java 微信小程序登录

微信登录

开发前准备（必须）

　　小程序标识（appid）：wx4d4838ebec29b8**

　　小程序秘钥（secret）：4fd6ca38a1261f96cbc0314c5675b9**

登录微信官网： https://developers.weixin.qq.com/miniprogram/dev/api-backend/open-api/login/auth.code2Session.html

根据官方文档

java 登录接口

//前端传给你的code 
public void wxlogin(String code) {

　　　　　//填写你小程序的appid 和 secret ,  还有前端传给你的code ,最后一个参数是固定的
        String token_url = "https://api.weixin.qq.com/sns/jscode2session?appid=" + WxConfig.APP_ID + "&secret=" + WxConfig.SECRET + "&js_code=" + code + "&grant_type=authorization_code";
        JSONObject access_token = httpsRequestToJsonObject(token_url, "GET", null);
　　　　　

//        openid    string    用户唯一标识 这个就是你微信用户标识
        String openid = access_token.getString("openid");
//        session_key    string    会话密钥
        String session_key = access_token.getString("session_key");
//        errcode    number    错误码
        String errcode = access_token.getString("errcode");
//        errmsg    string    错误信息
        String errmsg = access_token.getString("errmsg");

        if ("-1".equals(errcode)) {
            System.err.println(errmsg);
            return;
        }
        if ("4029".equals(errcode)) {
            System.err.println(errmsg);
            return;
        }
        if ("45011".equals(errcode)) {
            System.err.println(errmsg);
            return;
        } else {
            //证明没问题
            //保存openid 到你的数据库， 调用你的service 业务  
        }

    }

    public static JSONObject httpsRequestToJsonObject(String requestUrl, String requestMethod, String outputStr) {
        JSONObject jsonObject = null;
        try {
            StringBuffer buffer = httpsRequest(requestUrl, requestMethod, outputStr);
            jsonObject = JSONObject.fromObject(buffer.toString());
        } catch (ConnectException ce) {
            System.err.println("请求连接超时"+ce);
        } catch (Exception e) {
            System.err.println("https请求异常：" + e.getMessage());
        }
        return jsonObject;
    }

    private static StringBuffer httpsRequest(String requestUrl, String requestMethod, String output)
            throws NoSuchAlgorithmException, NoSuchProviderException, KeyManagementException, MalformedURLException,
            IOException, ProtocolException, UnsupportedEncodingException {
        URL url = new URL(null, requestUrl, new Handler());
        HttpsURLConnection connection = (HttpsURLConnection) url.openConnection();
        connection.setDoOutput(true);
        connection.setDoInput(true);
        connection.setUseCaches(false);
        connection.setRequestMethod(requestMethod);
        if (null != output) {
            OutputStream outputStream = connection.getOutputStream();
            outputStream.write(output.getBytes("UTF-8"));
            outputStream.close();
        }
        // 从输入流读取返回内容
        InputStream inputStream = connection.getInputStream();
        InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "utf-8");
        BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
        String str = null;
        StringBuffer buffer = new StringBuffer();
        while ((str = bufferedReader.readLine()) != null) {
            buffer.append(str);
        }
        bufferedReader.close();
        inputStreamReader.close();
        inputStream.close();
        inputStream = null;
        connection.disconnect();
        return buffer;
    }

如果 appid 和secret 没错的话这样就百分百没问题了！

来源：oschina

链接：https://my.oschina.net/u/4408924/blog/3409217

标签

openid

java

微信小程序