微信JS-SDK 微信分享接口开发(实用版)

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上篇文章  微信JS-SDK 微信分享接口开发(介绍版)    初步介绍了微信分享的流程以及通过前端js快速的模拟出实际效果,但很遗憾以上介绍并不适用于实战,因此本文将重点介绍用Java开发的微信分享功能,并用于实战。

本次功能开发将介绍版中的js代码转为实际的java代码,分为两部分:

1.后台通过java代码请求微信接口获取access-token参数,以此access-token参数再次请求微信接口获取jsapi-ticket,并将获取的jsapi-ticket进行加密、校验与其他的参数封装成json格式的数据传送到前台JS页面

2.前台获取json数据后,并提供给参数给微信分享接口调用,具体接口为js.confige,js.ready;

   获取微信分享页面的标题和描述,以及分享地址、缩略图地址

首先看看前台代码:

jq.wxShare.js 主要供微信分享接口调用:

// 微信分享默认调用接口

 var $wx_account = wxdata.wx_account,
 $wx_share = wxdata.wx_share;

//配置微信信息
wx.config ({
    debug : false,
    appId : $wx_account[0],
    timestamp : $wx_account[1],
    nonceStr : $wx_account[2],
    signature : $wx_account[3],
    jsApiList : [
        // 所有要调用的 API 都要加到这个列表中
        'onMenuShareTimeline',
        'onMenuShareAppMessage',
        'onMenuShareQQ',
        'onMenuShareWeibo'
    ]
});
wx.ready (function () {
    // 微信分享的数据
    var shareData = {
        "imgUrl" : $wx_share[0],
        "link" : $wx_share[1],
        "desc" : $wx_share[2],
        "title" : $wx_share[3],
        success : function () {  
			// 分享成功可以做相应的数据处理
        }
    };
    wx.onMenuShareTimeline (shareData);
    wx.onMenuShareAppMessage (shareData);
    wx.onMenuShareQQ (shareData);
    wx.onMenuShareWeibo (shareData);
});


jq.wxShare_data.js 提供微信分享接口所用的参数数据

// 提供微信分享接口所需的参数
var wxdata = {
	wx_account : new Array(4),
	wx_share : new Array(4),
	
	get_wxshare_data : function(ctx){
		var url = ctx + "/weixinShareAction.do?method=getWxShareData";
		$.ajax({
			type : "GET",
			url : url,
			dataType : "json",
			cache : false,
			async : false,
			success : function(msg) { 
				if(msg.errcode == 0){
					wxdata.wx_account[0] = msg.wxuser;  // appid
					wxdata.wx_account[1] = msg.timestamp;   // timestamp
					wxdata.wx_account[2] = msg.noncestr; // noncestr
					wxdata.wx_account[3] = msg.signature;  // signature

					wxdata.wx_share[0] = msg.shareimg;  // share_img 分享缩略图图片
					wxdata.wx_share[1] = msg.shareurl;// share_link  分享页面的url地址,如果地址无效,则分享失败
					
					var description = $("meta[name='description']").attr("content");
					if ($.trim(description) != "") {
						wxdata.wx_share[2] = $.trim(description); // share_desc
					}
					var title1 = document.title;
					if ($.trim(title1) != "") {
						wxdata.wx_share[3] = title1;// share_title
					}
				}
			},
			error : function(msg){
				
			}
		});
	}
	
}

var host = "http://" + window.location.host;
wxdata.get_wxshare_data(host);


后台代码 WeiXinShareAction.java

	// 微信分享入口
	public void getWxShareData() throws Exception {
		JsonObject jsonObject = new JsonObject();
		
		String ticket = null;
		String[] wxInfo = new String[]{"appId","appsecret"};
		
		String ticketResString = this.getShareJsapiTicket(wxInfo);
		
		if (StringUtils.isNotEmpty(ticketResString)) {
			JSONObject ticketJSONObject = JSONObject.fromObject(ticketResString);
			if (ticketJSONObject.getInt("errcode") == 0) {
				ticket = JSONObject.fromObject(ticketResString).optString("ticket", "");
			}
		}
		
		if (StringUtils.isEmpty(ticket)) {
			jsonObject.addProperty("errcode", 10002);
			jsonObject.addProperty("errmsg", "ticket_error");
			this.responseWrite(jsonObject.toString());
			return;
		}
		
		String noncestr = this.createNonceStr();
		int timestamp = this.createTimestamp();
		String requestRefererURL = this.getRequest().getHeader("referer");
		logger.warn("requestRefererURL: " + requestRefererURL);
		
