通过微信小程序code获取openid_通过code获取openid

 通过code换取openid

通过微信小程序code获取openid

 @PostMapping("/getOpenid")
    @CrossOrigin
    @ResponseBody
    public Map<String,Object> getOpenid(@RequestBody byte[] req)
    {
        HashMap<String, Object> objectObjectMap = new HashMap<>();
        JSONObject json = JSONObject.parseObject(new String(req, Charset.forName("UTF-8")));
        System.out.println("请求参数"+json);
 
        String code = json.get("code").toString();
 
 
        //请求参数
        String params = "appid=" + appid + "&secret=" + 微信密钥 + "&js_code=" + code + "&grant_type=" + grant_type;
        //发送请求
        String sr = HttpUtils.sendGet("https://api.weixin.qq.com/sns/jscode2session" , params);
 
        JSONObject objects = JSONObject.parseObject(sr);
 
        Object openId = objects.get("openid");
        
    }