百度地图Web服务API——正/逆地理编码服务

正/逆地理编码服务（又名Geocoding API）是一类Web API接口服务；

正向地理编码服务提供将结构化地址数据（如：北京市海淀区上地十街十号）转换为对应坐标点（经纬度）功能；

逆向地理编码服务提供将坐标点（经纬度）转换为对应位置信息（如所在行政区划，周边地标点分布）功能。

逆地理编码官方参考链接:http://api./geocoder/v2/?callback=renderReverse&location=39.934,116.329&output=json&pois=1&ak=您的ak//GET请求

参数:

callback: 将json格式的返回值通过callback函数返回以实现jsonp功能，不需要jsonp格式的可不添加。location: 经纬度坐标，格式——纬度，经度。output: 输出格式，可为json或xml，默认xml。pois:当值为1时，默认显示周边1000米内的poi; 0时不显示。ak:用户申请百度开发者注册的key，自v2开始参数修改为“ak”，之前版本参数为“key”申请ak

返回示例:

添加callback=renderReverse参数

renderReverse&&renderReverse({"status":0,"result":{"location":{"lng":116.32899999999994,"lat":39.93400007551505},"formatted_address":"北京市海淀区增光路35-6号","business":"航天桥,甘家口,车公庄","addressComponent":{"country":"中国","country_code":0,"country_code_iso":"CHN","country_code_iso2":"CN","province":"北京市","city":"北京市","city_level":2,"district":"海淀区","town":"","adcode":"110108","street":"增光路","street_number":"35-6号","direction":"附近","distance":"13"},"pois":[],"roads":[],"poiRegions":[],"sematic_description":"中国建设银行(增光路支行)附近8米","cityCode":131}})

不添加callback=renderReverse参数

{"status":0,"result":{"location":{"lng":116.32899999999994,"lat":39.93400007551505},"formatted_address":"北京市海淀区增光路35-6号","business":"航天桥,甘家口,车公庄","addressComponent":{"country":"中国","country_code":0,"country_code_iso":"CHN","country_code_iso2":"CN","province":"北京市","city":"北京市","city_level":2,"district":"海淀区","town":"","adcode":"110108","street":"增光路","street_number":"35-6号","direction":"附近","distance":"13"},"pois":[],"roads":[],"poiRegions":[],"sematic_description":"中国建设银行(增光路支行)附近8米","cityCode":131}}

//设向接口链接发送请求返回结果为 findings，可将结果转成json格式JSONObject parseObject = JSON.parseObject(findings);//获取返回结果result结果集，继续转成json格式JSONObject jsonObject = parseObject.getJSONObject("result");//可通过key获取示例result中的重要属性jsonObject.getString("formatted_address");jsonObject.getString("business");jsonObject.getString("sematic_description"));

正地理编码类似，更简单，就不在此处详述了。

更多详情可查看官方服务文档:/index.php?title=webapi/guide/webservice-geocoding