public String cacheJsSDKTicket(String appid) throws IOException {
    Assert.hasLength(appid);
    String cachedTicket = spyMemcachedClient.get(WechatConst.Cache.CACHE_KEY + "TICKET");
    if (cachedTicket != null && !"".equals(cachedTicket)) {
        LOG.info("Ticket exists, return directly ...");
        return cachedTicket;
    }
    LOG.info("Ticket not exists, get from weixin ...");
    String accessToken = weChatApi.getAccessToken(appid);
    String ticket = weChatApi.getJsApiTicket(accessToken);
    // 7200秒过期
    int timeOut = 7200;
    spyMemcachedClient.safeSet(WechatConst.Cache.CACHE_KEY + "TICKET", timeOut, ticket);
    return ticket;
}
这里我将ticket全局缓存到memorycache中。

@Override
    public String signJsSDK(String ticket, String url, String timestamp, String nonceStr) throws NoSuchAlgorithmException {
    Map map = new HashMap();
    map.put("noncestr", nonceStr);
    map.put("jsapi_ticket", ticket);
    map.put("timestamp", timestamp);
    map.put("url", url);
    String[] ss = {"noncestr", "jsapi_ticket", "timestamp", "url"};
    Arrays.sort(ss);
    String signStr = "";
    for (String s : ss) {
        signStr += s + "=" + map.get(s) + "&";
    }
    signStr = signStr.substring(0, signStr.length() - 1);
    return new SHA1().getDigestOfString(signStr.getBytes());
}

public void getJsSdkInfo(CspServiceContext serviceContext) throws IOException, NoSuchAlgorithmException {
    MessageObject mo = serviceContext.getRequestData();
    String url = (String) mo.getValue("url");
    String appid = (String) mo.getValue("appid");
    String timestamp = Long.toString(System.currentTimeMillis() / 1000);
    String nonceStr = UUID.randomUUID().toString(); 
    // 缓存ticket
    String ticket = memoryCacheManager.cacheJsSDKTicket(appid);
    // 签名
    String sign = weChatApi.signJsSDK(ticket, url, timestamp, nonceStr); 
    Map resMap = new HashMap();
    resMap.put("appid", appid);
    resMap.put("ticket", ticket);
    resMap.put("sign", sign);
    resMap.put("nonceStr", nonceStr);
    resMap.put("timestamp", timestamp);

    Response resp = new Response(resMap);
    serviceContext.setResponseData(resp);
    serviceContext.setResult(Result.FAULT_RESULT);
}

function _wechatConfig(o) {
        wx.config({
            debug: debug, // 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: o.appid, // 必填，公众号的唯一标识
            timestamp: o.timestamp, // 必填，生成签名的时间戳
            nonceStr: o.nonceStr, // 必填，生成签名的随机串
            signature: o.sign,// 必填，签名，见附录1
            jsApiList: [
                ‘onMenuShareTimeline‘,
                ‘onMenuShareAppMessage‘
            ] // 必填，需要使用的JS接口列表，所有JS接口列表见附录2
        });
    }
 
    function _getWechatJsSdkInfo(callback) {
        var s = W.Storage.get(W.location.href + "_" + area);
            var appid =‘wx7e80e8f93543a5c8‘;
            ajaxJsonCall(‘/wechat/service/WeChat.getJsSdkInfo.json‘, {
                url: W.location.href.split(‘#‘)[0],
                appid: appid
            }, function (data) {
                if (data.rtnCode === "000000") {
                    var o = data.responseData;
                    W.Storage.set(W.location.href + "_" + area, o, jsSdkTimeout);
                    callback(o);
                } else {
                    W.Storage.remove(W.location.href + "_" + area);
                }
            }, false);
    }

_getWechatJsSdkInfo(_wechatConfig);

wx.checkJsApi({
    jsApiList: [
        ‘getLocation‘,
        ‘onMenuShareTimeline‘,
        ‘onMenuShareAppMessage‘
    ],
    success: function (res) {
        //alert(JSON.stringify(res));
    }
});
 
//var url = "www.zaichengdu.com" + app_path;
var url = curDomain;
function _shareAppMessage() {
    // 页面加载后设置微信分享给朋友的内容
    wx.onMenuShareAppMessage({
        title: ‘圣诞老人送礼啦，现金红包人人领！‘, // 分享标题
        desc: ‘“圣诞夺包”35000份礼包等你拆！‘, // 分享描述
        link: encodeURI(curDomain + ‘/christmas/service/ChristmasSockOnline.home.do?area=cd‘),//encodeURI(window.location.href.replace(‘&from=ad‘, ‘‘)), // 分享链接
        imgUrl: url + ‘/public/christmas/img/shorejoin.jpg‘, // 分享图标
        type: ‘‘, // 分享类型,music、video或link，不填默认为link
        dataUrl: ‘‘, // 如果type是music或video，则要提供数据链接，默认为空
        success: function () {
            // 用户确认分享后执行的回调函数
            //Message.toast.success("分享成功！").appear();
        },
        cancel: function () {
            // 用户取消分享后执行的回调函数
            //alert(‘cancel‘);
        }
    });
}
 
function _shareTimeline() {
    // 设置分享到朋友圈的内容
    wx.onMenuShareTimeline({
        title: ‘圣诞老人送礼啦，现金红包人人领！‘, // 分享标题
        link: encodeURI(curDomain + ‘/christmas/service/ChristmasSockOnline.home.do?area=cd‘),//encodeURI(window.location.href.replace(‘&from=ad‘, ‘‘)), // 分享链接
        imgUrl: url + ‘/public/christmas/img/shorejoin.jpg‘, // 分享图标
        success: function () {
            // 用户确认分享后执行的回调函数
            Message.toast.success("分享成功！").appear();
        },
        cancel: function () {
            // 用户取消分享后执行的回调函数
            //alert(‘cancel‘);
        }
    });
}
 
wx.ready(function () {
    // config信息验证后会执行ready方法，所有接口调用都必须在config接口获得结果之后，config是一个客户端的异步操作，所以如果需要在页面加载时就调用相关接口，则须把相关接口放在ready函数中调用来确保正确执行。对于用户触发时才调用的接口，则可以直接调用，不需要放在ready函数中。
    //alert(‘success‘);
    _shareAppMessage();
    _shareTimeline();
});
 
wx.error(function (res) {
    // config信息验证失败会执行error函数，如签名过期导致验证失败，具体错误信息可以打开config的debug模式查看，也可以在返回的res参数中查看，对于SPA可以在这里更新签名。
    //alert(‘error‘);
});