微信js-sdk+JAVA实现“分享到朋友圈”和“发送给朋友”功能详解

主要为以下实现步骤：

1.绑定域名

先登录微信公众平台进入“公众号设置”的“功能设置”里填写“JS接口安全域名”。（特别提示不需要加上http或者https,吃过亏）

2.页面引入js文件

<script src="http://res.wx.qq.com/open/js/jweixin-1.0.0.js"></script>
   <script src="https://res.wx.qq.com/open/js/jweixin-1.0.0.js"></script>

3.通过config接口注入权限验证配置

wx.config({

debug: true, // 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: '', // 必填，公众号的唯一标识

  timestamp: , // 必填，生成签名的时间戳

  nonceStr: '', // 必填，生成签名的随机串

  signature: '',// 必填，签名，见附录1

  jsApiList: [] // 必填，需要使用的JS接口列表，所有JS接口列表见附录2

});

4.通过ready接口处理成功验证

  wx.ready(function(){

   //详细代码

});

5.通过error接口处理失败验证

wx.error(function(res){});

详细页面代码

<script>
//微信分享朋友圈
$(function(){
 /***用户点击分享到微信圈后加载接口接口*******/
  var url=window.location.href.split('#')[0];
   url = url.replace(/&/g, '%26');
  console.log("url:"+url);
  $.ajax({
    url: "<%=basePath%>/lottery/shareToFriend.action?url="+url,
    type: "POST",
    async:true,
    cache: false,
    dataType: "json",
    success: function(data){
      wx.config({
       debug: false,
       appId: 'wx2948dfef9ef421ee',
       timestamp:data.timeStamp,
       nonceStr:data.nonceStr,
       signature:data.signature,
       jsApiList: [
         'checkJsApi',
         'onMenuShareTimeline',
         'hideOptionMenu',
         'onMenuShareAppMessage'
       ]
     }); 

     wx.ready(function(){
       //wx.hideOptionMenu();/***隐藏分享菜单****/
       wx.checkJsApi({
       jsApiList: [
        'getLocation',
        'onMenuShareTimeline',
        'onMenuShareAppMessage'
       ],
       success: function (res) {
        //alert(res.errMsg);
       }
      }); 

      wx.onMenuShareAppMessage({
         title: '刮刮乐',
         desc: '刮刮乐开始啦',
         link: '<%=basePath%>/lottery/lottery.action?lottery.id=${lottery.id}',
         imgUrl: '<%=basePath%>/resources/qjc/img/start.png',
         trigger: function (res) {
          //alert('用户点击发送给朋友');
         },
         success: function (res) {
          alert('您已获得抽奖机会，赶紧去赢大奖吧～～');
          //分享之后增加游戏次数
          $.ajax({
            url: "<%=basePath%>/lottery/rewardPlayCount.action?openId=${openId}&lotteryId=${lottery.id}&shareType=friend",
            type: "POST",
            async:true,
            cache: false,
            dataType: "json",
            success: function(data){ 

            }
           });
         },
         cancel: function (res) {
          //alert('已取消');
         },
         fail: function (res) {
          alert(res.errMsg);
         }
        }); 

       // 2.2 监听“分享到朋友圈”按钮点击、自定义分享内容及分享结果接口
       wx.onMenuShareTimeline({
         title: '刮刮乐',
         desc: '刮刮乐开始啦',
         link: '<%=basePath%>/lottery/lottery.action?lottery.id=${lottery.id}',
         imgUrl: '<%=basePath%>/resources/qjc/img/start.png',
         trigger: function (res) {
          //alert('用户点击分享到朋友圈');
         },
         success: function (res) {
          alert('您已获得抽奖机会，赶紧去赢大奖吧～～');
          //分享之后增加游戏次数
          $.ajax({
            url: "<%=basePath%>/lottery/rewardPlayCount.action?openId=${openId}&lotteryId=${lottery.id}&shareType=friendCircle",
            type: "POST",
            async:true,
            cache: false,
            dataType: "json",
            success: function(data){ 

            }
           });
         },
         cancel: function (res) {
          //alert('已取消');
         },
         fail: function (res) {
          alert(res.errMsg);
         }
      }); 

      wx.error(function (res) {
          alert(res.errMsg);
        });
      });
    },
    error: function() {
      alert('ajax request failed!!!!');
      return;
    }
  });
 }); 

