String stringToSign = timestamp+"\n"+suiteTicket
Mac mac = Mac.getInstance("HmacSHA256");
mac.init(new SecretKeySpec(suiteSecret.getBytes("UTF-8"), "HmacSHA256"));
byte[] signData = mac.doFinal(stringToSign.getBytes("UTF-8"));
return new String(Base64.encodeBase64(signData));

// encoding参数使用utf-8
public static String urlEncode(String value, String encoding) {if (value == null) {return "";}try {String encoded = URLEncoder.encode(value, encoding);return encoded.replace("+", "%20").replace("*", "%2A").replace("~", "%7E").replace("/", "%2F");} catch (UnsupportedEncodingException e) {throw new IllegalArgumentException("FailedToEncodeUri", e);}
}

DefaultDingTalkClient client = new DefaultDingTalkClient("https://oapi.dingtalk.com/service/get_corp_token");
OapiServiceGetCorpTokenRequest req = new OapiServiceGetCorpTokenRequest();
req.setAuthCorpid("dingc365fcabbf733c3535c2f4657eb6378f");
OapiServiceGetCorpTokenResponse execute = client.execute(req,"suiteKey","suiteSecret", "suiteTicket");

DingTalkClient client = new DefaultDingTalkClient("https://oapi.dingtalk.com/user/getuserinfo");
OapiUserGetuserinfoRequest request = new OapiUserGetuserinfoRequest();
request.setCode("BzmP5AL3tYoZ8f3aKJP");
request.setHttpMethod("GET");
OapiUserGetuserinfoResponse response = client.execute(request,accessToken);

DingTalkClient client = new DefaultDingTalkClient("https://oapi.dingtalk.com/user/get");
OapiUserGetRequest request = new OapiUserGetRequest();
request.setUserid("zhangsan");
request.setHttpMethod("GET");
OapiUserGetResponse response = client.execute(request, accessToken);