java钉钉通讯录同步

钉钉做了好好几个项目了，和阿里云还有阿里钉钉合作也挺不错。因为之前就做过微信公众号，接触钉钉感觉还是比较顺手的，虽然也有一些不一样的地方。

因为之前写了一个微信公众号的开发文档，一直想写一个钉钉的开发文档，一直没有时间，先写个钉钉通讯录同步的吧~~

废话不多说，先上菜吧~~

1.ORACLE官方网站下载JCE无限制权限策略文件：因为钉钉的通讯录同步是通过回调来实现的，而回调信息是加密过的需要解密，先要替换jdk/jre里security文件夹内的两个jar包：local_policy.jar和US_export_policy.jar

我用的是jdk8，其他版本请对应下载

替换方式：

（此文件夹的local_policy.jar和US_export_policy.jar是JDK8的，若是其他版本的请按照下放地址下载）
异常java.security.InvalidKeyException:illegal Key Size和『计算解密文字错误』的解决方案：

在官方网站下载JCE无限制权限策略文件
JDK6的下载地址：http://www.oracle.com/technetwork/java/javase/downloads/jce-6-download-429243.html

JDK7的下载地址：http://www.oracle.com/technetwork/java/javase/downloads/jce-7-download-432124.html

JDK8的下载地址：http://www.oracle.com/technetwork/java/javase/downloads/jce8-download-2133166.html

下载后解压，可以看到local_policy.jar和US_export_policy.jar以及readme.txt。
如果安装的是JRE，将两个jar文件放到%JRE_HOME% \lib\security目录下覆盖原来的文件，
如果安装的是JDK，将两个jar文件放到%JDK_HOME%\jre\lib\security目录下覆盖原来文件。

2.通讯录回调：

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import javax.servlet.ServletInputStream;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.taobao.api.ApiException;
import com.alibaba.fastjson.JSONObject;

/**
 * <p>通讯录事件回调<p>
 * @version 1.0
 * @author li_hao
 * @date 2017年12月21日
 */
@WebServlet("/callbackreceive")
public class CallBackServlet extends HttpServlet {

    private static final long serialVersionUID = -1785796919047156450L;

    public CallBackServlet() {
        super();
    }

    protected void doPost(HttpServletRequest request, HttpServletResponse response) {
        doGet(request, response);
    }

    /*
     * 接收钉钉服务器的回调数据
     *
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response){
        try {
            /** url中的签名 **/
            String msgSignature = request.getParameter("signature");
            /** url中的时间戳 **/
            String timeStamp = request.getParameter("timestamp");
            /** url中的随机字符串 **/
            String nonce = request.getParameter("nonce");
            /** 取得JSON对象中的encrypt字段     **/
            String encrypt = "";

            /** 获取post数据包数据中的加密数据 **/
            ServletInputStream sis = request.getInputStream();
            BufferedReader br = new BufferedReader(new InputStreamReader(sis));
            String line = null;
            StringBuilder sb = new StringBuilder();
            while ((line = br.readLine()) != null) {
                sb.append(line);
            }
            JSONObject jsonEncrypt = JSONObject.parseObject(sb.toString());
            encrypt = jsonEncrypt.getString("encrypt");

            String decodeEncrypt = decodeEncrypt(msgSignature, timeStamp, nonce, encrypt); //密文解密
            JSONObject decodeEncryptJson = JSONObject.parseObject(decodeEncrypt);

            String eventType = decodeEncryptJson.getString("EventType");  //回调类型
            String UserIds = decodeEncryptJson.getString("UserId");  //用户发生变更的userid列表
            String DeptIds = decodeEncryptJson.getString("DeptId");  //部门发生变更的deptId列表
            String res = "success";  //res是需要返回给钉钉服务器的字符串，一般为success;"check_create_suite_url"和"check_update_suite_url"事件为random字段;(具体请查看文档或者对应eventType的处理步骤)

