/**
     * 判斷字元是否是中文
     *
     * @param c 字元
     * @return 是否是中文
     */
    public static boolean isChinese(char c) {
        Character.UnicodeBlock ub = Character.UnicodeBlock.of(c);
        if (ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS
                || ub == Character.UnicodeBlock.CJK_COMPATIBILITY_IDEOGRAPHS
                || ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS_EXTENSION_A
                || ub == Character.UnicodeBlock.GENERAL_PUNCTUATION
                || ub == Character.UnicodeBlock.CJK_SYMBOLS_AND_PUNCTUATION
                || ub == Character.UnicodeBlock.HALFWIDTH_AND_FULLWIDTH_FORMS) {
            return true;
        }
        return false;
    }

    /**
     * 判斷字串是否是亂碼
     *
     * @param strName 字串
     * @return 是否是亂碼
     */
    public static boolean isMessyCode(String strName) {
        Pattern p = Pattern.compile("\s*|t*|r*|n*");
        Matcher m = p.matcher(strName);
        String after = m.replaceAll("");
        String temp = after.replaceAll("\p{P}", "");
        char[] ch = temp.trim().toCharArray();
        float chLength = ch.length;
        float count = 0;
        for (int i = 0; i < ch.length; i++) {
            char c = ch[i];
            if (!Character.isLetterOrDigit(c)) {
                if (!isChinese(c)) {
                    count = count + 1;
                }
            }
        }
        float result = count / chLength;
        if (result > 0.4) {
            return true;
        } else {
            return false;
        }

    }

    public static void main(String[] args) {
        System.out.println(isMessyCode("韩顺平"));
        System.out.println(isMessyCode("你好"));
    }