code: public static String toCurrency(Locale locale, double number) {
          return NumberFormat.getCurrencyInstance(locale).format(number);
      }
docs: 格式化为货币字符串
  
  @param locale {@link Locale}，比如：{@link Locale#CHINA}
  @param number 数字
  
  @return 货币字符串
  
  @since 1.0.9