微信公众号的分享

分享的东西页面做的比较多，后台需要去取微信的Access_token  和JsApiTicket  然后再验签

public class WeixinShare {
    
    private static Map<String,KeyValue> map=new HashMap<String,KeyValue>();
    private static Map<String,String> urlMap=new HashMap<String,String>();
    
    static {
        urlMap.put("http://weixin8020/OhdWeixin/personal/integration.jsp", "http://www.。。。.com/OhdWeixin/UserAction!userSign.action");
        urlMap.put("http://www.。。。.com/OhdWeixin/personal/integration.jsp", "http://www.。。。.com/OhdWeixin/UserAction!userSign.action");
        urlMap.put("http://www.。。。.com/OhdWeixin/personal/personal.jsp", "http://www.。。。.com/OhdWeixin/UserAction!listUser.action");
        urlMap.put("http://weixin8020/OhdWeixin/personal/personal.jsp", "http://www.oohdear.com/OhdWeixin/UserAction!listUser.action");

//这里可能只需要http://weixin8020开头的的自己网址的链接，因为当初我认为这个没有用 只加的自己的官网的链接地址 ，但是不对 url没有得到
    }

    private WeixinShare() {
    }
    
    /**
     * 获取接口访问凭证，凭证有效时间为7200秒
     * @param appid 凭证
     * @param appsecret 密钥
     * @return
     */
    private static String getAccess_token(String appid, String appsecret) throws Exception {
        if(map.get("access_token")==null || DateTool.getDistanceMinute(map.get("access_token").getDate(), new Date())>=120) {
            String token_url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=APPID&secret=APPSECRET";
            String requestUrl = token_url.replace("APPID", appid).replace("APPSECRET", appsecret);
            JSONObject jsonObject = CommonUtil.httpsRequest(requestUrl,"GET",null);
            if (null != jsonObject) {
                try {
                    KeyValue keyValue=new KeyValue(jsonObject.getString("access_token"),new Date());
                    map.put("access_token", keyValue);
                }
                catch(JSONException err) {
                    err.printStackTrace();
                }
            }
        }
        return map.get("access_token").getValue();
    }
    
    /**
     * 调用微信JS接口的临时票据，凭证有效时间为7200秒
     * @param access_token 接口访问凭证
     * @return
     */
    private static String getJsApiTicket(String access_token) throws Exception {
        if(map.get("ticket")==null || DateTool.getDistanceMinute(map.get("ticket").getDate(), new Date())>=120) {
            String url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token=ACCESS_TOKEN&type=jsapi";
            String requestUrl = url.replace("ACCESS_TOKEN", access_token);
            JSONObject jsonObject = CommonUtil.httpsRequest(requestUrl,"GET",null);
            if (null != jsonObject) {
                try {
                    KeyValue keyValue=new KeyValue(jsonObject.getString("ticket"),new Date());
                    map.put("ticket", keyValue);
                }
                catch(JSONException err) {
                    err.printStackTrace();
                }
            }
        }
        return map.get("ticket").getValue();
    }
        
    private static String byteToHex(final byte[] hash) {
        Formatter formatter = new Formatter();
        for (byte b : hash) {
            formatter.format("%02x", b);
        }
        String result = formatter.toString();
        formatter.close();
        return result;
    }
 
    private static String create_nonce_str() {
        return UUID.randomUUID().toString();
    }
 
    private static String create_timestamp() {
        return Long.toString(System.currentTimeMillis()/1000);
    }
    
    private static String getUrl(){
        HttpServletRequest request = ServletActionContext.getRequest();
        StringBuffer requestUrl = request.getRequestURL();
        String queryString = request.getQueryString();
        String url = requestUrl.toString();
        url=urlMap.get(url);
        if(queryString!=null) url=url+"?"+queryString;
        return url;
    }
    
    private static Map<String, String> sign(String jsapi_ticket, String url) {
        Map<String, String> ret = new HashMap<String, String>();
        String nonce_str = create_nonce_str();
        String timestamp = create_timestamp();
        String str;
        String signature = "";
         //注意这里参数名必须全部小写，且必须有序
        str = "jsapi_ticket=" + jsapi_ticket +
                  "&noncestr=" + nonce_str +
                  "&timestamp=" + timestamp +
                  "&url=" + url;
        try {
            MessageDigest crypt = MessageDigest.getInstance("SHA-1");
            crypt.reset();
            crypt.update(str.getBytes("UTF-8"));
            signature = byteToHex(crypt.digest());
        }
        catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }
        catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        ret.put("url", url);
        ret.put("jsapi_ticket", jsapi_ticket);
        ret.put("nonceStr", nonce_str);
        ret.put("timestamp", timestamp);
        ret.put("signature", signature);
        return ret;
    }
    