            JSONObject jsonObjectData = new JSONObject();
            //根据不同的回调类型，进行相应的操作
            switch (eventType) {
            case AddressListRegister.USER_ADD_ORG :
                //通讯录用户增加

                break;
            case AddressListRegister.USER_MODIFY_ORG :
                //通讯录用户更改

                break;
            case AddressListRegister.USER_LEAVE_ORG :
                //通讯录用户离职

                break;
            case AddressListRegister.ORG_ADMIN_ADD :
                //通讯录用户被设为管理员

                break;
            case AddressListRegister.ORG_ADMIN_REMOVE :
                //通讯录用户被取消设置管理员

                break;
            case AddressListRegister.ORG_DEPT_CREATE :
                //通讯录企业部门创建

                break;
            case AddressListRegister.ORG_DEPT_MODIFY :
                //通讯录企业部门修改

                break;
            case AddressListRegister.ORG_DEPT_REMOVE :
                //通讯录企业部门删除

                break;
            case AddressListRegister.ORG_REMOVE :
                //企业被解散

                break;
            case AddressListRegister.ORG_CHANGE :
                //企业信息发生变更

                break;
            case AddressListRegister.LABEL_USER_CHANGE :
                //员工角色信息发生变更

                break;
            case AddressListRegister.LABEL_CONF_ADD :
                //增加角色或者角色组

                break;
            case AddressListRegister.LABEL_CONF_DEL :
                //删除角色或者角色组

                break;
            case AddressListRegister.LABEL_CONF_MODIFY :
                //修改角色或者角色组

                break;
            case AddressListRegister.CHECK_URL :
                //测试回调接口事件类型

                System.out.println("测试回调接口！");
                break;
            default: // do something
                break;
            }
            response.getWriter().append(codeEncrypt(res, timeStamp, nonce).toString()); //返回加密后的数据
        } catch (Exception e) {
            e.printStackTrace();
        }

    }

    /**
     * 创建加密/解密 类
     * @return
     */
    public DingTalkEncryptor createDingTalkEncryptor(){
        DingTalkEncryptor dingTalkEncryptor = null;  //加密方法类
        try {
            dingTalkEncryptor = new DingTalkEncryptor(AddressListRegister.TOKEN, AddressListRegister.AES_KEY,AddressListRegister.CORPID);  //创建加解密类
        } catch (DingTalkEncryptException e) {
            e.printStackTrace();
        }
        return dingTalkEncryptor;
    }

    /**
     * encrypt解密
     * @param msgSignature
     * @param timeStamp
     * @param nonce
     * @param encrypt  密文
     * @return decodeEncrypt 解密后的明文
     */
    public String decodeEncrypt(String msgSignature,String timeStamp,String nonce,String encrypt){
            String decodeEncrypt = null;
            try {
                decodeEncrypt = createDingTalkEncryptor().getDecryptMsg(msgSignature, timeStamp, nonce, encrypt); //encrypt解密
            } catch (DingTalkEncryptException e) {
                e.printStackTrace();
            }
        return decodeEncrypt;
    }

    /**
     *  对返回信息进行加密
     * @param res
     * @param timeStamp
     * @param nonce
     * @return
     */
    public JSONObject codeEncrypt(String res,String timeStamp,String nonce){
        long timeStampLong = Long.parseLong(timeStamp);
        Map<String, String> jsonMap = null;
        try {
            jsonMap = createDingTalkEncryptor().getEncryptedMap(res, timeStampLong, nonce); //jsonMap是需要返回给钉钉服务器的加密数据包
        } catch (DingTalkEncryptException e) {
            System.out.println(e.getMessage());
            e.printStackTrace();
        }
        JSONObject json = new JSONObject();
        json.putAll(jsonMap);
        return json;
    }

    //测试方法
    public static void main(String[] args) throws ApiException {
        String accesstoken = "xxxxxxxxxxxxxxxxxxxxxxxxx";
        String token = AddressListRegister.TOKEN;
        String aesKey = AddressListRegister.AES_KEY;
        String callBackUrl = "http://xxxx/callbackreceive";

