgeOfCookie() {
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       return i18nMaxAgeOfCookie;
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   }
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   private ResourceBundle getResourceBundle(Locale locale) {
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       String resourceBundleKey = getresourceBundleKey(locale);
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       ResourceBundle resourceBundle = bundlesMap.get(resourceBundleKey);
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       if (resourceBundle == null) {
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           try {
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               resourceBundle = ResourceBundle.getBundle(baseName, locale);
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               bundlesMap.put(resourceBundleKey, resourceBundle);
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           }
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           catch (MissingResourceException e) {
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               resourceBundle = NULL_RESOURCE_BUNDLE;
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           }
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       }
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       return resourceBundle;
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   }
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   private String getresourceBundleKey(Locale locale) {
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       return baseName +  locale.toString();
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   }
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   public String getText(String key) {
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       return getResourceBundle(defaultLocale).getString(key);
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   }
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   public String getText(String key, String defaultValue) {
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       String result = getResourceBundle(defaultLocale).getString(key);
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       return result != null ? result : defaultValue;
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   }
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   public String getText(String key, Locale locale) {
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       return getResourceBundle(locale).getString(key);
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   }
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   public String getText(String key, String defaultValue, Locale locale) {
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       String result = getResourceBundle(locale).getString(key);
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       return result != null ? result : defaultValue;
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   }
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   public Locale localeFromString(String localeStr) {
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       if ((localeStr == null) || (localeStr.trim().length() == 0) || ("_".equals(localeStr))) {
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           return defaultLocale;
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       }
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       int index = localeStr.indexOf('_');
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       if (index < 0) {
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           return new Locale(localeStr);
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       }
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       String language = localeStr.substring(0, index);
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       if (index == localeStr.length()) {
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           return new Locale(language);
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       }
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       localeStr = localeStr.substring(index + 1);
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       index = localeStr.indexOf('_');
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       if (index < 0) {
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           return new Locale(language, localeStr);
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       }
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       String country = localeStr.substring(0, index);
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       if (index == localeStr.length()) {
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           return new Locale(language, country);
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       }
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       localeStr = localeStr.substring(index + 1);
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       return new Locale(language, country, localeStr);
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   }
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   private static class NullResourceBundle extends ResourceBundle {
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       public Enumeration<String> getKeys() {
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           return null; // dummy  www.zzzyk.com
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       }
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       protected Object handleGetObject(String key) {
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           return null; // dummy
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       }
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   }
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}

作者：Alex.yang

补充：综合编程 , 其他综合 ,