H5调起微信扫一扫

import jWeixin from 'jweixin-module';

let allowUrl = `https://open.weixin.qq.com/connect/oauth2/authorize?appid=${WXappid}&redirect_uri=${encodeURIComponent(WXredirectUrl)}&response_type=code&scope=${WXscope}&state=STATE#wechat_redirect`;

  
window.location.replace(allowUrl);

  
wxGetTicketInfo({urlInfo: location.href.split('#')[0]}).then(res=>{

    jWeixin.config({

     debug: false,  
     appId: res.data服务器托管网.appid, // 必填，公众号的唯一标识

     timestamp: res.data.timestamp, // 必填，生成签名的时间戳

     nonceStr: res.data.noncestr, // 必填，生成签名的随机串

        signature: res.data.signature,// 必填，签名

     jsApiList: this.jsApiList // 必填，需要使用的JS接口列表

    });

})

  
  
jWeixin.scanQRCode({

	needResult: 1, // 默认为0，扫描结果由微信处理，1则直接返回扫描结果，

	scanType: ["qrCode","barCode"], // 可以指定扫二维码还是一维码，默认二者都有

	success: function (res) {

      

	},

	fail: function(err){

  // console.log('扫描失败:',err);

  uni.showModal({

  	title:'温馨提示',

  	content:'扫描失败，请重新扫码',

  	showCancel:false,

  	confirmText:'我知道了'

  })

	}

});

@RequestMapping("/login")

public void login(HttpServletResponse response) throws IOException {

	int type = weChatScan.getType();

    String redirect_uri = "http://xxx.xxx.xxx.xxx/api/scan/wxCallBackInfo"

	//请求地址

	String url = "https://open.weixin.qq.com/connect/oauth2/authorize" +

  	"?appid=" + appid +

  	"&redirect_uri=" + URLEncoder.encode(redirect_uri, "UTF-8") +

  	"&response_type=code" +

  	"&scope=" + baseScope +

  	"&state=STATE#wechat_redirect";

	//重定向

	String s = HttpUtil.get(url);

	response.sendRedirect(url);

}

  
// 回调方法

@GetMapping("/wxCallBackInfo")

public void wxCallBackInfo(WeChatScanDto weChatScan, HttpServletResponse response, @RequestParam("code") String code) {

	Map resultMap = new HashMap();

	String url = "https://api.weixin.qq.com/sns/oauth2/access_token" +

  	"?appid=" + appid +

  	"&secret=" + appsecret +

  	"&code=" + code +

  	"&grant_type=" + grant_type;

	try {

  String s = HttpUtil.get(url);

  //返回结果的json对象

  JSONObject resultObject = JSON.parseObject(s);

  String openid = resultObject.getString("openid");

  response.sendRedirect(scan_url + "?openId=" + openid);

	} catch (Exception e) {

  String message = e.getMessage();

  AesException aesException = new AesException(AesException.NoBindBuffer);

  if (!aesException.getMessage().equals(message)) {

  	message = "微信扫码失败，请联系管理员！";

  }

	}

}

  
//获取前端所需的ticket

@GetMapping("/wxGetTicketInfo")

public AjaxResult wxLogin(HttpServletRequest request, String urlInfo) {

	WxConfig wxConfig = SpringUtils.getBean(WxConfig.class);

	String accessToken = redisCache.getCacheObject("wx_access_token");

	if(StringUtils.isEmpty(accessToken)){

  new WxUtil().createWxAccessToken();

  accessToken = redisCache.getCacheObject("wx_access_token");

	}

	String ticket = redisCache.getCacheObject("wx_ticket");

	Map map = redisCache.getCacheObject("wx_signature_map");

	if(StringUtils.isEmpty(ticket)){

  String ticketUrl = wxConfig.getTicket_url() + "?access_token=" + accessToken + "&type=jsapi";

  try{

  	String ticketInfo = HttpUtil.get(ticketUrl);

  	JSONObject ticketObject = JSON.parseObject(ticketInfo);

  	String errcode = ticketObject.getString("errcode");

  	if (!"0".equals(errcode)) {

    logger.info(ticketObject.toString());

    new WxUtil().createWxAccessToken();

    accessToken = redisCache.getCacheObject("wx_access_token");

    ticketUrl = wxConfig.getTicket_url() + "?access_token=" + accessToken + "&type=jsapi";

    ticketInfo = HttpUtil.get(ticketUrl);

    ticketObject = JSON.parseObject(ticketInfo);

  	}

  	logger.info(ticketObject.toString());

  	ticket = ticketObject.getString("ticket");

  	Integer ticketExpiresIn = ticketObject.getInteger("expires_in");

  	redisCache.setCacheObject("wx_ticket", ticket, ticketExpiresIn, TimeUnit.SECONDS);

  	String noncestr = SHA1Util.randomUUID();//随机字符串

  	String timestamp = String.valueOf(System.currentTimeMillis()/1000);//时间戳

  	//4获取url

  	// 根据项目需要获取对应的url地址

  
  	//5、将参数排序并拼接字符串

  	String str = "jsapi_ticket=" + ticket + "&noncestr=" + noncestr + "tamp=" + timestamp + "&url=" + urlInfo;

  
  	//6、将字符串进行sha1加密

  	String signature = SHA1Util.SHA1(str);

  	map = new HashMap();

  	map.put("ur服务器托管网lInfo", urlInfo);

  	map.put("timestamp", timestamp);

  	map.put("ticket", ticketObject.getString("ticket"));

  	map.put("noncestr", noncestr);

  	map.put("signature", signature);

  	map.put("appid", wxConfig.getAppid());

  	redisCache.setCacheObject("wx_signature_map", map);

  }catch (Exception e){

  	logger.error("失败", e);

  	return AjaxResult.error("获取签名失败");

  }

	}

	return AjaxResult.success(map);

}