        List<String> listStr = new ArrayList<String>();
        listStr.add("user_add_org");
        listStr.add("user_modify_org");
        listStr.add("user_leave_org");

        listStr.add("org_dept_create");
        listStr.add("org_dept_modify");
        listStr.add("org_dept_remove");

        JSONObject registerCallBack = DingTalkUtil.updateCallBack(accesstoken, listStr, token, aesKey, callBackUrl);
        System.out.println("注册事件返回："+registerCallBack);

        JSONObject callBack = DingTalkUtil.getCallBack(accesstoken);
        System.out.println("查询注册事件："+callBack);

    }

}

几个参数和通讯录注册 需要监听的事件类型：

/**
 * <p>几个参数和通讯录注册 需要监听的事件类型<p>
 * @version 1.0
 * @author li_hao
 * @date 2017年12月15日
 */
public class AddressListRegister{

    /**企业的corpid */
    public static final String CORPID = "xxxxxxxxxx";
    /**钉钉开放平台上，开发者设置的token */
    public static final String TOKEN = "token";
    /**数据加密密钥。用于回调数据的加密，长度固定为43个字符，从a-z, A-Z, 0-9共62个字符中选取,您可以随机生成，ISV(服务提供商)推荐使用注册套件时填写的EncodingAESKey */
    public static final String AES_KEY = "xxxxx7p5qnb6zs3xxxxxlkfmxqfkv23d40yd0xxxxxx";

    /**通讯录用户增加 */
    public static final String USER_ADD_ORG = "user_add_org";
    /**通讯录用户更改*/
    public static final String USER_MODIFY_ORG = "user_modify_org";
    /** 通讯录用户离职 */
    public static final String USER_LEAVE_ORG = "user_leave_org";
    /** 通讯录用户被设为管理员 */
    public static final String ORG_ADMIN_ADD = "org_admin_add";
    /** 通讯录用户被取消设置管理员 */
    public static final String ORG_ADMIN_REMOVE = "org_admin_remove";
    /**通讯录企业部门创建*/
    public static final String ORG_DEPT_CREATE = "org_dept_create";
    /** 通讯录企业部门修改 */
    public static final String ORG_DEPT_MODIFY = "org_dept_modify";
    /**通讯录企业部门删除*/
    public static final String ORG_DEPT_REMOVE = "org_dept_remove";
    /**企业被解散*/
    public static final String ORG_REMOVE = "org_remove";
    /**企业信息发生变更*/
    public static final String ORG_CHANGE = "org_change";
    /**员工角色信息发生变更*/
    public static final String LABEL_USER_CHANGE = "label_user_change";
    /**增加角色或者角色组*/
    public static final String LABEL_CONF_ADD = "label_conf_add";
    /**删除角色或者角色组*/
    public static final String LABEL_CONF_DEL = "label_conf_del";
    /**修改角色或者角色组*/
    public static final String LABEL_CONF_MODIFY = "label_conf_modify";
    /**测试回调接口事件类型*/
    public static final String CHECK_URL = "check_url";
}

加解密方法：

import java.io.ByteArrayOutputStream;
import java.nio.charset.Charset;
import java.security.MessageDigest;
import java.util.*;

import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;

import org.apache.commons.codec.binary.Base64;

/**
 * 加解密方法
 * 在ORACLE官方网站下载JCE无限制权限策略文件
 *     JDK6的下载地址：http://www.oracle.com/technetwork/java/javase/downloads/jce-6-download-429243.html
 *     JDK7的下载地址： http://www.oracle.com/technetwork/java/javase/downloads/jce-7-download-432124.html
 */
public class DingTalkEncryptor {

    private static final Charset CHARSET = Charset.forName("utf-8");
    private static final Base64         base64  = new Base64();
    private byte[]         aesKey;
    private String         token;
    private String         corpId;
    /**ask getPaddingBytes key固定长度**/
    private static final Integer AES_ENCODE_KEY_LENGTH = 43;
    /**加密随机字符串字节长度**/
    private static final Integer RANDOM_LENGTH = 16;

