微信js sdk分享开发摘记java版

 1  public  void share(HttpServletRequest request) throws Exception {
 2             
 3             StringBuffer homeUrl = request.getRequestURL();
 4             String queryString =request.getQueryString();
 5             if(StringUtils.isNotBlank(queryString)){
 6                 homeUrl.append("?").append(queryString);
 7             }

 8             long timestamp = System.currentTimeMillis() / 1000;
 9             
10             String nonceStr = UUID.randomUUID().toString();
11           
12             String signature = SignUtil.getSignature(
13                     weiXinBaseService.getJsTicket(), nonceStr, timestamp,
14                     homeUrl.toString());
15             logger.info("url="+homeUrl);
16             logger.info("nonceStr=" + nonceStr);
17             logger.info("timestamp=" + timestamp);
18             logger.info("signature=" + signature);
19             logger.info("appid=" + WebConfig.get("weixin.appid"));
20             request.setAttribute("appid",  WebConfig.get("weixin.appid"));
21             request.setAttribute("timestamp", timestamp);
22             request.setAttribute("nonceStr", nonceStr);
23             request.setAttribute("signature", signature);
24         }

/**
     * 获得分享链接的签名。
     * @param ticket
     * @param nonceStr
     * @param timeStamp
     * @param url
     * @return
     * @throws Exception
     */
    public static String getSignature(String ticket, String nonceStr, long timeStamp, String url) throws Exception {
        String sKey = "jsapi_ticket=" + ticket
                + "&noncestr=" + nonceStr + "&timestamp=" + timeStamp
                + "&url=" + url;
        return getSignature(sKey);
    }

 /**
     * 验证签名。
     * 
     * @param signature
     * @param timestamp
     * @param nonce
     * @return
     */
    public static String getSignature(String sKey) throws Exception {
        String ciphertext = null;
        MessageDigest md = MessageDigest.getInstance("SHA-1");
        byte[] digest = md.digest(sKey.toString().getBytes());
        ciphertext = byteToStr(digest);
        return ciphertext.toLowerCase();
    }

 /** 
     * 将字节数组转换为十六进制字符串 
     *  
     * @param byteArray 
     * @return 
     */  
    private static String byteToStr(byte[] byteArray) {  
        String strDigest = "";  
        for (int i = 0; i < byteArray.length; i++) {  
            strDigest += byteToHexStr(byteArray[i]);  
        }  
        return strDigest;  
    }  

  /** 
     * 将字节转换为十六进制字符串 
     *  
     * @param mByte 
     * @return 
     */  
    private static String byteToHexStr(byte mByte) {  
        char[] Digit = { ‘0‘, ‘1‘, ‘2‘, ‘3‘, ‘4‘, ‘5‘, ‘6‘, ‘7‘, ‘8‘, ‘9‘, ‘A‘, ‘B‘, ‘C‘, ‘D‘, ‘E‘, ‘F‘ };  
        char[] tempArr = new char[2];  
        tempArr[0] = Digit[(mByte >>> 4) & 0X0F];  
        tempArr[1] = Digit[mByte & 0X0F];  
  
        String s = new String(tempArr);  
        return s;  
    }  

<script type="text/javascript" src="${pageContext.request.contextPath}/static/js/jweixin-1.0.0.js"></script>

<script>
  var shareTitle = "法国游已经近在咫尺了，是朋友就帮我一把吧！";
    var shareImg = "http://" + domain +"${pageContext.request.contextPath}/static/img/shareImage.jpg"
    wx.config({
        debug: false, //
        appId: ‘${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1
        jsApiList: [
            ‘onMenuShareTimeline‘,
            ‘onMenuShareAppMessage‘,
            ‘showOptionMenu‘
        ] // 必填，需要使用的JS接口列表，所有JS接口列表见附录2
        
    });

    wx.ready(function () {    
       share();
        });
    function share(){
        wx.showOptionMenu();
        wx.onMenuShareTimeline({
            title: shareTitle, // 分享标题
            link: $("#shareLink").val(), // 分享链接
            imgUrl:shareImg,
            success: function () {
                
            }
        });
        wx.onMenuShareAppMessage({
            title: shareTitle, // 分享标题
            link: $("#shareLink").val(), // 分享链接
            imgUrl:shareImg,
            desc: ‘xxx‘, // 分享描述
            success: function () {
                
            }
        });
    }

</script>