/**  * 判斷字符是否是中文  *  * @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; } /**  * 判斷字符串是否是亂碼  *  * @param strName 字符串  * @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")); }