Pattern pattern=Pattern.compile("[零一二三四五六七八九十百千万亿]+|[零壹贰叁肆伍陆柒捌玖拾佰仟万亿]+|[\\d]+");

        Matcher matcher=pattern.matcher("一千八百四十二");
        System.out.println(matcher.matches());

        matcher=pattern.matcher("壹仟贰佰");
        System.out.println(matcher.matches());

        matcher=pattern.matcher("15687");
        System.out.println(matcher.matches());

        matcher=pattern.matcher("一23");
        System.out.println(matcher.matches());

        matcher=pattern.matcher("四万万五千");
        System.out.println(matcher.matches());