百度地图API精准定位并弹窗显示门牌地址

<div id='initMap' style='display: none;'></div>
<script type='text/javascript' src='//api.map.baidu.com/api?v=3.0&ak=gHILVzmuMIlwy2Z5lE33dedbeI87UIZK'></script>
<script>
    var zd = getLocation();
    function getLocation() {
        // 百度地图API功能
        var map = new BMapGL.Map('initMap');
        var point = new BMapGL.Point(116.331398, 39.897445);
        map.centerAndZoom(point, 12);
        var geolocation = new BMapGL.Geolocation();
        geolocation.getCurrentPosition(function(r){
            console.log(r)
            if(this.getStatus() == BMAP_STATUS_SUCCESS){
                console.log('您的位置：' + r.point.lng + ',' + r.point.lat);
                var x_pi = 3.14159265358979324 * 3000.0 / 180.0;
                var x = r.point.lng;
                var y = r.point.lat;
                var z = Math.sqrt(x * x + y * y) + 0.00002 * Math.sin(y * x_pi);
                var theta = Math.atan2(y, x) + 0.000003 * Math.cos(x * x_pi);
                var lngs = z * Math.cos(theta) + 0.0065;
                var lats = z * Math.sin(theta) + 0.006;
                var point = new BMapGL.Point(lngs, lats);
                var gc = new BMapGL.Geocoder();
                gc.getLocation(point, function(rs){
                    var addComp = rs.addressComponents;
                    console.log(rs.address);//地址信息
                    alert(rs.address);
                });
            }
        });
    }
</script>
<p>该代码会在页面加载时调用百度地图API获取当前位置信息，并在弹窗中显示门牌地址。</p>