    /**
     * 构造函数
     * @param token             钉钉开放平台上，开发者设置的token
     * @param encodingAesKey  钉钉开放台上，开发者设置的EncodingAESKey
     * @param corpId           ISV进行配置的时候应该传对应套件的SUITE_KEY(第一次创建时传的是默认的CREATE_SUITE_KEY)，普通企业是Corpid
     * @throws DingTalkEncryptException 执行失败，请查看该异常的错误码和具体的错误信息
     */
    public DingTalkEncryptor(String token, String encodingAesKey, String corpId) throws DingTalkEncryptException{
        if (null==encodingAesKey ||  encodingAesKey.length() != AES_ENCODE_KEY_LENGTH) {
            throw new DingTalkEncryptException(DingTalkEncryptException.AES_KEY_ILLEGAL);
        }
        this.token = token;
        this.corpId = corpId;
        aesKey = Base64.decodeBase64(encodingAesKey + "=");
    }

    /**
     * 将和钉钉开放平台同步的消息体加密,返回加密Map
     * @param plaintext     传递的消息体明文
     * @param timeStamp      时间戳
     * @param nonce           随机字符串
     * @return
     * @throws DingTalkEncryptException
     */
    public Map<String,String> getEncryptedMap(String plaintext, Long timeStamp, String nonce) throws DingTalkEncryptException {
        if(null==plaintext){
            throw new DingTalkEncryptException(DingTalkEncryptException.ENCRYPTION_PLAINTEXT_ILLEGAL);
        }
        if(null==timeStamp){
            throw new DingTalkEncryptException(DingTalkEncryptException.ENCRYPTION_TIMESTAMP_ILLEGAL);
        }
        if(null==nonce){
            throw new DingTalkEncryptException(DingTalkEncryptException.ENCRYPTION_NONCE_ILLEGAL);
        }
        // 加密
        String encrypt = encrypt(Utils.getRandomStr(RANDOM_LENGTH), plaintext);
        String signature = getSignature(token, String.valueOf(timeStamp), nonce, encrypt);
        Map<String,String> resultMap = new HashMap<String, String>();
        resultMap.put("msg_signature", signature);
        resultMap.put("encrypt", encrypt);
        resultMap.put("timeStamp", String.valueOf(timeStamp));
        resultMap.put("nonce", nonce);
        return  resultMap;
    }

    /**
     * 密文解密
     * @param msgSignature     签名串
     * @param timeStamp        时间戳
     * @param nonce             随机串
     * @param encryptMsg       密文
     * @return                  解密后的原文
     * @throws DingTalkEncryptException
     */
    public String getDecryptMsg(String msgSignature, String timeStamp, String nonce, String encryptMsg)throws DingTalkEncryptException {
        //校验签名
        String signature = getSignature(token, timeStamp, nonce, encryptMsg);
        if (!signature.equals(msgSignature)) {
            throw new DingTalkEncryptException(DingTalkEncryptException.COMPUTE_SIGNATURE_ERROR);
        }
        // 解密
        String result = decrypt(encryptMsg);
        return result;
    }

    /*
     * 对明文加密.
     * @param text 需要加密的明文
     * @return 加密后base64编码的字符串
     */
    private String encrypt(String random, String plaintext) throws DingTalkEncryptException {
        try {
            byte[] randomBytes = random.getBytes(CHARSET);
            byte[] plainTextBytes = plaintext.getBytes(CHARSET);
            byte[] lengthByte = Utils.int2Bytes(plainTextBytes.length);
            byte[] corpidBytes = corpId.getBytes(CHARSET);
            ByteArrayOutputStream byteStream = new ByteArrayOutputStream();
            byteStream.write(randomBytes);
            byteStream.write(lengthByte);
            byteStream.write(plainTextBytes);
            byteStream.write(corpidBytes);
            byte[] padBytes = PKCS7Padding.getPaddingBytes(byteStream.size());
            byteStream.write(padBytes);
            byte[] unencrypted = byteStream.toByteArray();
            byteStream.close();
            Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
            SecretKeySpec keySpec = new SecretKeySpec(aesKey, "AES");
            IvParameterSpec iv = new IvParameterSpec(aesKey, 0, 16);
            cipher.init(Cipher.ENCRYPT_MODE, keySpec, iv);
            byte[] encrypted = cipher.doFinal(unencrypted);
            String result = base64.encodeToString(encrypted);
            return result;
        } catch (Exception e) {
            throw new DingTalkEncryptException(DingTalkEncryptException.COMPUTE_ENCRYPT_TEXT_ERROR);
        }
    }

