字符串与16进制字符串相互转化

一、ASCII字符串转换为16进制字符串

    /**
     * @param s 字符串
     * @return 16进制字符串
     * @desc 字符串转换为16进制字符串
     */
    public static String toHexString(String s)
    {
        String str = "";
        for (int i = 0; i < s.length(); i++)
        {
            int ch = (int) s.charAt(i);
            String s4 = Integer.toHexString(ch);
            str = str + s4;
        }
        return "0x" + str;//0x表示十六进制
    }

二、十六进制编码转换为ASCII字符串

    /**
     * @param s  
     * @return 字符串
     * @desc 转换十六进制编码为字符串
     */
    public static String toStringHex(String s)
    {
        if ("0x".equals(s.substring(0, 2)))
        {
            s = s.substring(2);
        }
        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;
    }