post和get方法工具类：HttpUtils

package weaver.dingtalk.utils;

import com.alibaba.fastjson.JSONObject;

import org.apache.http.HttpEntity;

import org.apache.http.HttpResponse;

import org.apache.http.HttpStatus;

import org.apache.http.NameValuePair;

import org.apache.http.client.HttpClient;

import org.apache.http.client.methods.HttpGet;

import org.apache.http.client.methods.HttpPost;

import org.apache.http.entity.StringEntity;

import org.apache.http.impl.client.DefaultHttpClient;

import org.apache.http.util.EntityUtils;

import weaver.interfaces.email.SSLClient;

import java.util.ArrayList;

import java.util.List;

/**

 * http请求工具类

 * @author lcs

 */

public class HttpUtils {

    public static String doPost(String url, JSONObject jsonObject, String charset){

        HttpClient httpClient = null;

        HttpPost httpPost = null;

        String result = null;

        try{

            httpClient = new SSLClient();

            httpPost = new HttpPost(url);

            //设置参数

            List<NameValuePair> list = new ArrayList<NameValuePair>();

            StringEntity entity = new StringEntity(jsonObject.toString(),charset);

            entity.setContentEncoding("UTF-8");

            entity.setContentType("application/json");

            httpPost.setEntity(entity);

            HttpResponse response = httpClient.execute(httpPost);

            if(response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {

                HttpEntity resEntity = response.getEntity();

                if(resEntity != null){

                    result = EntityUtils.toString(resEntity,charset);

                }

            }

        }catch(Exception ex){

            ex.printStackTrace();

        }

        return result;

    }

    public static String doGet(String url){

        String result = null;

        HttpGet request = new HttpGet(url);

        HttpClient httpClient = new DefaultHttpClient();

        try {

            HttpResponse response = httpClient.execute(request);

            if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {

                result= EntityUtils.toString(response.getEntity(),"utf-8");

            }

        }catch (Exception e){

            e.printStackTrace();

        }

        return result;

    }

}

钉钉接口方法：DingTalkService

package weaver.dingtalk.service;

import com.alibaba.fastjson.JSON;

import com.alibaba.fastjson.JSONArray;

import com.alibaba.fastjson.JSONObject;

import weaver.dingtalk.utils.HttpUtils;

import java.util.HashMap;

import java.util.Map;

/**

 * DingTalk相关方法

 * @author 刘春生

 */

public class DingTalkService {

    /**

     * 获取钉钉的accessToken

     * @param url

     * @param corpid

     * @param secret

     * @return

     */

    public static String getAccessToken(String url,String corpid,String secret){

        String requestUrl = url + "?corpid="+corpid+"&corpsecret="+secret;

        String result = HttpUtils.doGet(requestUrl);

        String accessToken = null;

        JSONObject jsonObject = new JSONObject();

        jsonObject = JSON.parseObject(result);

        String msg = (String)jsonObject.get("errmsg");

        if("ok".equals(msg)){

            accessToken = (String)jsonObject.get("access_token");

        }

        return accessToken;

    }

    public static JSONArray getCardList(String accessToken, String workDateFrom, String workDateTo, String offset, String limit){

        String recordUrl = "https://oapi.dingtalk.com/attendance/list?access_token="+accessToken;

        JSONObject jsonObject = new JSONObject();

        jsonObject.put("workDateFrom",workDateFrom);

        jsonObject.put("workDateTo",workDateTo);

        jsonObject.put("offset",offset);

        jsonObject.put("limit",limit);

        String result = HttpUtils.doPost(recordUrl,jsonObject,"utf-8");

        JSONObject resutJSON = JSONObject.parseObject(result);

        String msg = (String)resutJSON.get("errmsg");

        JSONArray jsonArray = null;

        if("ok".equals(msg)){

            jsonArray = (JSONArray) resutJSON.get("recordresult");

        }

        return jsonArray;

    }

}

测试方法：TestDingTalk

package weaver.dingtalk.service;

import com.alibaba.fastjson.JSONArray;

public class TestDingTalk {

    public static void main(String[] args) {

        String workDateFrom = "2017-11-03 08:00:00";

        String workDateTo = "2017-11-03 18:00:00";

        String offset = "0";//分页获取数据，0表示第一页

        String limit = "10";//每页10条数据

        String accessTokenUrl = "https://oapi.dingtalk.com/gettoken";

        String corpid = "##############";//替换成自己的corpid

        String secret = "##############";//替换成自己的corpsecret

        String accessToken = DingTalkService.getAccessToken(accessTokenUrl,corpid,secret);

        if(accessToken!=null){

            JSONArray jsonArray = DingTalkService.getCardList(accessToken,workDateFrom,workDateTo,offset,limit);

            System.out.println(jsonArray);

        }

    }

}