微信小程序調用微信登陸獲取openid及java做為服務端示例

一、微信小程序<br />第一步：調用wx.login獲取code 文檔地址第二步：判斷用戶是否授權讀取用戶信息文檔地址第三步：調用wx.getUserInfo讀取用戶數據文檔地址第四步：由於小程序後台授權域名無法授權微信的域名，所以我們只能通過我們自己的服務器去調用微信服務器去獲取用戶信息，故我們將wx.login獲取code 和wx.getUserInfo 獲取的encryptedData與iv 通過wx.request 請求傳入後台

服務器返回的數據：

小程序代碼：

 //調用登錄接口，獲取code wx.login({ success: function (res) { wx.getSetting({ success(setRes) { // 判斷是否已授權if (!setRes.authSetting['scope.userInfo']) { // 授權訪問wx.authorize({ scope: 'scope.userInfo', success() { //獲取用戶信息wx.getUserInfo({ lang: "zh_CN", success: function (userRes) { //發起網絡請求wx.request({ url: config.loginWXUrl, data: { code: res.code, encryptedData: userRes.encryptedData, iv: userRes.iv }, header: { "Content-Type": "application/x-www-form-urlencoded" }, method: 'POST', //服務端的回掉success: function (result) { var data = result.data.result; data.expireTime = nowDate + EXPIRETIME; wx.setStorageSync("userInfo", data); userInfo = data; } }) } }) } }) } else { //獲取用戶信息wx.getUserInfo({ lang: "zh_CN", success: function (userRes) { //發起網絡請求wx.request({ url: config.loginWXUrl, data: { code: res.code, encryptedData: userRes.encryptedData, iv: userRes.iv }, header: { "Content-Type": "application/x-www-form-urlencoded" }, method: 'POST', success: function (result) { var data = result.data.result; data.expireTime = nowDate + EXPIRETIME; wx.setStorageSync("userInfo", data); userInfo = data; } }) } }) } } }) } })

二、java服務端

根據code獲取openid與解碼用戶信息代碼

所需要的jar包

<dependency> <groupId>org.codehaus.xfire</groupId> <artifactId>xfire-core</artifactId> <version>1.2.6</version> </dependency> <dependency> <groupId>org.bouncycastle</groupId> <artifactId>bcprov-jdk16</artifactId> <version>1.46</version> </dependency>

 /** * 微信小程序信息獲取* * @author zhy */ public class WXAppletUserInfo { private static Logger log = Logger.getLogger(WXAppletUserInfo.class); /** * 獲取微信小程序session_key 和openid * * @author zhy * @param code 調用微信登陸返回的Code * @return */ public static JSONObject getSessionKeyOropenid(String code){ //微信端登錄code值String wxCode = code; ResourceBundle resource = ResourceBundle.getBundle("weixin"); //讀取屬性文件String requestUrl = resource.getString("url"); //請求地址https://api.weixin.qq.com/sns/jscode2session Map<String,String> requestUrlParam = new HashMap<String,String>(); requestUrlParam.put("appid", resource.getString("appId")); //開發者設置中的appId requestUrlParam.put("secret", resource.getString("appSecret")); //開發者設置中的appSecret requestUrlParam.put("js_code", wxCode); //小程序調用wx.login返回的code requestUrlParam.put("grant_type", "authorization_code"); //默認參數//發送post請求讀取調用微信https://api.weixin.qq.com/sns/jscode2session 接口獲取openid用戶唯一標識JSONObject jsonObject = JSON.parseObject(UrlUtil.sendPost(requestUrl, requestUrlParam)); return jsonObject; } /** * 解密用戶敏感數據獲取用戶信息* * @author zhy * @param sessionKey 數據進行加密簽名的密鑰* @param encryptedData 包括敏感數據在內的完整用戶信息的加密數據* @param iv 加密算法的初始向量* @return */ public static JSONObject getUserInfo(String encryptedData,String sessionKey,String iv){ // 被加密的數據byte[] dataByte = Base64.decode(encryptedData); // 加密秘鑰byte[] keyByte = Base64.decode(sessionKey); // 偏移量byte[] ivByte = Base64.decode(iv); try { // 如果密鑰不足16位，那麼就補足. 這個if 中的內容很重要int base = 16; if (keyByte.length % base != 0) { int groups = keyByte.length / base + (keyByte.length % base != 0 ? 1 : 0); byte[] temp = new byte[groups * base]; Arrays.fill(temp, (byte) 0); System.arraycopy(keyByte, 0, temp, 0, keyByte.length); keyByte = temp; } // 初始化Security.addProvider(new BouncyCastleProvider()); Cipher cipher = Cipher.getInstance("AES/CBC/PKCS7Padding","BC"); SecretKeySpec spec = new SecretKeySpec(keyByte, "AES"); AlgorithmParameters parameters = AlgorithmParameters.getInstance("AES"); parameters.init(new IvParameterSpec(ivByte)); cipher.init(Cipher.DECRYPT_MODE, spec, parameters);// 初始化byte[] resultByte = cipher.doFinal(dataByte); if (null != resultByte && resultByte.length > 0) { String result = new String(resultByte, "UTF-8"); return JSON.parseObject(result); } } catch (NoSuchAlgorithmException e) { log.error(e.getMessage(), e); } catch (NoSuchPaddingException e) { log.error(e.getMessage(), e); } catch (InvalidParameterSpecException e) { log.error(e.getMessage(), e); } catch (IllegalBlockSizeException e) { log.error(e.getMessage(), e); } catch (BadPaddingException e) { log.error(e.getMessage(), e); } catch (UnsupportedEncodingException e) { log.error(e.getMessage(), e); } catch (InvalidKeyException e) { log.error(e.getMessage(), e); } catch (InvalidAlgorithmParameterException e) { log.error(e.getMessage(), e); } catch (NoSuchProviderException e) { log.error(e.getMessage(), e); } return null; } }

發送請求的代碼

 /** * 向指定URL 發送POST方法的請求* * @param url 發送請求的URL * @param param 請求參數* @return 所代表遠程資源的響應結果*/ ublic static String sendPost(String url, Map<String, ?> paramMap) { PrintWriter out = null; BufferedReader in = null; String result = ""; String param = ""; Iterator<String> it = paramMap.keySet().iterator(); while(it.hasNext()) { String key = it.next(); param += key + "=" + paramMap.get(key) + "&"; } try { URL realUrl = new URL(url); // 打開和URL之間的連接URLConnection conn = realUrl.openConnection(); // 設置通用的請求屬性conn.setRequestProperty("accept", "*/*"); conn.setRequestProperty("connection", "Keep-Alive"); conn.setRequestProperty("Accept-Charset", "utf-8"); conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)"); // 發送POST請求必須設置如下兩行conn.setDoOutput(true); conn.setDoInput(true); // 獲取URLConnection對像對應的輸出流out = new PrintWriter(conn.getOutputStream()); // 發送請求參數out.print(param); // flush輸出流的緩衝out.flush(); // 定義BufferedReader輸入流來讀取URL的響應in = new BufferedReader(new InputStreamReader(conn.getInputStream(), "UTF-8")); String line; while ((line = in.readLine()) != null) { result += line; } } catch (Exception e) { log.error(e.getMessage(), e); } //使用finally塊來關閉輸出流、輸入流finally{ try{ if(out!=null){ out.close(); } if(in!=null){ in.close(); } } catch(IOException ex){ ex.printStackTrace(); } } return result; }

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