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=">
   <script src=">

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。