    /*
     * 对密文进行解密.
     * @param text 需要解密的密文
     * @return 解密得到的明文
     */
    private String decrypt(String text) throws DingTalkEncryptException {
        byte[] originalArr;
        try {
            // 设置解密模式为AES的CBC模式
            Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
            SecretKeySpec keySpec = new SecretKeySpec(aesKey, "AES");
            IvParameterSpec iv = new IvParameterSpec(Arrays.copyOfRange(aesKey, 0, 16));
            cipher.init(Cipher.DECRYPT_MODE, keySpec, iv);
            // 使用BASE64对密文进行解码
            byte[] encrypted = Base64.decodeBase64(text);
            // 解密
            originalArr = cipher.doFinal(encrypted);
        } catch (Exception e) {
            throw new DingTalkEncryptException(DingTalkEncryptException.COMPUTE_DECRYPT_TEXT_ERROR);
        }

        String plainText;
        String fromCorpid;
        try {
            // 去除补位字符
            byte[] bytes = PKCS7Padding.removePaddingBytes(originalArr);
            // 分离16位随机字符串,网络字节序和corpId
            byte[] networkOrder = Arrays.copyOfRange(bytes, 16, 20);
            int plainTextLegth = Utils.bytes2int(networkOrder);
            plainText = new String(Arrays.copyOfRange(bytes, 20, 20 + plainTextLegth), CHARSET);
            fromCorpid = new String(Arrays.copyOfRange(bytes, 20 + plainTextLegth, bytes.length), CHARSET);
        } catch (Exception e) {
            throw new DingTalkEncryptException(DingTalkEncryptException.COMPUTE_DECRYPT_TEXT_LENGTH_ERROR);
        }

        // corpid不相同的情况
        if (!fromCorpid.equals(corpId)) {
            throw new DingTalkEncryptException(DingTalkEncryptException.COMPUTE_DECRYPT_TEXT_CORPID_ERROR);
        }
        return plainText;
    }

    /**
     * 数字签名
     * @param token         isv token
     * @param timestamp     时间戳
     * @param nonce          随机串
     * @param encrypt       加密文本
     * @return
     * @throws DingTalkEncryptException
     */
    public String getSignature(String token, String timestamp, String nonce, String encrypt) throws DingTalkEncryptException {
        try {
            String[] array = new String[] { token, timestamp, nonce, encrypt };
            Arrays.sort(array);
            StringBuffer sb = new StringBuffer();
            for (int i = 0; i < 4; i++) {
                sb.append(array[i]);
            }
            String str = sb.toString();
            MessageDigest md = MessageDigest.getInstance("SHA-1");
            md.update(str.getBytes());
            byte[] digest = md.digest();

            StringBuffer hexstr = new StringBuffer();
            String shaHex = "";
            for (int i = 0; i < digest.length; i++) {
                shaHex = Integer.toHexString(digest[i] & 0xFF);
                if (shaHex.length() < 2) {
                    hexstr.append(0);
                }
                hexstr.append(shaHex);
            }
            return hexstr.toString();
        } catch (Exception e) {
            throw new DingTalkEncryptException(DingTalkEncryptException.COMPUTE_SIGNATURE_ERROR);
        }
    }

}

加解密异常类：

import java.util.HashMap;
import java.util.Map;