		String signature = this.createSignature(noncestr, ticket, timestamp, requestRefererURL);
		
		jsonObject.addProperty("errcode", 0);
		jsonObject.addProperty("errmsg", "");
		jsonObject.addProperty("wxuser", wxInfo[0]); // appId
		jsonObject.addProperty("timestamp", timestamp);
		jsonObject.addProperty("noncestr", noncestr);
		jsonObject.addProperty("signature", signature);
		jsonObject.addProperty("shareimg", "http://www.abc.com/123.jpg");
		jsonObject.addProperty("shareurl", "http://www.abc.com/123.html");
		this.responseWrite(jsonObject.toString());
	}

	/**
	 * 微信分享,获取JsapiTicket
	 */
	private String getShareJsapiTicket(String[] wxInfo) throws Exception {
		String siteId = "mywebSite";
		
		String jsapiTicket = remoteMemcachedClient.get(siteId + "_jsapiTicket");
		if (StringUtils.isNotEmpty(jsapiTicket)) {
			this.logger.warn(siteId + " from memcached jsapiTicket: " + jsapiTicket);
			return jsapiTicket;
		}
		
		String accessToken = this.getWeiXinAccessToken(wxInfo);
		if (StringUtils.isEmpty(accessToken)) { // 获取 accessToken 失败
			this.logger.warn(siteId + " accessToken is empty.");
			JsonObject jsonObject = new JsonObject();
			jsonObject.addProperty("errcode", "10000");
			jsonObject.addProperty("errmsg", "access_error");
			return jsonObject.toString();
		}
		
		String url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token="
				+ accessToken + "&type=jsapi";
		jsapiTicket = this.httpReqExecute(url);
		this.logger.warn(siteId + " from weixin api jsapiTicket is: " + jsapiTicket);
		
		if(StringUtils.isNotEmpty(jsapiTicket)) {
			// 向memcached里写内容,第二个参数为过期时间,单位为:秒
			remoteMemcachedClient.set(siteId + "_jsapiTicket", 1 * 60 * 90, jsapiTicket);
			return jsapiTicket;
		}
		return null;
	}


	/**
	 * 微信分享,获取access_token
	 */
	private String getWeiXinAccessToken(String[] wxInfo) throws Exception {
		String url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid="
				+ wxInfo[0] + "&secret=" + wxInfo[1];
		
		String result = this.httpReqExecute(url);
		this.logger.warn("from weixin api accessToken: " + result);

		try {
			if(StringUtils.isNotEmpty(result)) {
				// 解析respContent,并获取其中的更新的key,
				String accessToken = JSONObject.fromObject(result).optString("access_token", "");
				return accessToken;
			}
		} catch (Exception e) {
			logger.error("getAccessToken error in WeiXinShareAction", e);
		}
		return null;
	}

组装数据方法

	// 数据签名 
	private String createSignature(String nocestr, String ticket, int timestamp, String url) {
		// 这里参数的顺序要按照 key 值 ASCII 码升序排序
		String s = "jsapi_ticket=" + ticket + "&noncestr=" + nocestr 
				+ "×tamp=" + timestamp + "&url=" + url;
		return DigestUtils.shaHex(s);
	}

	// 创建随机串 自定义个数0 < ? < 32 
	private String createNonceStr() {
		String str = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
		String nonceStr = "";
        for (int i = 0; i < 16; i++) {
        	int beginIndex = (int) Math.round(Math.random() * 10);
            nonceStr += str.substring(beginIndex, beginIndex + 1);
        }
        return nonceStr;
    }
	
	// 创建时间戳
	private int createTimestamp() {
        return Calendar.getInstance().get(Calendar.SECOND);
    }

http请求接口

	// HTTP远程调用
	private String httpReqExecute(String url) {
		String result = "";
		DefaultHttpClient httpclient = null ;
		try {
			httpclient = new DefaultHttpClient();
			HttpPost httppost = new HttpPost(url);
			// 执行  
			org.apache.http.HttpResponse response = httpclient.execute(httppost);  
			HttpEntity entity = response.getEntity(); 
			if(entity != null && response.getStatusLine().getStatusCode() == 200){
				result =  EntityUtils.toString(entity, "UTF-8");
			}
		} catch (Exception e) {
			logger.error(" WeiXinShareAction 调用微信 API 失败!", e);
		} finally { // 关闭连接,释放资源
			httpclient.getConnectionManager().shutdown();
		}
		return result;
	}
输出帮助信息

	// 输出信息
	private void responseWrite(String content) {
		try {
			getResponse().setCharacterEncoding("utf-8");
			getResponse().getWriter().write(content);
		} catch (Exception e) {
			logger.error("responseWrite error in WeiXinShareAction", e);
		}
	}


详细代码见  实用版代码下载

注意:由于所有的js代码最后压缩为core.min.js文件,因此必须在分享页面中添加js文件 <script src="http://res.wx.qq.com/open/js/jweixin-1.0.0.js"></script>,且该core.min.js文件必须在分享页面中加载,否则分享失败,


参见微信JS-SDK微信分享接口开发介绍版




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转载自blog.csdn.net/u013713832/article/details/73649750