byte与hexString互转33转3,3转33

/**
     * 16进制的字符串转化为utf-8格式的字符串   33转3
     * @param s
     * @return
     */
    public static String toStringHex(String s) {
        byte[] baKeyword = new byte[s.length() / 2];
        for (int i = 0; i < baKeyword.length; i++) {
        try {
        baKeyword[i] = (byte) (0xff & Integer.parseInt(s.substring(
        i * 2, i * 2 + 2), 16));
        } catch (Exception e) {
        e.printStackTrace();
        }
        }
        try {
        s = new String(baKeyword, "utf-8");// UTF-16le:Not
        } catch (Exception e1) {
        e1.printStackTrace();
        }
        return s;
    }
    
    /**
     * 3转33
     * @param src
     * @return
     */
    public static String bytesToHexString(byte[] src){  
        StringBuilder stringBuilder = new StringBuilder("");  
        if (src == null || src.length <= 0) {  
            return null;  
        }  
        for (int i = 0; i < src.length; i++) {  
            int v = src[i] & 0xFF;  
            String hv = Integer.toHexString(v);  
            if (hv.length() < 2) {  
                stringBuilder.append(0);  
            }  
            stringBuilder.append(hv);  
        }  
        return stringBuilder.toString();  
    }