/**
 * 加解密异常类
 */
public class DingTalkEncryptException extends Exception {
    /**成功**/
    public static final int SUCCESS = 0;
    /**加密明文文本非法**/
    public final static int  ENCRYPTION_PLAINTEXT_ILLEGAL = 900001;
    /**加密时间戳参数非法**/
    public final static int  ENCRYPTION_TIMESTAMP_ILLEGAL = 900002;
    /**加密随机字符串参数非法**/
    public final static int  ENCRYPTION_NONCE_ILLEGAL = 900003;
    /**不合法的aeskey**/
    public final static int AES_KEY_ILLEGAL = 900004;
    /**签名不匹配**/
    public final static int SIGNATURE_NOT_MATCH = 900005;
    /**计算签名错误**/
    public final static int COMPUTE_SIGNATURE_ERROR = 900006;
    /**计算加密文字错误**/
    public final static int COMPUTE_ENCRYPT_TEXT_ERROR  = 900007;
    /**计算解密文字错误**/
    public final static int COMPUTE_DECRYPT_TEXT_ERROR  = 900008;
    /**计算解密文字长度不匹配**/
    public final static int COMPUTE_DECRYPT_TEXT_LENGTH_ERROR  = 900009;
    /**计算解密文字suiteKey(ISV)或者corpid(普通企业)不匹配**/
    public final static int COMPUTE_DECRYPT_TEXT_CORPID_ERROR  = 900010;

    private static Map<Integer,String> msgMap = new HashMap<Integer,String>();
    static{
        msgMap.put(SUCCESS,"成功");
        msgMap.put(ENCRYPTION_PLAINTEXT_ILLEGAL,"加密明文文本非法");
        msgMap.put(ENCRYPTION_TIMESTAMP_ILLEGAL,"加密时间戳参数非法");
        msgMap.put(ENCRYPTION_NONCE_ILLEGAL,"加密随机字符串参数非法");
        msgMap.put(SIGNATURE_NOT_MATCH,"签名不匹配");
        msgMap.put(COMPUTE_SIGNATURE_ERROR,"签名计算失败");
        msgMap.put(AES_KEY_ILLEGAL,"不合法的aes key");
        msgMap.put(COMPUTE_ENCRYPT_TEXT_ERROR,"计算加密文字错误");
        msgMap.put(COMPUTE_DECRYPT_TEXT_ERROR,"计算解密文字错误");
        msgMap.put(COMPUTE_DECRYPT_TEXT_LENGTH_ERROR,"计算解密文字长度不匹配");
        msgMap.put(COMPUTE_DECRYPT_TEXT_CORPID_ERROR,"计算解密文字suiteKey(ISV)或者corpid(普通企业)不匹配");
    }

    public Integer  code;
    public DingTalkEncryptException(Integer exceptionCode){
        super(msgMap.get(exceptionCode));
        this.code = exceptionCode;
    }
}

PKCS7算法的加密填充：

import java.nio.charset.Charset;
import java.util.Arrays;

/*
 * PKCS7算法的加密填充
 */

public class PKCS7Padding {
    private final static Charset CHARSET    = Charset.forName("utf-8");
    private final static int     BLOCK_SIZE = 32;

    /**
     * 填充mode字节
     * @param count
     * @return
     */
    public static byte[] getPaddingBytes(int count) {
        int amountToPad = BLOCK_SIZE - (count % BLOCK_SIZE);
        if (amountToPad == 0) {
            amountToPad = BLOCK_SIZE;
        }
        char padChr = chr(amountToPad);
        String tmp = new String();
        for (int index = 0; index < amountToPad; index++) {
            tmp += padChr;
        }
        return tmp.getBytes(CHARSET);
    }

    /**
     * 移除mode填充字节
     * @param decrypted
     * @return
     */
    public static byte[] removePaddingBytes(byte[] decrypted) {
        int pad = (int) decrypted[decrypted.length - 1];
        if (pad < 1 || pad > BLOCK_SIZE) {
            pad = 0;
        }
        return Arrays.copyOfRange(decrypted, 0, decrypted.length - pad);
    }

    private static char chr(int a) {
        byte target = (byte) (a & 0xFF);
        return (char) target;
    }

