一、獲取apikey,appsecret與商戶號
註冊公眾號、商戶號
二、獲取用戶的OpenId
1.設置【授權回調頁面域名】
官方解釋:用戶在網頁授權頁同意授權給公眾號後,微信會將授權數據傳給一個回調頁面,回調頁面需在此域名下,以確保安全可靠。回調頁面域名不支持IP地址。
2.用戶同意授權
我是把這個url寫在微信菜單下的,當進入這個頁面的時候就讓用戶同意。注意:好像是靜默授權的,用戶不知道
1.url:
https://open.weixin.qq.com/connect/oauth/authorize?appid=appid&redirect_uri=url&response_type=code&scope=snsapi_userinfo&state=park#wechat_redirect
參數:appid:公眾號的唯一標識
redirect_uri:重定向的url,就是授權後要跳轉的頁面
scope:應用授權作用域
snsapi_base:不彈出授權頁面,直接跳轉,只能獲取用戶openid
snsapi_userinfo:彈出授權頁面,可通過openid拿到暱稱、性別、所在地
state:重定向後帶的參數
2.用戶同意後會產生一個code,只有分鐘時間的有效期。
String code = request.getParameter("code")3.code換openId
/** * 常量類* @author rory.wu * */public class Constants { // 第三方用戶唯一憑證public static String appid = ""; // 第三方用戶唯一憑證密鑰public static String appsecret = "" ; //商戶ID public static String mch_id=""; //獲取openId public static String oauth_url = "https://api.weixin.qq.com/sns/oauth/access_token?appid=APPID&secret=SECRET&code=CODE&grant_type=authorization_code ";} /** * 通用工具類* @author rory.wu * @version . * @since 年月日*/ public class CommonUtil { private static Logger log = Logger.getLogger(CommonUtil.class); 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) { log.error ("連接超時:"+ce.getMessage()); } catch (Exception e) { log.error("https請求異常:"+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(requestUrl); 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- ")); outputStream.close(); } // 從輸入流讀取返回內容InputStream inputStream = connection.getInputStream(); InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "utf-"); 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; } } /** * 獲取用戶的openId,並放入session * @param code 微信返回的code */ private void setOpenId(String code) { session.put("code", code); String oauth_url = Constants.oauth_url.replace("APPID", Constants.appid).replace("SECRET", Constants.appsecret).replace("CODE", String .valueOf(session.get("code"))); log.info("oauth_url:"+oauth_url); JSONObject jsonObject = CommonUtil.httpsRequestToJsonObject(oauth_url, "POST", null); log.info("jsonObject:" +jsonObject); Object errorCode = jsonObject.get("errcode"); if(errorCode != null) { log.info("code不合法"); }else{ String openId = jsonObject.getString("openid"); log.info("openId:"+openId); session.put("openId", openId); } }oauth_url返回的格式是: { "access_token":"ACCESS_TOKEN", "expires_in":, "refresh_token":" REFRESH_TOKEN", "openid":"OPENID", "scope":"SCOPE", "unionid": "o_bmasdasdsad_sgVthMZOPfL" }Code無效時: { "errcode": ,"errmsg":"invalid code" }以上內容就是武林網的小編給大家分享的微信公眾號支付(一)如何獲取用戶openId,希望大家喜歡。