微信分享

为了增加用户的扩散速度,微信分享是绕不过的坎儿.

微信分享其实是挺简单,有现成的接口,只需要按部就班来搭建正确的调用方法就行.

分享分为app内部分享和在分享页面中使用微信自己的分享按钮(外部分享)两种.

1.内部分享,点击对应的分享按钮,代码实现如下:

	function shareOnclick(ths){
		jQuery('div.closeShare').addClass('display-n'); 
		var sharemsgjson={};
		var sharetype=$(ths).find("img").attr("sharetype");
		sharemsgjson.sharetype=sharetype;
		sharemsgjson.title='分享的标题';
		sharemsgjson.content='分享的内容';
		sharemsgjson.href='点击分享框的跳转链接';
		sharemsgjson.thumbs=['分享logo'];  
		shareAction(sharemsgjson); 
	}	
	function shareAction(sharemsgjson) {
		var msg = {};
		var sharetype = sharemsgjson.sharetype;
		var content = sharemsgjson.content;
		var title = sharemsgjson.title;
		var thumbs = sharemsgjson.thumbs;
		var href = sharemsgjson.href;
		if (sharetype == 'weixin') {
			msg = {
				extra: {
					scene: 'WXSceneSession'
				},
				content: content,
				title: title,
				thumbs: thumbs,
				href: href
			};
		} else if (sharetype == 'pengyouquan') {
			msg = {
				extra: {
					scene: 'WXSceneTimeline'
				},
				content: content,
				title: title,
				thumbs: thumbs,
				href: href
			};
			sharetype = 'weixin';
		} else if (sharetype == 'sinaweibo') { // 新浪微博
			msg = {
				content: content,
				title: title,
				thumbs: thumbs,
				href: href
			};
		}
		// 	朋友圈
		var share = shares[sharetype];
		if (share.authenticated) {
			share.send(msg, function() {
				mui.alert("分享到\"" + share.description + "\"成功！ ");
			}, function(e) {
				if(e.code=="-100"){
					mui.alert("未分享~");
				}else{
					mui.alert("分享到\"" + share.description + "\"失败: " + e.code + " - " + e.message);
				}
			});
		} else {
			share.authorize(function() {
				share.send(msg, function() {
					mui.alert("分享到\"" + share.description + "\"成功！ ");
				}, function(e) {
				});
			}, function(e) {
			});
		}
	}

2.分享页面二次分享:

首先需要引用微信js:<script language=javascript src='http://res.wx.qq.com/open/js/jweixin-1.0.0.js'></script>,如果服务器时https协议,需要引用https协议的该文件.

	wx.config({
	    debug: false, // 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1
	    jsApiList: ['onMenuShareAppMessage','onMenuShareTimeline'] // 必填，需要使用的JS接口列表，所有JS接口列表见附录2
	});
	wx.onMenuShareAppMessage({
		title: '', // 分享标题
		desc: '', // 分享描述
		link: share_link, // 分享链接
		imgUrl: firstimg, // 分享图标
		type: 'link', // 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 () { 
			console.log('好友分享成功');
		},
		cancel: function () { 
			console.log('好友分享取消');
		}
	});	
	// 分享到朋友圈
	wx.onMenuShareTimeline({
	    title: '', // 分享标题
		link: share_link, // 分享链接
		imgUrl: firstimg, // 分享图标
	    success: function () { 
	    	console.log('朋友圈分享成功');
	    },
	    cancel: function () { 
	    	console.log('朋友圈分享取消');
	    }
	});	


	wx.checkJsApi({
		jsApiList: ['onMenuShareAppMessage','onMenuShareTimeline'], // 需要检测的JS接口列表，所有JS接口列表见附录2,
		success: function(res) {
			// 以键值对的形式返回，可用的api值true，不可用为false
			// 如：{"checkResult":{"chooseImage":true},"errMsg":"checkJsApi:ok"}
			console.log('是否支持当前接口');
			console.log(res);
		}
	});
	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。
		console.log('失败。。');
		console.log(res);
	});

服务器端实现逻辑:

		ReturnDatas returnObject = ReturnDatas.getSuccessReturnDatas();
		String noncestr = SecUtils.getUUID();
		Long timestamp = new Date().getTime() ;
		timestamp = timestamp / 1000 ;// 转换为 s
		String curr_location = request.getParameter("curr_location");
		String paraid = request.getParameter("paraid");
		String paratype = request.getParameter("paratype");
		String url = "",para = "",result = "";
		String appid = "";// 测试appid
		String secret = "";//测试
		String METHOD = "POST";
		String encode = "UTF-8";		
		// 获取 access_token
		// 首先去数据库中查询最近一次请求的token是否在有效期,微信的有效期是2h,保险起见,本地设置为1h,避免每次都重新请求token,达到微信的2000/天 上限.
		boolean need_refresh_token = false ;
		String last_ticket = "";
		String ticket = "";
		数据字典 dd = new 数据字典();
		try {
			dd = dicDataService.findDicDataById("refreshaccesstoken");
		} catch (Exception e) {
			
