16进制转ASCII 16进制转ascii，转字符串

　　

/**
     * 16进制转ASCII
     *
     * @param hex
     * @return
     */
    public static String hex2Str(String hex) {
        StringBuilder sb = new StringBuilder();
        StringBuilder temp = new StringBuilder();
        //49204c6f7665204a617661 split into two characters 49, 20, 4c...
        for (int i = 0; i < hex.length() - 1; i += 2) {
            //grab the hex in pairs
            String output = hex.substring(i, (i + 2));
            //convert hex to decimal
            int decimal = Integer.parseInt(output, 16);
            //convert the decimal to character
            sb.append((char) decimal);
            temp.append(decimal);
        }
        return sb.toString();
    }