/**     * 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;    }    public static String enANum = "^[\\^\\w+-=*/%&$#@<>(){}\\[\\],.:;\"\'\\\\]*$";    public static Pattern enANumPat = Pattern.compile(enANum);    public static String [] encode = {"GB2312","GBK","ISO-8859-1","UTF-8"};        public static boolean isEnglishAndNumber(String str) {        Matcher matcher = null;        String temp[] = str.split("");        for (String s : temp) {            matcher = enANumPat.matcher(s);            if(!matcher.find()){                return false;            }        }        return true;    }    public static String getUnEncode(String str) throws Exception {        String newStr = null;        if (!isEnglishAndNumber(str)) {            for (int i = 0; i < encode.length; i++) {                for (int j = 0; j < encode.length; j++) {                    newStr = new String(str.getBytes(encode[i]), encode[j]);                    char temp[] = newStr.toCharArray();                    boolean isAll = true;                    for (char c : temp) {                        if (!isEnglishAndNumber(String.valueOf(c)) && !isChinese(c)) {                            isAll = false;                            break;                        }                    }                    if (isAll) {                        return newStr;                    }                }            }        }        return str;    }