百度地图根据省市县定位，经纬度和地址信息互相转化JS示例

<script>
// 百度地图API功能
var map = new BMap.Map("allmap");
var point, marker, m_address;

initMap(new BMap.Point('{$shop.lng}', '{$shop.lat}'));

//初始化地图
function initMap(init_point)
{
point = init_point;
map.centerAndZoom(point, 18);//地图显示
marker = new BMap.Marker(point);//创建标注
map.addOverlay(marker);
map.enableScrollWheelZoom(); //可以鼠标滚动、缩放比例尺
marker.enableDragging(); //可拖拽
//拖曳标注点的位置
marker.addEventListener("dragend", function(e){
point = marker.getPosition();//获取marker的位置
reset_location();
});
}

//实时定位
function set_location()
{
var province = $("input[name='province']").val();
var city = $("input[name='city']").val();
var county = $("input[name='county']").val();
var street = $("input[name='street']").val();

if (province=='' || city=='' || county=='')
{
$("input[name='street']").val('');
alert('请先选择完整省、市、县/区');
return false;
}

m_address = province + city + county + street;
set_place();
}

//根据经纬度获取地址
function reset_location()
{
var geoc = new BMap.Geocoder();
geoc.getLocation(point, function(rs){
var _value = rs.addressComponents;

var province = _value.province;
var city = _value.city;
var county = _value.district;
var street = _value.street + _value.streetNumber;
set_address(province, city, county, street);

m_address = province + city + county + street;
set_point(point.lng, point.lat);
});
}

//检索结果
function set_place()
{
map.clearOverlays();//清除地图上所有覆盖物
function myFun(){
point = local.getResults().getPoi(0).point;//获取第一个智能搜索的结果

initMap(point);

set_point(point.lng, point.lat);
}
//智能搜索
var local = new BMap.LocalSearch(map, {
onSearchComplete: myFun
});
local.search(m_address);
}

function set_address(province, city, county, street)
{
$("input[name='province']").val(province);
$("#province>span").html(province);
$("input[name='city']").val(city);
$("#city>span").html(city);
$("input[name='county']").val(county);
$("#county>span").html(county);
$("input[name='street']").val(street);
}
function set_point(lng, lat)
{
$("#lng").val(lng);
$("#lat").val(lat);
}
</script>
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