		}
		if(dd != null && StringUtils.isNotBlank(dd.getPid())){
			String time_str = dd.getPid() ;
			try{
				long time = Long.parseLong(time_str) ;
				long curr_time = System.currentTimeMillis() ;
				if(curr_time - time > 3600000){ // 超过一个小时
					need_refresh_token = true ;
				}else{
					last_ticket = dd.getCode() ;
				}
			}catch(NumberFormatException e){
				need_refresh_token = true ;
			}
		}else{
			need_refresh_token = true ;
		}
		if(need_refresh_token){ // 去微信服务器刷新token和ticket
			url = " https://api.weixin.qq.com/cgi-bin/token";
			para = "grant_type=client_credential&appid="+appid+"&secret="+secret;
			try {
				result = HttpUtils.post(url, para, METHOD, encode);
			} catch (Exception e) {
				
			}
			String access_token_1 = "";
			if(StringUtils.isNotBlank(result)){
				HashMap<String, Object> map_result = JsonUtils.readValue(result, HashMap.class);
				access_token_1  = (String)map_result.get("access_token");
			}		
			// 根据获取的  access_token 来获取 ticket
			url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket"; 
			para = "access_token="+access_token_1+"&type=jsapi";
			try {
				result = HttpUtils.post(url, para, METHOD, encode);
			} catch (Exception e) {
				
			}
			Number expires_in = null;
			String errmsg = ""; 
			if(StringUtils.isNotBlank(result)){
				HashMap<String, Object> map_result = JsonUtils.readValue(result, HashMap.class);
				errmsg  = (String)map_result.get("errmsg");
				ticket  = (String)map_result.get("ticket");
				expires_in = (Number) map_result.get("expires_in");
			}
			
			// 更新数据库中的token和ticket
			if(StringUtils.isNotBlank(ticket) && StringUtils.isNotBlank(errmsg) && errmsg.equalsIgnoreCase("ok")){
				 dd.setRemarker(access_token_1);
				 String curr_time_str = System.currentTimeMillis()+"";
				 dd.setPid(curr_time_str);
				 dd.setCode(ticket);
				 if(expires_in != null ){
					 dd.setSort(expires_in.intValue());
				 }else{
					 dd.setSort(7200);
				 }
				 try{
					 dicDataService.update(dd);
				 }catch(Exception e){
					 
				 }
			}
		}else{
			ticket = last_ticket ;
		}
        HashMap<String, Object> ret = new HashMap<String, Object>();
        String string1;
        String signature = "";
        //注意这里参数名必须全部小写，且必须有序
        string1 = "jsapi_ticket=" + ticket +
                  "&noncestr=" + noncestr +
                  "×tamp=" + timestamp +
                  "&url=" + curr_location;
        System.out.println(string1);
        try
        {
            MessageDigest crypt = MessageDigest.getInstance("SHA-1");
            crypt.reset();
            crypt.update(string1.getBytes("UTF-8"));
            signature = byteToHex(crypt.digest());
            System.out.println("signature:"+signature);
            System.out.println("jsapi_ticket:"+ticket);
            System.out.println("noncestr:"+noncestr);
            System.out.println("timestamp:"+timestamp);
            System.out.println("curr_location:"+curr_location);
        }catch (NoSuchAlgorithmException e){
            e.printStackTrace();
        }catch (UnsupportedEncodingException e){
            e.printStackTrace();
        }
        // 获取分享logo图片路径
        String img_path = "";
        try {
			img_path = service.xxxx();
		} catch (Exception e) {
			
		}
        ret.put("firstimg", img_path);
        ret.put("url", curr_location);
        ret.put("jsapi_ticket", ticket);
        ret.put("nonceStr", noncestr);
        ret.put("timestamp", timestamp);
        ret.put("signature", signature);
        ret.put("appid", appid);
        returnObject.setData(ret);
		return returnObject ;

备注:如果不通过微信分享接口来定制实现二次分享样式,默认也是可以分享成功,只不过微信会默认抓取页面title作为分享title,抓取页面url作为分享内容,页面中的第一张图片作为默认logo(图片尺寸大小必需大于300x300).

以上.