本文介绍了js实现百度地图同时显示多个路书效果，主要是以自行车的还车地点作为实例，具体代码如下：

启动路书：

<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><>

var BMapLib = window.BMapLib = BMapLib || {}; (function() { var b, a = b = a || { version : "1.5.0" }; a.guid = "$BAIDU$"; (function() { window[a.guid] = window[a.guid] || {}; a.dom = a.dom || {}; a.dom.g = function(e) { if ("string" == typeof e || e instanceof String) { return document.getElementById(e) } else { if (e && e.nodeName && (e.nodeType == 1 || e.nodeType == 9)) { return e } } return null }; a.g = a.G = a.dom.g; a.lang = a.lang || {}; a.lang.isString = function(e) { return "[object String]" == Object.prototype.toString.call(e) }; a.isString = a.lang.isString; a.dom._g = function(e) { if (a.lang.isString(e)) { return document.getElementById(e) } return e }; a._g = a.dom._g; a.dom.getDocument = function(e) { e = a.dom.g(e); return e.nodeType == 9 ? e : e.ownerDocument || e.document }; a.browser = a.browser || {}; a.browser.ie = a.ie = /msie (d+.d+)/i.test(navigator.userAgent) ? (document.documentMode || +RegExp["x241"]) : undefined; a.dom.getComputedStyle = function(f, e) { f = a.dom._g(f); var h = a.dom.getDocument(f), g; if (h.defaultView && h.defaultView.getComputedStyle) { g = h.defaultView.getComputedStyle(f, null); if (g) { return g[e] || g.getPropertyValue(e) } } return "" }; a.dom._styleFixer = a.dom._styleFixer || {}; a.dom._styleFilter = a.dom._styleFilter || []; a.dom._styleFilter.filter = function(f, j, k) { for (var e = 0, h = a.dom._styleFilter, g; g = h[e]; e++) { if (g = g[k]) { j = g(f, j) } } return j }; a.string = a.string || {}; a.string.toCamelCase = function(e) { if (e.indexOf("-") < 0 && e.indexOf("_") < 0) { return e } return e.replace(/[-_][^-_]/g, function(f) { return f.charAt(1).toUpperCase() }) }; a.dom.getStyle = function(g, f) { var i = a.dom; g = i.g(g); f = a.string.toCamelCase(f); var h = g.style[f] || (g.currentStyle ? g.currentStyle[f] : "") || i.getComputedStyle(g, f); if (!h) { var e = i._styleFixer[f]; if (e) { h = e.get ? e.get(g) : a.dom.getStyle(g, e) } } if (e = i._styleFilter) { h = e.filter(f, h, "get") } return h }; a.getStyle = a.dom.getStyle; a.dom._NAME_ATTRS = (function() { var e = { cellpadding : "cellPadding", cellspacing : "cellSpacing", colspan : "colSpan", rowspan : "rowSpan", valign : "vAlign", usemap : "useMap", frameborder : "frameBorder" }; if (a.browser.ie < 8) { e["for"] = "htmlFor"; e["class"] = "className" } else { e.htmlFor = "for"; e.className = "class" } return e })(); a.dom.setAttr = function(f, e, g) { f = a.dom.g(f); if ("style" == e) { f.style.cssText = g } else { e = a.dom._NAME_ATTRS[e] || e; f.setAttribute(e, g) } return f }; a.setAttr = a.dom.setAttr; a.dom.setAttrs = function(g, e) { g = a.dom.g(g); for ( var f in e) { a.dom.setAttr(g, f, e[f]) } return g }; a.setAttrs = a.dom.setAttrs; a.dom.create = function(g, e) { var h = document.createElement(g), f = e || {}; return a.dom.setAttrs(h, f) }; a.object = a.object || {}; a.extend = a.object.extend = function(g, e) { for ( var f in e) { if (e.hasOwnProperty(f)) { g[f] = e[f] } } return g } })(); var c = BMapLib.LuShu = function(g, f, e) { if (!f || f.length < 1) { return } this._map = g; this._path = f; this.i = 0; this._setTimeoutQuene = []; this._projection = this._map.getMapType().getProjection(); this._opts = { icon : null, speed : 4000, defaultContent : "" }; this._setOptions(e); this._rotation = 0; if (!this._opts.icon instanceof BMap.Icon) { this._opts.icon = defaultIcon } }; c.prototype._setOptions = function(e) { if (!e) { return } for ( var f in e) { if (e.hasOwnProperty(f)) { this._opts[f] = e[f] } } }; c.prototype.start = function() { var f = this, e = f._path.length; if (f.i && f.i < e - 1) { if (!f._fromPause) { return } else { if (!f._fromStop) { f._moveNext(++f.i) } } } else { f._addMarker(); f._timeoutFlag = setTimeout(function() { f._addInfoWin(); if (f._opts.defaultContent == "") { f.hideInfoWindow() } f._moveNext(f.i) }, 400) } this._fromPause = false; this._fromStop = false }, c.prototype.stop = function() { this.i = 0; this._fromStop = true; clearInterval(this._intervalFlag); this._clearTimeout(); for (var g = 0, f = this._opts.landmarkPois, e = f.length; g < e; g++) { f[g].bShow = false } }; c.prototype.pause = function() { clearInterval(this._intervalFlag); this._fromPause = true; this._clearTimeout() }; c.prototype.hideInfoWindow = function() { this._overlay._div.style.visibility = "hidden" }; c.prototype.showInfoWindow = function() { this._overlay._div.style.visibility = "visible" }; a.object .extend( c.prototype, { _addMarker : function(f) { if (this._marker) { this.stop(); this._map.removeOverlay(this._marker); clearTimeout(this._timeoutFlag) } this._overlay && this._map.removeOverlay(this._overlay); var e = new BMap.Marker(this._path[0]); this._opts.icon && e.setIcon(this._opts.icon); this._map.addOverlay(e); e.setAnimation(BMAP_ANIMATION_DROP); this._marker = e }, _addInfoWin : function() { var f = this; var e = new d(f._marker.getPosition(), f._opts.defaultContent); e.setRelatedClass(this); this._overlay = e; this._map.addOverlay(e) }, _getMercator : function(e) { return this._map.getMapType().getProjection() .lngLatToPoint(e) }, _getDistance : function(f, e) { return Math.sqrt(Math.pow(f.x - e.x, 2) + Math.pow(f.y - e.y, 2)) }, _move : function(n, j, m) { var i = this, h = 0, e = 10, f = this._opts.speed / (1000 / e), l = this._projection .lngLatToPoint(n), k = this._projection .lngLatToPoint(j), g = Math.round(i ._getDistance(l, k) / f); if (g < 1) { i._moveNext(++i.i); return } i._intervalFlag = setInterval( function() { if (h >= g) { clearInterval(i._intervalFlag); if (i.i > i._path.length) { return } i._moveNext(++i.i) } else { h++; var o = m(l.x, k.x, h, g), r = m( l.y, k.y, h, g), q = i._projection .pointToLngLat(new BMap.Pixel( o, r)); if (h == 1) { var p = null; if (i.i - 1 >= 0) { p = i._path[i.i - 1] } if (i._opts.enableRotation == true) { i.setRotation(p, n, j) } if (i._opts.autoView) { if (!i._map.getBounds() .containsPoint(q)) { i._map.setCenter(q) } } } i._marker.setPosition(q); i._setInfoWin(q) } }, e) }, setRotation : function(l, f, m) { var j = this; var e = 0; f = j._map.pointToPixel(f); m = j._map.pointToPixel(m); if (m.x != f.x) { var k = (m.y - f.y) / (m.x - f.x), g = Math .atan(k); e = g * 360 / (2 * Math.PI); if (m.x < f.x) { e = -e + 90 + 90 } else { e = -e } j._marker.setRotation(-e) } else { var h = m.y - f.y; var i = 0; if (h > 0) { i = -1 } else { i = 1 } j._marker.setRotation(-i * 90) } return }, linePixellength : function(f, e) { return Math.sqrt(Math.abs(f.x - e.x) * Math.abs(f.x - e.x) + Math.abs(f.y - e.y) * Math.abs(f.y - e.y)) }, pointToPoint : function(f, e) { return Math.abs(f.x - e.x) * Math.abs(f.x - e.x) + Math.abs(f.y - e.y) * Math.abs(f.y - e.y) }, _moveNext : function(e) { var f = this; if (e < this._path.length - 1) { f._move(f._path[e], f._path[e + 1], f._tween.linear) } }, _setInfoWin : function(g) { var f = this; if (!f._overlay) { return } f._overlay.setPosition(g, f._marker.getIcon().size); var e = f._troughPointIndex(g); if (e != -1) { clearInterval(f._intervalFlag); f._overlay .setHtml(f._opts.landmarkPois[e].html); f._overlay.setPosition(g, f._marker.getIcon().size); f._pauseForView(e) } else { f._overlay.setHtml(f._opts.defaultContent) } }, _pauseForView : function(e) { var g = this; var f = setTimeout(function() { g._moveNext(++g.i) }, g._opts.landmarkPois[e].pauseTime * 1000); g._setTimeoutQuene.push(f) }, _clearTimeout : function() { for ( var e in this._setTimeoutQuene) { clearTimeout(this._setTimeoutQuene[e]) } this._setTimeoutQuene.length = 0 }, _tween : { linear : function(f, j, h, i) { var e = f, l = j - f, g = h, k = i; return l * g / k + e } }, _troughPointIndex : function(f) { var h = this._opts.landmarkPois, j; for (var g = 0, e = h.length; g < e; g++) { if (!h[g].bShow) { j = this._map.getDistance(new BMap.Point( h[g].lng, h[g].lat), f); if (j < 10) { h[g].bShow = true; return g } } } return -1 } }); function d(e, f) { this._point = e; this._html = f } d.prototype = new BMap.Overlay(); d.prototype.initialize = function(e) { var f = this._div = a.dom .create( "div", { style : "border:solid 1px #ccc;width:auto;min-width:50px;text-align:center;position:absolute;background:#fff;color:#000;font-size:12px;border-radius: 10px;padding:5px;white-space: nowrap;" }); f.innerHTML = this._html; e.getPanes().floatPane.appendChild(f); this._map = e; return f }; d.prototype.draw = function() { this.setPosition(this.lushuMain._marker.getPosition(), this.lushuMain._marker.getIcon().size) }; a.object.extend(d.prototype, { setPosition : function(h, i) { var f = this._map.pointToOverlayPixel(h), e = a.dom.getStyle( this._div, "width"), g = a.dom .getStyle(this._div, "height"); overlayW = parseInt(this._div.clientWidth || e, 10), overlayH = parseInt(this._div.clientHeight || g, 10); this._div.style.left = f.x - overlayW / 2 + "px"; this._div.style.bottom = -(f.y - i.height) + "px" }, setHtml : function(e) { this._div.innerHTML = e }, setRelatedClass : function(e) { this.lushuMain = e } }) })();

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 }

效果图：

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