主要为以下实现步骤：
1.绑定域名
先登录微信公众平台进入“公众号设置”的“功能设置”里填写“JS接口安全域名”。（特别提示不需要加上http或者https,吃过亏）
2.页面引入js文件
<script src="http://res.wx.qq.com/open/js/jweixin-1.0.0.js"></script>
<script src="https://res.wx.qq.com/open/js/jweixin-1.0.0.js"></script>
3.通过config接口注入权限验证配置
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: '', // 必填，公众号的唯一标识 timestamp: , // 必填，生成签名的时间戳 nonceStr: '', // 必填，生成签名的随机串 signature: '',// 必填，签名，见附录1 jsApiList: [] // 必填，需要使用的JS接口列表，所有JS接口列表见附录2});4.通过ready接口处理成功验证
wx.ready(function(){ //详细代码});5.通过error接口处理失败验证
wx.error(function(res){});详细页面代码
<script> //微信分享朋友圈 $(function(){ /***用户点击分享到微信圈后加载接口接口*******/ var url=window.location.href.split('#')[0]; url = url.replace(/&/g, '%26'); console.log("url:"+url); $.ajax({ url: "<%=basePath%>/lottery/shareToFriend.action?url="+url, type: "POST", async:true, cache: false, dataType: "json", success: function(data){ wx.config({ debug: false, appId: 'wx2948dfef9ef421ee', timestamp:data.timeStamp, nonceStr:data.nonceStr, signature:data.signature, jsApiList: [ 'checkJsApi', 'onMenuShareTimeline', 'hideOptionMenu', 'onMenuShareAppMessage' ] }); wx.ready(function(){ //wx.hideOptionMenu();/***隐藏分享菜单****/ wx.checkJsApi({ jsApiList: [ 'getLocation', 'onMenuShareTimeline', 'onMenuShareAppMessage' ], success: function (res) { //alert(res.errMsg); } }); wx.onMenuShareAppMessage({ title: '刮刮乐', desc: '刮刮乐开始啦', link: '<%=basePath%>/lottery/lottery.action?lottery.id=${lottery.id}', imgUrl: '<%=basePath%>/resources/qjc/img/start.png', trigger: function (res) { //alert('用户点击发送给朋友'); }, success: function (res) { alert('您已获得抽奖机会，赶紧去赢大奖吧～～'); //分享之后增加游戏次数 $.ajax({ url: "<%=basePath%>/lottery/rewardPlayCount.action?openId=${openId}&lotteryId=${lottery.id}&shareType=friend", type: "POST", async:true, cache: false, dataType: "json", success: function(data){ } }); }, cancel: function (res) { //alert('已取消'); }, fail: function (res) { alert(res.errMsg); } }); // 2.2 监听“分享到朋友圈”按钮点击、自定义分享内容及分享结果接口 wx.onMenuShareTimeline({ title: '刮刮乐', desc: '刮刮乐开始啦', link: '<%=basePath%>/lottery/lottery.action?lottery.id=${lottery.id}', imgUrl: '<%=basePath%>/resources/qjc/img/start.png', trigger: function (res) { //alert('用户点击分享到朋友圈'); }, success: function (res) { alert('您已获得抽奖机会，赶紧去赢大奖吧～～'); //分享之后增加游戏次数 $.ajax({ url: "<%=basePath%>/lottery/rewardPlayCount.action?openId=${openId}&lotteryId=${lottery.id}&shareType=friendCircle", type: "POST", async:true, cache: false, dataType: "json", success: function(data){ } }); }, cancel: function (res) { //alert('已取消'); }, fail: function (res) { alert(res.errMsg); } }); wx.error(function (res) { alert(res.errMsg); }); }); }, error: function() { alert('ajax request failed!!!!'); return; } }); }); </script> java后台action代码：
//微信分享 public void shareToFriend(){ HttpServletRequest request = ServletActionContext.getRequest(); String timeStamp = Sha1Util.getTimeStamp();//时间戳 String nonceStr = WxConfig.getUUID();//随机字符串，不长于32位 String url=request.getParameter("url"); String signature = WxConfig.getSignature("APPId", "APP_secret", url, timeStamp, nonceStr); request.setAttribute("timeStamp", timeStamp); request.setAttribute("nonceStr", nonceStr); request.setAttribute("url", url); request.setAttribute("signature", signature); WXjssdk result = new WXjssdk(timeStamp,nonceStr,signature,url); CommonUtil.returnMsg(ServletActionContext.getResponse(), new Gson().toJson(result)); } WxConfig.java代码
">//jsapi_ticket public final static String WEIXIN_JSAPI_TICKET_URL ="https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token=ACCESS_TOKEN&type=jsapi"; //access_token public static String getAccessToken(String appId,String appSecret){ String access_token; access_token = mapToken.get("accessToken"); if(access_token==null){ String url = HttpUtil.WEIXIN_HOST_API + "/cgi-bin/token?grant_type=client_credential&appid="+appId+"&secret="+appSecret; String menuJsonStr = HttpUtil.get(url); final Type type = new TypeToken<Map<String, Object>>() {}.getType(); final Map<Object, Object> accessTokenInfo = new Gson().fromJson(menuJsonStr, type); try{ access_token = accessTokenInfo.get("access_token").toString(); Object expires_in = accessTokenInfo.get("expires_in"); mapToken.put("accessToken", access_token); logger.info("access_token:"+access_token+";expires_in:"+expires_in); }catch (JSONException e) { access_token = null; e.printStackTrace(); logger.error("errcode:{}:"+accessTokenInfo.get("errcode")+"errmsg:{}:"+accessTokenInfo.get("errmsg")); } } return access_token; } //jsapi_ticket public static String getJsapiTicket(String accessToken){ String ticket; ticket = mapTicket.get("ticket"); if(ticket==null){ String url = HttpUtil.WEIXIN_HOST_API + "/cgi-bin/ticket/getticket?access_token="+accessToken+"&type=jsapi"; String menuJsonStr = HttpUtil.get(url); final Type type = new TypeToken<Map<String, Object>>() {}.getType(); final Map<Object, Object> ticketInfo = new Gson().fromJson(menuJsonStr, type); try{ ticket = ticketInfo.get("ticket").toString(); String expires_in = ticketInfo.get("expires_in").toString(); mapTicket.put("ticket", ticket); logger.info("jsapi_ticket:"+ticket+";expires_in:"+expires_in); }catch (JSONException e) { ticket = null; e.printStackTrace(); logger.error("ticket errcode:{}:"+ticketInfo.get("errcode")+"errmsg:{}:"+ticketInfo.get("errmsg")); } } return ticket; } //生成随机字符串UUID public static String getUUID(){ String uuid = UUID.randomUUID().toString().trim().replaceAll("-", ""); return uuid; } //JS-SDK Signature public static String getSignature(String appId,String appSecret,String url,String timeStamp,String nonceStr){ String accessToken = getAccessToken(appId,appSecret); String jsapi_ticket = getJsapiTicket(accessToken); logger.info("accessToken==="+accessToken); String signValue = "jsapi_ticket="+jsapi_ticket+"&noncestr="+nonceStr+"×tamp="+timeStamp+"&url="+url; logger.info("微信JS-SDK权限验证的签名串："+signValue); //这个签名.主要是给加载微信js使用.别和上面的搞混了. String signature = Sha1Util.getSha1((signValue)); logger.info("微信JS-SDK权限验证的签名："+signature); return signature; } 另外项目用到的Sha1Util.java和MD5Util.java可以直接在平台下载。