【工具】加密方式

private static String md5(String tmp) {
    String result=null;
    try {
        MessageDigest md = MessageDigest.getInstance("MD5");
        byte[] buf = md.digest(tmp.getBytes());
        if (buf != null && buf.length != 0) {
            StringBuilder out = new StringBuilder();
            for (byte b : buf) {
                out.append(HEX[b >> 4 & 15]).append(HEX[b & 15]);
            }
            result=out.toString();
        }
    } catch (Exception e) {
        e.printStackTrace();
        return null;
    }
    return result;
}

private static String hmacSHA1(String var1, String var2, String charset) {
    String result = null;
    try {
        SecretKeySpec signingKey = new SecretKeySpec(var2.getBytes(charset), "HmacSHA1");
        Mac mac = Mac.getInstance("HmacSHA1");
        mac.init(signingKey);
        byte[] buf = mac.doFinal(var1.getBytes(charset));
        if (buf != null && buf.length != 0) {
            StringBuilder out = new StringBuilder();
            for (byte b : buf) {
                out.append(HEX[b >> 4 & 15]).append(HEX[b & 15]);
            }
            result = out.toString();
        }
    } catch (NoSuchAlgorithmException | InvalidKeyException | UnsupportedEncodingException e) {
        e.printStackTrace();
    }
    return result;
}