开发前提，注册小程序获取appid和secret
小程序端添加授权按钮
<button class="weui-btn" type="primary" bindtap="showTopTips" open-type="getUserInfo" bindgetuserinfo="bindGetUserInfo">授权登录</button>
绑定授权事件
bindGetUserInfo: function (res) {app.login(function(){console.log("授权登录回调")wx.navigateBack({})});}
调用后台登录接口
login: function(callback) {var that = this;wx.login({success: function(res) {wx.request({url: that.globalData.domain + '/api/wechat/user/login',data: {code: res.code},success: function(res) {if (res.data.code == 1) {that.globalData.sessionKey = res.data.sessionKey; //暂时，不应该在网络传输// 去注册that.registerUser(callback);return;}if (res.data.code != 0) {// 登录错误 wx.hideLoading();wx.showModal({title: '提示',content: '无法登录，请重试',showCancel: false})return;}that.globalData.token = res.data.token;that.globalData.userInfo = res.data.userInfo;callback();}})}})},registerUser: function(callback) {var that = this;wx.login({success: function(res) {var code = res.code; // 微信登录接口返回的 code 参数，下面注册接口需要用到wx.getUserInfo({success: function(res) {var iv = res.iv;var encryptedData = res.encryptedData;var rawData = res.rawData;var signature = res.signature;// 下面开始调用注册接口wx.request({url: that.globalData.domain + '/api/wechat/user/register',data: {code: code,encryptedData: encryptedData,iv: iv,rawData: rawData,signature: signature,sessionKey: that.globalData.sessionKey}, // 设置请求的 参数success: (res) => {if (res.data.code == 0) {wx.hideLoading();that.login(callback);} else {// 登录错误 wx.hideLoading();wx.showModal({title: '提示',content: '无法登录，请重试',showCancel: false})}}})},fail: function(res) {console.log(res)}})}})},
后台接口由于封装了下看不出来具体请求，实际上是调用微信接口如下来换取openid 微信昵称等信息
https://api./sns/jscode2session?appid=APPID&secret=SECRET&js_code=JSCODE&grant_type=authorization_code
/*** 登陆接口*/@AuthIgnore@GetMapping("login")public R login(String code) {if (StringUtils.isBlank(code)) {return R.error("empty jscode");}try {WxMaJscode2SessionResult session = this.wxService.getUserService().getSessionInfo(code);this.logger.info(session.getSessionKey());this.logger.info(session.getOpenid());//查询用户信息UserEntity user = userService.queryByOpenid(session.getOpenid());if(user == null) {String sessionKey = session.getSessionKey();return R.error(1, "未注册").put("sessionKey", sessionKey);}//生成tokenMap<String, Object> map = tokenService.createToken(user.getId());map.put("userInfo", user);return R.ok(map);} catch (WxErrorException e) {this.logger.error(e.getMessage(), e);return R.error();}}
