code: public static void init(Locale locale) {
          if (locale != null) {
              Locale.setDefault(locale);
          }
          if (baseNameList == null || baseNameList.size() == 0) {
              initBaseNameList();
          }
          resourceBundles = new ResourceBundle[baseNameList.size()];
          int i = 0;
          for (String baseName : baseNameList) {
              resourceBundles[i] = ResourceBundle.getBundle(baseName);
              i++;
          }
      }
docs: 初始化 - 可以设置语言
  
  @param locale