微信小程序微信登录 springboot

港控/mmm° 2022-10-29 07:57 233阅读 0赞

这个太简单了，直接放代码了，通俗的讲就是根据客服端获取的code，来和微信开发平台换取  
openId 和sessionKey 这两东西咋用就看开发者，openId是微信的唯一标识符，每个人都不一样（在同一个应用中每次登录是一样的）。

private String openid;
        private String session_key;
        //开发者平台申请
        private String appId="";
        private String secret="";
    
        @GetMapping("/wxLogin")
        private String login(String code) { 
            // 创建Httpclient对象
            CloseableHttpClient httpclient = HttpClients.createDefault();
            String resultString = "";
            CloseableHttpResponse response = null;
            String url="https://api.weixin.qq.com/sns/jscode2session?appid="+appId+"&secret="+secret+"&js_code="+code+"&grant_type=authorization_code";
            try { 
                // 创建uri
                URIBuilder builder = new URIBuilder(url);
                URI uri = builder.build();
                // 创建http GET请求
                HttpGet httpGet = new HttpGet(uri);
                // 执行请求
                response = httpclient.execute(httpGet);
                // 判断返回状态是否为200
                if (response.getStatusLine().getStatusCode() == 200) { 
                    resultString = EntityUtils.toString(response.getEntity(), "UTF-8");
                }
            } catch (Exception e) { 
                e.printStackTrace();
            }
            // 解析json
            com.alibaba.fastjson.JSONObject jsonObject = (com.alibaba.fastjson.JSONObject) com.alibaba.fastjson.JSONObject.parse(resultString);
            session_key = jsonObject.get("session_key")+"";
            openid = jsonObject.get("openid")+"";
            return resultString;
        }