小程序登录

导入依赖

   <!-- 阿里JSON解析器 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
        </dependency>
        <dependency>
            <groupId>com.squareup.okhttp3</groupId>
            <artifactId>okhttp</artifactId>
            <version>3.10.0</version>
        </dependency>

核心代码

  @Override
    @Transactional
    public ApiRe miniLogin(String jsCode) throws Exception {
        ApiRe re = new ApiRe();
        UserDTO userDTO = null;
        OkHttpClient okHttpClient = new OkHttpClient();
        String body = okHttpClient.newCall(new Request.Builder()
                .url("https://api.weixin.qq.com/sns/jscode2session?appid=" +  "自己的APPID"+
                        "&secret=" +  "自己的Secret"+
                        "&grant_type=authorization_code&js_code=" + jsCode).get().build()).execute().body().string();
        JSONObject jsonObject = JSONObject.parseObject(body);
        Integer errcode = jsonObject.getInteger("errcode");
        if (errcode == null || errcode == 0) {
            String miniOpenId = jsonObject.getString("openid");
            String session_key = jsonObject.getString("session_key");
            String unionid = jsonObject.getString("unionid");
            BusUser user = new BusUser();
           }
        }

手机号解密

导入依赖

  <dependency>
            <groupId>org.bouncycastle</groupId>
            <artifactId>bcprov-jdk16</artifactId>
            <version>1.46</version>
        </dependency>

核心代码

import java.nio.charset.StandardCharsets;
import java.security.AlgorithmParameters;
import java.security.Key;
import java.security.NoSuchAlgorithmException;
import java.security.Security;
import java.security.spec.InvalidParameterSpecException;
import java.util.Base64;
import java.util.Map;

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

import org.bouncycastle.jce.provider.BouncyCastleProvider;

import com.alibaba.fastjson.JSON;

public class AESForWeixinGetPhoneNumber {

    //加密方式
    private static String keyAlgorithm = "AES";
    //避免重复new生成多个BouncyCastleProvider对象，因为GC回收不了，会造成内存溢出
    //只在第一次调用decrypt()方法时才new 对象
    private static boolean initialized = false;
    //用于Base64解密
    private Base64.Decoder decoder = Base64.getDecoder();

    //待解密的数据（一定要最新的）
    private String originalContent;
    //会话密钥sessionKey（一定要最新的）
    private String encryptKey;
    //加密算法的初始向量（一定要最新的）
    private String iv;

    public AESForWeixinGetPhoneNumber(String originalContent,String encryptKey,String iv) {
        this.originalContent = originalContent;
        this.encryptKey = encryptKey;
        this.iv = iv;
    }

    /**
     * AES解密
     * 填充模式AES/CBC/PKCS7Padding
     * 解密模式128
     *
     * @return 解密后的信息对象
     */
    public Map decrypt() {
        initialize();
        try {
            //数据填充方式
            //Cipher cipher = Cipher.getInstance(“AES/CBC/PKCS7Padding”,”BC”);
            Cipher cipher = Cipher.getInstance("AES/CBC/PKCS7Padding");
            Key sKeySpec = new SecretKeySpec(decoder.decode(this.encryptKey), keyAlgorithm);
            // 初始化
            cipher.init(Cipher.DECRYPT_MODE, sKeySpec, generateIV(decoder.decode(this.iv)));
            byte[]data = https://www.wxapp-union.com/cipher.doFinal(decoder.decode(this.originalContent));
            String datastr = new String(data, StandardCharsets.UTF_8);
            return JSON.toJavaObject(JSON.parseObject(datastr),Map.class);
        } catch (Exception e) {
            System.out.println(e.getMessage());
            System.out.println(222);
            return null;
        }
    }

    /**BouncyCastle作为安全提供，防止我们加密解密时候因为jdk内置的不支持改模式运行报错。**/
    private static void initialize() {
        if (initialized) {
            return;
        }
        Security.addProvider(new BouncyCastleProvider());
        initialized = true;
    }

    // 生成iv
    private static AlgorithmParameters generateIV(byte[] iv) throws NoSuchAlgorithmException, InvalidParameterSpecException {
        AlgorithmParameters params = AlgorithmParameters.getInstance(keyAlgorithm);
        params.init(new IvParameterSpec(iv));
        return params;
    }
}

