Java判斷中文字串是否亂碼

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轉自CSDN一個博主的文章，感覺很有用，轉寄收藏一下。

import java.util.regex.Matcher;import java.util.regex.Pattern;public class ChineseUtill {private 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;}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 = 0 ;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;}chLength++; }}float result = count / chLength ;if (result > 0.4) {return true;} else {return false;}}public static String toChinese(String msg){if(isMessyCode(msg)){try {return new String(msg.getBytes("ISO8859-1"), "UTF-8");} catch (Exception e) {}}return msg ; }}

Java判斷中文字串是否亂碼