js实现百度地图同时显示多个路书效果

<script type="text/javascript" src="http://api.map.baidu.com/api?v=2.0&ak=自己的ak"></script>
<script type="text/javascript" src="js/lushu.js"></script><!--路书 -->

var BMapLib = window.BMapLib = BMapLib || {};
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})();

function showallrecord(starttime,endtime){//显示多条开始结束时间之间的自行车路书
  var bikeId=null;
  $.getJSON("./GetBickIdServlet",function(json){
    bikeId = json;//所有自行车编号
  });
  var json={
      "StartTime":starttime,//开始时间
      "EndTime":endtime//结束时间
  };
  //创建二维数组，例如pointArray[i]中i自行车编号，pointArray[i][j]为编号为i的自行车的所有借还站点信息
  $.getJSON("./GetAllRecordServlet",{json:JSON.stringify(json)},function(json){
    var j = 0;
    var stationlonlist=new Array();
    var stationlatlist=new Array();
    var pointArray=new Array();
    var bikeIdlist = new Array();
    for(var i = 0; i < bikeId.length; i++){
      stationlonlist[i] = new Array();
      stationlatlist[i] = new Array();
      pointArray[i] = new Array();
      bikeIdlist[i] = bikeId[i].BikeId;
    }
    var tt = json.length < 200?json.length:200;//如果查询出来的自行车借还站点记录多于200条，则显示200条。（待完善）
    for (var row = 0; row < pointArray.length; row++) {
      while (j < tt) {
        var k = j;
        var p = 0;
        var stationlon = parseFloat(json[j].Stationlon);// String类型转换成float类型
        stationlonlist[row][p]=stationlon;// 将stationlon放到stationlonlist里
        var stationlat = parseFloat(json[j].Stationlat);
        stationlatlist[row][p]=stationlat;// 将stationlat放到stationlatlist里
        pointArray[row][p] = new BMap.Point(stationlon,stationlat);
        while (bikeIdlist[row] == json[k + 1].BikeId) {
          k++;
          p++;
          stationlon= parseFloat(json[k].Stationlon);// String类型转换成float类型
          stationlonlist[row][p]=stationlon;// 将stationlon放到stationlonlist里
          stationlat= parseFloat(json[k].Stationlat);
          stationlatlist[row][p] =stationlat;// 将stationlat放到stationlatlist里
          pointArray[row][p] = new BMap.Point(stationlon, stationlat);
        }
        addMarkertest(pointArray,row);//添加标记点
        j = k + 1;
        break;
      }
      var bikespeedtest = speedtest(pointArray,row);//每辆自行车路书的速度
      polylinetest(pointArray,row,stationlonlist,stationlatlist);//每辆自行车借还站点间画折线
      lushutest(pointArray,bikespeedtest,row,stationlonlist,stationlatlist);//每辆自行车借还站点的路书路径
    }
    map.setViewport(pointArray);
  });
}

function speedtest(pointArray,row){//根据自行车的借还时间差来显示不同的路书速度（待完善）
  var distance = 0;//直行车走过的路径长度
  for(var i = 0; i < pointArray[row].length-1; i++){
    distance += (map.getDistance(pointArray[row][i],pointArray[row][i+1]));//自行车借还站点的路径长度
  }
  return distance/20;//速度=路径长度/时间（此处时间固定，可改为根据数据库读取的时间）
}

//
function polylinetest(pointArray,row,stationlonlist,stationlatlist){
  var points = new Array();
  for(var i = 0; i < pointArray[row].length; i++){
    points[i] = new BMap.Point(parseFloat(stationlonlist[row][i]), parseFloat(stationlatlist[row][i]));
  }
  //增加点与点之间的连线
  var polyline = new BMap.Polyline(points, {
    strokeColor : getColor(),
    strokeWeight : 2,
    strokeOpacity : 0.5
  }); // 创建折线
  map.addOverlay(polyline); // 绘制折线
}

//
function lushutest(pointArray,bikespeedtest,row,stationlonlist,stationlatlist){
  var points = new Array();
  for(var i = 0; i < pointArray[row].length; i++){
    points[i] = new BMap.Point(parseFloat(stationlonlist[row][i]), parseFloat(stationlatlist[row][i]));
  }
  var lushu = new BMapLib.LuShu(map, points, {
    defaultContent : "",
    autoView : true, // 是否开启自动视野调整，如果开启那么路书在运动过程中会根据视野自动调整
    icon : new BMap.Icon('photo/bike.png', new BMap.Size(22, 22), {
      anchor : new BMap.Size(10, 25)
    }),
    // enableRotation: true, //是否设置marker随着道路的走向进行旋转
    speed : bikespeedtest,
  });  
  lushu.start();
}

//生成折线的随机颜色
function sj16(){
  var sjshu=Math.round(Math.random()*10*2);
  do
  {
    sjshu=Math.round(Math.random()*10*2);
  }while (sjshu>=14);
  return sjshu;
}
function getColor(){
  var hex = ['1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'];
  var yanse="";
  for(i=0; i<6; i++){
    yanse+=hex[sj16()];
  }
  return "#"+yanse
}