校驗中文是否亂碼

public class ChineseTest {

    @Test
    public void testChinese() {
        String str = "dfgfdg四川省文化和旅遊廳aaaf";//false
//        str = "dfgfdg�Ĵ�ʡ֪ʶ��Ȩ����ٽ�����廳aaaf";//true
        boolean result = isMessyCode(str);
        System.out.println(result);
    }

   /**
     * 是否有亂碼
     * @param strName 字符串
     * @return true 亂碼
     */
    private 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;
        }
    }
    


    // 根據Unicode編碼完美的判斷中文漢字和符號
    private 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.CJK_UNIFIED_IDEOGRAPHS_EXTENSION_B
                || ub == Character.UnicodeBlock.CJK_SYMBOLS_AND_PUNCTUATION
                || ub == Character.UnicodeBlock.HALFWIDTH_AND_FULLWIDTH_FORMS
                || ub == Character.UnicodeBlock.GENERAL_PUNCTUATION) {
            return true;
        }
        return false;
    }
}