小程序开发授权获取手机号绑定后台用户

前端：

注意事项：

前端获取手机号加密信息后不能再调用wx.login()接口，否则后端解密时大概率报错，小概率成功。

后端：

传参DTO

@Datapublic class AppletLoginDto {​@ApiModelProperty(value = "小程序获取手机号encryptedData")private String encryptedData;​@ApiModelProperty(value = "小程序获取手机号iv")private String iv;​@ApiModelProperty(value = "小程序登录授权code")private String code;}

实现类serviceImpl

public void login(AppletLoginDto dto) {//校验codeif (StringUtils.isNullOrEmpty(dto.getCode())) {throw ServiceErrCodeEnum.WX_ILLEGAL_LOGIN.getException();}String url = String.format(WechatAPI.WECHAT_LOGIN_URL, appletAppId, appletAppSecret, dto.getCode());String resultString = RequestUtil.doGet(url);if (StringUtils.isNullOrEmpty(resultString)) {throw ServiceErrCodeEnum.WX_ILLEGAL_LOGIN.getException();}JSONObject jsonObject = (JSONObject) JSONObject.parse(resultString);if (Objects.isNull(jsonObject)) {throw ServiceErrCodeEnum.WX_ILLEGAL_LOGIN.getException();}log.info("code:{}", JSON.toJSONString(jsonObject));String sessionKey = jsonObject.get("session_key") + "";String openid = jsonObject.get("openid") + "";String unionId = jsonObject.getString("unionid");​//拿手机号JSONObject phoneJson = WXUtils.getEncryptedData(dto.getEncryptedData(), sessionKey, dto.getIv());if (Objects.isNull(phoneJson)) {throw ServiceErrCodeEnum.WX_ILLEGAL_LOGIN.getException();}log.info("code:{}", JSON.toJSONString(phoneJson));String phoneNumber = phoneJson.getString("phoneNumber");​//业务逻辑：查询数据库是否已存在该手机号，无则注册//绑定openid​//=================自己的业务：生成token=================}

微信解密手机号工具类WXUtils

public class WXUtils {​public static JSONObject getEncryptedData(String encryptedData, String sessionkey, String iv) {// 被加密的数据//注意:第一个是ISO-8859-1,第二个是utf-8byte[] dataByte = Base64.decode(encryptedData);// 加密秘钥byte[] keyByte = Base64.decode(sessionkey);// 偏移量byte[] ivByte = Base64.decode(iv);try {// 如果密钥不足16位，那么就补足.这个if中的内容很重要int base = 16;if (keyByte.length % base != 0) {int groups = keyByte.length / base + 1;byte[] temp = new byte[groups * base];Arrays.fill(temp, (byte) 0);System.arraycopy(keyByte, 0, temp, 0, keyByte.length);keyByte = temp;}// 初始化Security.addProvider(new BouncyCastleProvider());Cipher cipher = Cipher.getInstance("AES/CBC/PKCS7Padding", "BC");SecretKeySpec spec = new SecretKeySpec(keyByte, "AES");AlgorithmParameters parameters = AlgorithmParameters.getInstance("AES");parameters.init(new IvParameterSpec(ivByte));cipher.init(Cipher.DECRYPT_MODE, spec, parameters);// 初始化byte[] resultByte = cipher.doFinal(dataByte);//            log.info("返回字节:{}", resultByte);if (null != resultByte && resultByte.length > 0) {String result = new String(resultByte, "UTF-8");//                log.info("加密解密结果:{}", result);return JSONObject.parseObject(result);}} catch (Exception e) {e.printStackTrace();//            log.error("解密加密信息报错:{}", e.getMessage());}return null;}}

微信WechatAPI封装类

public class WechatAPI {​//获取token请求地址  GETpublic static final String TOKEN_URL = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=%s&secret=%s";​//发送公众号模板消息地址  POSTpublic static final String TEMPLATE_URL = "https://api.weixin.qq.com/cgi-bin/message/template/send?access_token=%s";​//获取关注公众号用户的openId列表地址 GETpublic static final String USER_OPEN_ID_LIST_URL = "https://api.weixin.qq.com/cgi-bin/user/get?access_token=%s&next_openid=%s";​//获取用户详情地址  GETpublic static final String USER_INFO_URL = "https://api.weixin.qq.com/cgi-bin/user/info?access_token=%s&openid=%s";​//获取临时二维码ticket地址public static final String QR_SCENE_URL = "https://api.weixin.qq.com/cgi-bin/qrcode/create?access_token=%s";​//通过ticket换取二维码地址public static final String QR_TICKET_URL = "https://mp.weixin.qq.com/cgi-bin/showqrcode?ticket=%s";​//通过公众号的openId获取unionIdpublic static final String GET_UNION_ID_URL = "https://api.weixin.qq.com/cgi-bin/user/info?access_token=%s&openid=%s&lang=zh_CN";​​public static final String WXA_CODE_UNLIMIT_URL = "https://api.weixin.qq.com/wxa/getwxacodeunlimit?access_token=%s";​//获取小程序的登录信息public static final String WECHAT_LOGIN_URL = "https://api.weixin.qq.com/sns/jscode2session?appid=%s&secret=%s&js_code=%s&grant_type=authorization_code";​//小程序消息推送public static final String PULL_MESSAGE_URL = "https://api.weixin.qq.com/cgi-bin/message/subscribe/send?access_token=%s";​//文本内容检测接口public static final String AUTH_CONTENT_CHECK_URL = "https://api.weixin.qq.com/wxa/msg_sec_check?access_token=%s";public static final String AUTH_CONTENT_CHECK_URL2 = "https://api.weixin.qq.com/wxa/servicemarket?access_token=%s";//图片检测接口public static final String AUTH_IMG_CHECK_URL = "https://api.weixin.qq.com/wxa/img_sec_check?access_token=%s";}

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