}

加解密工具类：

import java.util.Random;

/**
 * 加解密工具类
 */
public class Utils {
    /**
     *
     * @return
     */
    public static String getRandomStr(int count) {
        String base = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
        Random random = new Random();
        StringBuffer sb = new StringBuffer();
        for (int i = 0; i < count; i++) {
            int number = random.nextInt(base.length());
            sb.append(base.charAt(number));
        }
        return sb.toString();
    }

    /*
     * int转byte数组,高位在前
     */
    public static byte[] int2Bytes(int count) {
        byte[] byteArr = new byte[4];
        byteArr[3] = (byte) (count & 0xFF);
        byteArr[2] = (byte) (count >> 8 & 0xFF);
        byteArr[1] = (byte) (count >> 16 & 0xFF);
        byteArr[0] = (byte) (count >> 24 & 0xFF);
        return byteArr;
    }

    /**
     * 高位在前bytes数组转int
     * @param byteArr
     * @return
     */
    public static int bytes2int(byte[] byteArr) {
        int count = 0;
        for (int i = 0; i < 4; i++) {
            count <<= 8;
            count |= byteArr[i] & 0xff;
        }
        return count;
    }
}

接口方法：

/**
     * 通讯录：注册事件回调接口
     * @param accesstoken 企业的accesstoken
     * @param callBackTag  需要监听的事件类型，共有20种（Array[String]）
     * @param token      加解密需要用到的token，ISV(服务提供商)推荐使用注册套件时填写的token，普通企业可以随机填写
     * @param aesKey      数据加密密钥。用于回调数据的加密，长度固定为43个字符，从a-z, A-Z, 0-9共62个字符中选取,您可以随机生成，ISV(服务提供商)推荐使用注册套件时填写的EncodingAESKey
     * @param callBackUrl      接收事件回调的url
     * @return
     * @throws ApiException
     */
    public static JSONObject registerCallBack(String accesstoken,List<String> callBackTag,String token,String aesKey,String callBackUrl) throws ApiException{
        String url = CommomUrl.REGISTER_CALL_BACK.replace("ACCESS_TOKEN", accesstoken);
        JSONObject jsonReq = new JSONObject();
        jsonReq.put("call_back_tag", callBackTag);
        jsonReq.put("token", token);
        jsonReq.put("aes_key", aesKey);
        jsonReq.put("url", callBackUrl);

        System.out.println(jsonReq.toString());
        JSONObject jsonObject = doPostStr(url, jsonReq.toString());
        return jsonObject;
    }

    /**
     * 通讯录：查询事件回调接口
     * @param accesstoken  企业的accesstoken
     * @return
     */
    public static JSONObject getCallBack(String accesstoken){
        String url = CommomUrl.GET_CALL_BACK.replace("ACCESS_TOKEN", accesstoken);
        JSONObject jsonObject = doGetStr(url);
        return jsonObject;
    }

    /**
     * 通讯录：更新事件回调接口
     * @param accesstoken 企业的accesstoken
     * @param callBackTag  需要监听的事件类型，共有20种（Array[String]）
     * @param token      加解密需要用到的token，ISV(服务提供商)推荐使用注册套件时填写的token，普通企业可以随机填写
     * @param aesKey      数据加密密钥。用于回调数据的加密，长度固定为43个字符，从a-z, A-Z, 0-9共62个字符中选取,您可以随机生成，ISV(服务提供商)推荐使用注册套件时填写的EncodingAESKey
     * @param callBackUrl      接收事件回调的url
     * @return
     * @throws ApiException
     */
    public static JSONObject updateCallBack(String accesstoken,List<String> callBackTag,String token,String aesKey,String callBackUrl) throws ApiException{
        String url = CommomUrl.UPDATE_CALL_BACK.replace("ACCESS_TOKEN", accesstoken);
        JSONObject jsonReq = new JSONObject();
        jsonReq.put("call_back_tag", callBackTag);
        jsonReq.put("token", token);
        jsonReq.put("aes_key", aesKey);
        jsonReq.put("url", callBackUrl);

