微信公众号获取用户openId（扩展：小程序获取openId和手机号）

小灰灰 2022-11-27 12:24 873阅读 0赞

### **微信公众号获取用户openId** ###

拼接的参数【可以直接配菜单中】：

[https://open.weixin.qq.com/connect/oauth2/authorize?appid=wxb2363dd5274190f4&redirect\_uri=http://www.xxx.site/login&response\_type=code&scope=snsapi\_base&state=test\#wechat\_redirect][https_open.weixin.qq.com_connect_oauth2_authorize_appid_wxb2363dd5274190f4_redirect_uri_http_www.xxx.site_login_response_type_code_scope_snsapi_base_state_test_wechat_redirect]

遇到的坑：

**redirect\_uri参数错误**

注意要点：[redirect\_uri][https_open.weixin.qq.com_connect_oauth2_authorize_appid_wxb2363dd5274190f4_redirect_uri_http_www.xxx.site_login_response_type_code_scope_snsapi_base_state_test_wechat_redirect]回调的地址不能是网站根目录……我特么气死，所以默认进入跳转login页面；

文章传送门：

[官方文档说明][Link 1]

[微信授权获取用户openId的方法和步骤][openId]

### 扩展：小程序获取openId和手机号 ###

[点击查看详情][Link 2]

示例代码：

/**
     * 微信小程序获取用户信息
     * isRegister：是否已注册官网账号
     */
    @ApiOperation(value = "微信小程序获取用户信息",httpMethod = "POST", notes = "微信小程序获取用户信息")
    @RequestMapping(value = "/WeChat/userInfo", method = RequestMethod.POST, produces = "application/json; charset=utf-8")
    @ResponseBody
    public String WeChatUserInfo(@RequestParam("code") String code,
                                 @RequestParam("encryptedData") String encryptedData,
                                 @RequestParam("iv") String iv) throws Exception {
        String result = HttpClientUtils.GET_REQUEST("https://api.weixin.qq.com/sns/jscode2session?appid=公众号appid&secret=公众号秘钥&js_code="+code+"&grant_type=authorization_code");
        System.out.println(result);
        Result resultReturn = new Result();
        try {
            //请求成功sessionMap即可拿到openid和session-key
            Map sessionMap = JSON.parseObject(result, Map.class);
            String sessionKey = (String) sessionMap.get("session_key");
            //解密
            String mobileResult = AESDecodeUtils.decrypt(sessionKey,iv,encryptedData);
            Map mobileMap = JSON.parseObject(mobileResult, Map.class);
            //purePhoneNumber-没有区号的手机号
            String mobileNo = (String) mobileMap.get("purePhoneNumber");
            Map userInfo = userService.findUserByMobileNo(mobileNo);
            resultReturn.setSuccess(true);
            if (userInfo == null){
                userInfo = new HashMap();
                resultReturn.setMsg(mobileNo+"手机号未注册");
                userInfo.put("mobileNo",mobileNo);
                userInfo.put("isRegister",false);
            }else{
                userInfo.put("isRegister",true);
            }
            resultReturn.setObj(userInfo);
        }catch (Exception e){
            e.printStackTrace();
            logger.error("小程序获取个人信息失败！"+e.getMessage());
            resultReturn.setMsg("获取个人信息失败！");
        }
        return JSON.toJSONString(resultReturn);
    }

OKK的感觉都很简单………………为什么早些年才入行的时候感觉那么蛋痛呢？？？

[https_open.weixin.qq.com_connect_oauth2_authorize_appid_wxb2363dd5274190f4_redirect_uri_http_www.xxx.site_login_response_type_code_scope_snsapi_base_state_test_wechat_redirect]: https://open.weixin.qq.com/connect/oauth2/authorize?appid=wxb2363dd5274190f4&redirect_uri=http://www.hggtest.site/login&response_type=code&scope=snsapi_base&state=test#wechat_redirect
[Link 1]: https://developers.weixin.qq.com/doc/offiaccount/OA_Web_Apps/Wechat_webpage_authorization.html
[openId]: https://blog.csdn.net/qq_35430000/article/details/79299529
[Link 2]: https://www.jianshu.com/p/3f4b94f3ed33