订阅消息

核心代码

 /**
     * 调用微信开放接口subscribeMessage.send发送订阅消息(固定模板的订阅消息)
     * POST https://api.weixin.qq.com/cgi-bin/message/subscribe/send?access_token=ACCESS_TOKEN
     * @param query
     */
    @Override
    public ApiRe send(Long id,SendQuery query){
        Calendar now = Calendar.getInstance();
        String dateTime = now.get(Calendar.YEAR)+"年"+(now.get(Calendar.MONTH) + 1)+
                "月"+now.get(Calendar.DAY_OF_MONTH)+"日 "+now.get(Calendar.HOUR_OF_DAY)+":"+now.get(Calendar.MINUTE)+":"+now.get(Calendar.SECOND);
        ApiRe re = new ApiRe();
        BusUser busUser = busUserMapper.selectById(id);
        HttpURLConnection httpConn = null;
        InputStream is = null;
        BufferedReader rd = null;
        String accessToken = null;
        String str = null;
        try
        {
            //获取token  小程序全局唯一后台接口调用凭据
            accessToken = getAccessToken();

            JSONObject xmlData = https://www.wxapp-union.com/new JSONObject();
            xmlData.put("touser", busUser.getOpenId());//接收者（用户）的 openid
            xmlData.put("template_id", "模板Id");//所需下发的订阅模板id
            if(!CommonUtil.isEmpty(query.getPage())){
                xmlData.put("page", query.getPage());//点击模板卡片后的跳转页面，仅限本小程序内的页面
            }
            if(!CommonUtil.isEmpty(query.getMiniprogramState())){
                xmlData.put("miniprogram_state", query.getMiniprogramState());//跳转小程序类型：developer为开发版；trial为体验版；formal为正式版；默认为正式版
            }
//            xmlData.put("lang", "zh_CN");//进入小程序查看”的语言类型，支持zh_CN(简体中文)、en_US(英文)、zh_HK(繁体中文)、zh_TW(繁体中文)，默认为zh_CN返回值

            /**
             * 订阅消息参数值内容限制说明
             thing.DATA:20个以内字符;可汉字、数字、字母或符号组合
             time.DATA:24小时制时间格式（支持+年月日），支持填时间段，两个时间点之间用“~”符号连接
             */

            JSONObject data = https://www.wxapp-union.com/new JSONObject();
            //订单编号
//            JSONObject number1 = new JSONObject();
//            number1.put("value", query.getOrderNo());
//            data.put("number1", number1);
            JSONObject character_string = new JSONObject();
            character_string.put("value", query.getOrderNo());
            data.put("character_string1", character_string);
            //状态
            JSONObject phrase2 = new JSONObject();
            phrase2.put("value", query.getStatus());
            data.put("phrase2", phrase2);
            //更新时间
            JSONObject date9 = new JSONObject();
            date9.put("value", dateTime);
//            data.put("date4", date4);
            data.put("date9", date9);
            //备注
            JSONObject thing6 = new JSONObject();
            thing6.put("value", query.getRemarks());
//            data.put("thing5", thing5);
            data.put("thing6", thing6);

            xmlData.put("data", data);//小程序模板数据

            System.out.println("发送模板消息xmlData:" + xmlData);
            URL url = new URL(
                    "https://api.weixin.qq.com/cgi-bin/message/subscribe/send?access_token="
                            + accessToken);
            httpConn = (HttpURLConnection)url.openConnection();
            httpConn.setRequestProperty("Host", "https://api.weixin.qq.com");
            // httpConn.setRequestProperty("Content-Length", String.valueOf(xmlData.));
            httpConn.setRequestProperty("Content-Type", "application/json; charset=\"UTF-8\"");
            httpConn.setRequestMethod("POST");
            httpConn.setDoInput(true);
            httpConn.setDoOutput(true);
            OutputStream out = httpConn.getOutputStream();
            OutputStreamWriter osw = new OutputStreamWriter(out, "UTF-8");
            osw.write(xmlData.toString());
            osw.flush();
            osw.close();
            out.close();
            is = httpConn.getInputStream();
            rd = new BufferedReader(new InputStreamReader(is, "UTF-8"));

            while ((str = rd.readLine()) != null)
            {
                System.out.println("返回数据：" + str);
                Map map = JSON.parseObject(str,Map.class);
                if((Integer) map.get("errcode")==0){
                    re.setMsg("订阅消息成功");
                    re.setCode(200);
                }else {
                    re.setCode(400);
                    re.setMsg("订阅消息失败");
                }
            }
        }
        catch (Exception e)
        {
            re.setCode(400);
            re.setMsg("系统异常，请联系管理员");
            System.out.println("发送模板消息失败.." + e.getMessage());
            return re;
        }
        return re;
    }

注：订阅消息模板一定要按照申请的模板（包括字段名称，传入类型）

每个字段对应能输入的字符：