        JSONObject jsonObject = doPostStr(url, jsonReq.toString());
        return jsonObject;
    }

    /**
     * 通讯录：删除事件回调接口
     * @param accesstoken  企业的accesstoken
     * @return
     */
    public static JSONObject deleteCallBack(String accesstoken){
        String url = CommomUrl.DELETE_CALL_BACK.replace("ACCESS_TOKEN", accesstoken);
        JSONObject jsonObject = doGetStr(url);
        return jsonObject;
    }

    /**
     * 通讯录：获取回调失败的结果
     * @param accesstoken  企业的accesstoken
     * @return
     */
    public static JSONObject getCallBackFailedResult(String accesstoken){
        String url = CommomUrl.GET_CALL_BACK_FAILED_RESULT.replace("ACCESS_TOKEN", accesstoken);
        JSONObject jsonObject = doGetStr(url);
        return jsonObject;
    }

CommonUrl：

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * @version : 1.0
 * @Author : li_hao
 * @Description : 钉钉接口地址类
 * @Date : 2017-06-10 17:47
 **/
public class CommomUrl {
    private static Logger log = LoggerFactory.getLogger(CommomUrl.class);

    /** 注册事件回调接口（请求方式：post） */
    public static final String REGISTER_CALL_BACK = "https://oapi.dingtalk.com/call_back/register_call_back?access_token=ACCESS_TOKEN";

    /** 查询事件回调接口（请求方式：get） */
    public static final String GET_CALL_BACK = "https://oapi.dingtalk.com/call_back/get_call_back?access_token=ACCESS_TOKEN";

    /** 更新事件回调接口（请求方式：post） */
    public static final String UPDATE_CALL_BACK = "https://oapi.dingtalk.com/call_back/update_call_back?access_token=ACCESS_TOKEN";

    /** 删除事件回调接口（请求方式：get） */
    public static final String DELETE_CALL_BACK = "https://oapi.dingtalk.com/call_back/delete_call_back?access_token=ACCESS_TOKEN";

    /** 获取回调失败的结果 （请求方式：get）*/
    public static final String GET_CALL_BACK_FAILED_RESULT = "https://oapi.dingtalk.com/call_back/get_call_back_failed_result?access_token=ACCESS_TOKEN";

}

get请求、post请求：

/**
     * get请求
     * @param url 为接口地址参数
     * @return
     */
    public static JSONObject doGetStr(String url){
         CloseableHttpClient httpClient = HttpClients.createDefault();
         HttpGet httpGet = new HttpGet(url);
         CloseableHttpResponse response = null;
         JSONObject jsonObject = null;//接收结果
         try {
            response = httpClient.execute(httpGet);
            HttpEntity entity = response.getEntity();//从消息体里获取结果
            if(entity!=null){
                String result = EntityUtils.toString(entity,"UTF-8");
                jsonObject = JSONObject.parseObject(result);
            }
            EntityUtils.consume(entity);
        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                if(response != null){
                    response.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
         return jsonObject;
    }

    /**
     * post请求
     * @param url 为接口地址参数
     * @param outStr
     * @return
     */
    public static JSONObject doPostStr(String url,String outStr){
        CloseableHttpClient httpClient = HttpClients.createDefault();
        //DefaultHttpClient httpClient = new DefaultHttpClient();
        HttpPost httpPost = new HttpPost(url);
        JSONObject jsonObject = null;
        try {
            httpPost.setEntity(new StringEntity(outStr, "UTF-8"));
            HttpResponse response = httpClient.execute(httpPost);
            String result = EntityUtils.toString(response.getEntity(), "UTF-8");
            jsonObject = JSONObject.parseObject(result);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return jsonObject;
    }

以上就是通讯录同步的所有代码了，注：钉钉ISV回调加密解密的方法和上述加密解密方法相同。