1. 确保有 调起微信扫一扫接口 权限，测试号可能不行；
2. 导入相关JS
<script type="text/javascript" /zepto_touch.js"></script><script type="text/javascript" src="http://res./open/js/jweixin-1.0.0.js"></script>
3. 页面触发扫码元素
<img src="../../../images/right.jpg" οnclick="scanCode()" class="img">
4. 相关JS代码
<script type="text/javascript">var _appId = "wxz88dbd30e5580e59";var _data = {appId : _appId,url : location.href,t : Math.random()};var _getWechatSignUrl = '/getWechatSign.do';// 获取微信签名$.ajax({url : _getWechatSignUrl,data : _data,success : function(o) {console.log(o);if (o.returnCode == "00") {wxConfig(o.detail[0].timestamp, o.detail[0].nonceStr, o.detail[0].signature);}}});function wxConfig(_timestamp, _nonceStr, _signature) {//alert('获取数据：'+_timestamp+'\n'+_nonceStr+'\n'+_signature);console.log('获取数据：' + _timestamp + '\n' + _nonceStr + '\n' + _signature);wx.config({debug : true, // 开启调试模式,调用的所有api的返回值会在客户端alert出来，若要查看传入的参数，可以在pc端打开，参数信息会通过log打出，仅在pc端时才会打印。appId : _appId, // 必填，公众号的唯一标识timestamp : _timestamp, // 必填，生成签名的时间戳nonceStr : _nonceStr, // 必填，生成签名的随机串signature : _signature,// 必填，签名，见附录1jsApiList : [ 'onMenuShareTimeline', 'onMenuShareAppMessage','onMenuShareQQ', 'onMenuShareWeibo', 'scanQRCode' ]// 必填，需要使用的JS接口列表，所有JS接口列表见附录2});}function scanCode() {wx.scanQRCode({needResult : 1,scanType : [ "qrCode", "barCode" ],success : function(res) {console.log(res)alert(JSON.stringify(res));var result = res.resultStr;},fail : function(res) {console.log(res)alert(JSON.stringify(res));}});}</script>
5.获取签名接口getWechatSign.do各值生成方式
timestamp
Long timestamp = System.currentTimeMillis() / 1000;
nonceStr
String nonceStr = RandomStringUtils.randomAlphanumeric(16);
signature
public static String getSign(String jsapi_ticket, String noncestr, Long timestamp, String url)throws NoSuchAlgorithmException {String shaStr = "jsapi_ticket=" + jsapi_ticket + "&noncestr=" + noncestr + "×tamp=" + timestamp + "&url="+ url;MessageDigest mDigest = MessageDigest.getInstance("SHA1");byte[] result = mDigest.digest(shaStr.getBytes());StringBuffer signature = new StringBuffer();for (int i = 0; i < result.length; i++) {signature.append(Integer.toString((result[i] & 0xff) + 0x100, 16).substring(1));}return signature.toString();}
6. 微信参考文档
获取access_token https://mp./wiki?t=resource/res_main&id=mp1421140183
获取jsapi_ticket https://mp./wiki?t=resource/res_main&id=mp1421141115
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