var http=require('http');var cheerio=require('cheerio');//頁面獲取到的數據模塊var url='http://www.jcpeixun.com/lesson/1512/';function filterData(html){  /*所要獲取到的目標數組 　　 var courseData=[{    chapterTitle:"",    videosData:{      videoTitle:title,      videoId:id,      videoPrice:price    }  }] */  var $=cheerio.load(html);  var courseData=[];  var chapters=$(".list-collapse");  chapters.each(function(item){    var chapterTitle=$(this).find(".collapse-head").find("label").text();    var videos=$(this).find(".listview5").children("li");    var chaptersData={      chaptersTitle:chapterTitle,      videosData:[]    }    videos.each(function(item){      var videoTitle=$(this).find(".ml10").attr('data-lesson-name');      var videoId=$(this).find(".ml10").attr('data-lesson-id');      var vadeoPrice=$(this).find(".colblue").text();      chaptersData.videosData.push({        title:videoTitle,        id:videoId,        price:vadeoPrice      })    })    courseData.push(chaptersData)   })  return courseData}function printCourseInfo(courseData){  courseData.forEach(function(item){    console.log(item.chaptersTitle+'/n');    item.videosData.forEach(function(item){      console.log(item.title+'【'+item.id+'】'+item.price+'/n')    })  })}http.get(url,function(res){  html="";  res.on("data",function(data){    html+=data  })  res.on('end',function(){    var courseData=filterData(html);    printCourseInfo(courseData)  })})