</script>

java后台action代码：

//微信分享
  public void shareToFriend(){
    HttpServletRequest request = ServletActionContext.getRequest();
    String timeStamp = Sha1Util.getTimeStamp();//时间戳
    String nonceStr = WxConfig.getUUID();//随机字符串，不长于32位
    String url=request.getParameter("url");
    String signature = WxConfig.getSignature("APPId", "APP_secret", url, timeStamp, nonceStr);
    request.setAttribute("timeStamp", timeStamp);
    request.setAttribute("nonceStr", nonceStr);
    request.setAttribute("url", url);
    request.setAttribute("signature", signature);
    WXjssdk result = new WXjssdk(timeStamp,nonceStr,signature,url);
    CommonUtil.returnMsg(ServletActionContext.getResponse(), new Gson().toJson(result));
  }

WxConfig.java代码

">//jsapi_ticket
  public final static String WEIXIN_JSAPI_TICKET_URL ="https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token=ACCESS_TOKEN&type=jsapi"; 

  //access_token
  public static String getAccessToken(String appId,String appSecret){
    String access_token;
    access_token = mapToken.get("accessToken");
    if(access_token==null){
      String url = HttpUtil.WEIXIN_HOST_API + "/cgi-bin/token?grant_type=client_credential&appid="+appId+"&secret="+appSecret;
      String menuJsonStr = HttpUtil.get(url);
      final Type type = new TypeToken<Map<String, Object>>() {}.getType();
      final Map<Object, Object> accessTokenInfo = new Gson().fromJson(menuJsonStr, type);
      try{
        access_token = accessTokenInfo.get("access_token").toString();
        Object expires_in = accessTokenInfo.get("expires_in");
        mapToken.put("accessToken", access_token);
        logger.info("access_token:"+access_token+";expires_in:"+expires_in);
      }catch (JSONException e) {
        access_token = null;
        e.printStackTrace();
        logger.error("errcode:{}:"+accessTokenInfo.get("errcode")+"errmsg:{}:"+accessTokenInfo.get("errmsg"));
      }
    }
    return access_token;
  } 

  //jsapi_ticket
  public static String getJsapiTicket(String accessToken){
    String ticket;
    ticket = mapTicket.get("ticket");
    if(ticket==null){
      String url = HttpUtil.WEIXIN_HOST_API + "/cgi-bin/ticket/getticket?access_token="+accessToken+"&type=jsapi";
      String menuJsonStr = HttpUtil.get(url);
      final Type type = new TypeToken<Map<String, Object>>() {}.getType();
      final Map<Object, Object> ticketInfo = new Gson().fromJson(menuJsonStr, type);
      try{
        ticket = ticketInfo.get("ticket").toString();
        String expires_in = ticketInfo.get("expires_in").toString();
        mapTicket.put("ticket", ticket);
        logger.info("jsapi_ticket:"+ticket+";expires_in:"+expires_in);
      }catch (JSONException e) {
        ticket = null;
        e.printStackTrace();
        logger.error("ticket errcode:{}:"+ticketInfo.get("errcode")+"errmsg:{}:"+ticketInfo.get("errmsg"));
      }
    }
    return ticket;
  } 

   //生成随机字符串UUID
  public static String getUUID(){
     String uuid = UUID.randomUUID().toString().trim().replaceAll("-", "");
     return uuid;
  }  

  //JS-SDK Signature
  public static String getSignature(String appId,String appSecret,String url,String timeStamp,String nonceStr){
    String accessToken = getAccessToken(appId,appSecret);
    String jsapi_ticket = getJsapiTicket(accessToken);
    logger.info("accessToken==="+accessToken);
    String signValue = "jsapi_ticket="+jsapi_ticket+"&noncestr="+nonceStr+"×tamp="+timeStamp+"&url="+url;
    logger.info("微信JS-SDK权限验证的签名串："+signValue);
    //这个签名.主要是给加载微信js使用.别和上面的搞混了.
    String signature = Sha1Util.getSha1((signValue));
    logger.info("微信JS-SDK权限验证的签名："+signature);
    return signature;
  }

另外项目用到的Sha1Util.java和MD5Util.java可以直接在平台下载。

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