Posted in Javascript onMay 11, 2012
最近做百度地图的模拟数据，需要获取某条公交线路沿途站点的坐标信息，貌似百度没有现成的API，因此做了一个模拟页面，工具而已，IE6/7/8不支持
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>获取公交站点坐标</title>
<style type="text/css">
html,body{ height: 100%;}
#results,#coordinate{ display: inline-block; width: 45%; min-height: 200px; border:1px solid #e4e4e4; vertical-align: top;}
</style>
<script src="http://api.map.baidu.com/api?v=1.3" type="text/javascript"></script>
</head>
<body>
<p><label for="busId">公交线路：</label><input type="text" value="521" id="busId" /><input type="button" id="btn-search" value="查询" /></p>
<div id="results"></div>
<div id="coordinate"></div>
<script type="text/javascript">
(function(){
var tempVar;
var busline = new BMap.BusLineSearch('武汉',{
renderOptions:{panel:"results"},
onGetBusListComplete: function(result){
if(result) {
tempVar = result;//此时的结果并不包含坐标信息，所以getCoordinate函数不能在此调用。通过跟踪变量，坐标是在onGetBusListComplete之后才被百度的包添加进来的
busline.getBusLine(result.getBusListItem(0));
}
},
// api文档中一共有四个回调，除了onGetBusListComplete和onBusLineHtmlSet之外，还有onBusListHtmlSet和onGetBusLineComplete，
// 经过测试只有在onBusLineHtmlSet这一步（线路格式化完毕）的时候，才会将坐标添加到tempVar中
// 所以上面busline.getBusLine(result.getBusListItem(0));是必须的，不然没有办法获得坐标列表
onBusLineHtmlSet : function(){
try{
getCoordinate(tempVar);
}catch(e){
}
}
});
function getCoordinate(result){
var coordinate = document.getElementById("coordinate");
var stations = result['0']._stations;
var html = [];
stations.forEach(function(item){
html.push('<li>' + item.name + ' ' + item.position.lng + ' ' + item.position.lat + '</li>');
});
coordinate.innerHTML = '<ul>' + html.join('') + '</ul>';
}
document.getElementById('btn-search').onclick = function(){
busline.getBusList(document.getElementById("busId").value);
}
})();
</script>
</body>
</html> 获取反向线路的话就把var stations = result['0']._stations;改为var stations = result[xx]._stations;整理了一下：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>获取公交站点坐标</title>
<style type="text/css">
html,body{ height: 100%;}
#results,#coordinate{ display: inline-block; width: 45%; min-height: 200px; border:1px solid #e4e4e4; vertical-align: top;}
</style>
<script src="http://api.map.baidu.com/api?v=1.3" type="text/javascript"></script>
</head>
<body>
<p><label for="busId">公交线路：</label><input type="text" value="581" id="busId" /><input type="button" id="btn-search" value="查询" /></p>
<div id="results"></div>
<div id="coordinate"></div>
<script type="text/javascript">
var global = {};
global.tempVar = {};
global.index = 0;
global.lineNo = 0;
var busline = new BMap.BusLineSearch('武汉',{
renderOptions:{panel:"results"},
onGetBusListComplete: function(result){
if(result) {
global.tempVar = result;
}
},
onBusLineHtmlSet : function(){
try{
getCoordinate(global.tempVar);
}catch(e){
}
}
});
function $$(id){
return document.getElementById(id);
}
function getCoordinate(result){
var coordinate = $$("coordinate");
var stations = result[global.index]._stations;
var html = [];
stations.forEach(function(item,index){
html.push('<li>' + global.lineNo + '#' + global.index + '#' + index + '#' + item.name + '#' + item.position.lng + '#' + item.position.lat + '</li>');
});
coordinate.innerHTML = '<ul>' + html.join('') + '</ul>';
}
$$('btn-search').onclick = function(){
global.lineNo = $$("busId").value;
busline.getBusList(global.lineNo);
}
$$('results').addEventListener('click',function(event){
var target = event.target;
if('a' == target.tagName.toLowerCase() && 'dt' == target.parentNode.tagName.toLowerCase()){
event.preventDefault();
var tempHtml = target.parentNode.innerHTML;
var indexOfValue = tempHtml.indexOf('_selectBusListItem(');
global.index = - ( - tempHtml.substring(indexOfValue + '_selectBusListItem('.length,indexOfValue + '_selectBusListItem('.length + 1) );
busline.getBusLine(global.tempVar.getBusListItem(global.index));
}
},false);
</script>
</body>
</html> 来自小西山子
通过百度地图获取公交线路的站点坐标的js代码
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