// 获取用户手机号
public static JSONObject getPhoneNumber(String appId, String secret, String code) {
    //通过appid和secret来获取token
    //WXContent.APPID是自定义的全局变量
    String tokenUrl = String.format("https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=%s&secret=%s", appId, secret);
    com.alibaba.fastjson.JSONObject token = JSON.parseObject(HttpUtil.get(tokenUrl));

    //通过token和code来获取用户手机号
    String url = "https://api.weixin.qq.com/wxa/business/
?access_token=" + token.getString("access_token");

    //封装请求体
    Map paramMap = new HashMap<>();
    paramMap.put("code", code);

    HttpHeaders headers = new HttpHeaders();
    headers.setContentType(MediaType.APPLICATION_JSON);

    HttpEntity> httpEntity = new HttpEntity<>(paramMap,headers);

    RestTemplate restTemplate = new RestTemplate();
    ResponseEntity response = restTemplate.postForEntity(url, httpEntity, Object.class);

    return new JSONObject(response.getBody());
}