    /**
     *
     * @param appId   公账号appId
     * @param appSecret
     * @param url    当前网页的URL，不包含#及其后面部分
     * @return
     */
    public static JSONObject getParam() throws Exception {
        String jsapi_ticket=getJsApiTicket(getAccess_token(CommonUtil.appId,CommonUtil.appSecret));
        String url = getUrl();
        Map<String, String> params = sign(jsapi_ticket, url);
        params.put("appid", CommonUtil.appId);
        JSONObject jsonObject = JSONObject.fromObject(params);  
        return jsonObject;
    }
    
    public static void main(String args[]) throws Exception {
        String appId="";
        String appsecret="";
        
        System.out.println("getAccess_token:"+getAccess_token(appId,appsecret));
        System.out.println("getJsApiTicket:"+getJsApiTicket(getAccess_token(appId,appsecret)));
    }
    
    private static class KeyValue {
        
        private String value=null;
        private Date date=null;
        
        public KeyValue(String value,Date date) {
            this.value=value;
            this.date=date;
        }

        public String getValue() {
            return value;
        }

        public Date getDate() {
            return date;
        }
    }

前台jsp需要做的是：  调用WeixinShare.getParam();

<head>
    <title></title>
    <meta content="initial-scale=1.0,user-scalable=no,maximum-scale=1,width=device-width" name="viewport">
    <meta content="yes" name="apple-mobile-web-app-capable">
    <meta content="black" name="apple-mobile-web-app-status-bar-style">
    <meta content="telephone=no" name="format-detection">
    <script type="text/javascript" src="<%=request.getContextPath()%>/js/jquery-1.7.1.min.js"></script>
    <script type="text/javascript" src="<%=request.getContextPath()%>/js/alertPopShow.js"></script>
    <script type="text/javascript" src="<%=request.getContextPath()%>/js/setFont.js"></script>
    <link rel="stylesheet" href="<%=request.getContextPath()%>/css/alert.css">
    <link rel="stylesheet" href="<%=request.getContextPath()%>/css/reset.css">
    <link href="<%=request.getContextPath()%>/css/integration.css" rel="stylesheet">
    <%
    JSONObject jsonObject=WeixinShare.getParam();
    String openid=(String)session.getAttribute("openid");
    %>
    <script src="<%=request.getContextPath()%>/js/jweixin-1.2.0.js"></script>
    <script>
    wx.config({
        debug:false,
        appId:'<%=jsonObject.getString("appid")%>',
        timestamp:'<%=jsonObject.getString("timestamp")%>',       
        nonceStr:'<%=jsonObject.getString("nonceStr")%>',
        signature:'<%=jsonObject.getString("signature")%>',
        jsApiList:[
            'checkJsApi',
            'onMenuShareTimeline',
            'onMenuShareAppMessage'
        ]
    });
    wx.ready(function () {
        //分享朋友圈
        wx.onMenuShareTimeline({
           title:'分享得积分',
           link:'http://www.。。。.com/OhdWeixin/invitation.jsp?recommender=${bindWxUser.mobile}',
           imgUrl:'http://www.。。。.com/OhdWeixin/images/pheader.png',
           success: function () {
            // 用户确认分享后执行的回调函数
           }
        });
        //分享给朋友
        wx.onMenuShareAppMessage({
            title:'快快去分享给你的朋友吧可以得积分哦！！',
            desc:'开业大吉',
            link:'http://www.。。。.com/OhdWeixin/invitation.jsp?recommender=${bindWxUser.mobile}',
            imgUrl:'http://www.。。。.com/OhdWeixin/images/pheader.png',
            type:'',
            dataUrl:'',
            success: function () {
                // 用户确认分享后执行的回调函数
            }
        });
    });
    wx.error(function (res) {
        alert(res.errMsg);  //打印错误消息。及把 debug:false,设置为debug:ture就可以直接在网页上看到弹出的错误提示
    });
    </script>