微信小程序登录-手机号授权并获取手机号

做微信小程序时，记录实现微信小程序登录

这里已经获取用户openId和sessionKey

1、通过按钮触发手机号授权

必须要通过按钮触发授权，open-type='getPhoneNumber'不能少

<button open-type='getPhoneNumber' @getphonenumber='onGetPhoneNumber'>手机号授权登录</button>

需要通过后台进行解析

onGetPhoneNumber(e) {if (e.detail.errMsg == "getPhoneNumber:fail user deny") {// 用户拒绝授权 // 拒绝授权后弹出一些提示 uni.showToast({icon: 'error',duration: 2000,title: '登录失败'})} else { // 允许授权 console.log('-加密的用户信息-', e.detail)// e.detail.encryptedData //加密的用户信息 // e.detail.iv //加密算法的初始向量 时要用到 // 调用接口获取手机号并修改小程序登录状态及相关信息this.$myRequest({url: '后台接口url（去后台解析加密的用户信息）',data: {encryptedData: e.detail.encryptedData,iv: e.detail.iv,sessionKey: that.sessionKey}}).then(rest => {console.log('返回的手机号', rest.message);})}}

后台解析springboot

AESUtils工具

public class AESUtils {public static boolean initialized = false;/*** AES解密** @param content 密文* @return* @throws InvalidAlgorithmParameterException* @throws NoSuchProviderException*/public byte[] decrypt(byte[] content, byte[] keyByte, byte[] ivByte) throws InvalidAlgorithmParameterException {initialize();try {Cipher cipher = Cipher.getInstance("AES/CBC/PKCS7Padding");Key sKeySpec = new SecretKeySpec(keyByte, "AES");cipher.init(Cipher.DECRYPT_MODE, sKeySpec, generateIV(ivByte));// 初始化byte[] result = cipher.doFinal(content);return result;} catch (NoSuchAlgorithmException e) {e.printStackTrace();} catch (NoSuchPaddingException e) {e.printStackTrace();} catch (InvalidKeyException e) {e.printStackTrace();} catch (IllegalBlockSizeException e) {e.printStackTrace();} catch (BadPaddingException e) {e.printStackTrace();} catch (NoSuchProviderException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();}return null;}public static void initialize() {if (initialized) {return;}Security.addProvider(new BouncyCastleProvider());initialized = true;}//生成ivpublic static AlgorithmParameters generateIV(byte[] iv) throws Exception {AlgorithmParameters params = AlgorithmParameters.getInstance("AES");params.init(new IvParameterSpec(iv));return params;}}

@GetMapping(value = "/getPhoneNumber")public Result getPhoneNumber(@RequestParam(required = true, value = "encryptedData") String encryptedData,@RequestParam(required = true, value = "iv") String iv,@RequestParam(required = true, value = "sessionKey") String sessionKey) throws UnsupportedEncodingException, InvalidAlgorithmParameterException, JSONException {Result result = new Result();//AESUtils微信获取手机号解密工具类AESUtils aes = new AESUtils();//调用AESUtils工具类decrypt方法解密获取json串byte[] resultByte = aes.decrypt(Base64.decodeBase64(encryptedData), Base64.decodeBase64(sessionKey), Base64.decodeBase64(iv));//判断返回参数是否为空if (null != resultByte && resultByte.length > 0) {String jsons = new String(resultByte, "UTF-8");System.out.println(jsons);JSONObject json = new JSONObject(jsons);//json解析phoneNumber值String phoneNumber = json.getString("phoneNumber");System.out.println("phoneNumber：" + phoneNumber);return result;}return result.error("session_key:失败");}