Java判断字符串是否是乱码

/** * 判断字符是否是中文 * * @param c 字符 * @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;} /** * 判断字符串是否是乱码 * * @param strName 字符串 * @return 是否是乱码 */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"));}