百度地图 根据百度API获得经纬度，然后根据经纬度在获得城市信息（java方法与JS方法）

package com.pb.baiduapi;
 
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
 
/** 
* 获取经纬度
* 
* @author jueyue 返回格式：Map<String,Object> map map.put("status", 
* reader.nextString());//状态 map.put("result", list);//查询结果 
* list<map<String,String>> 
* 密钥:f247cdb592eb43ebac6ccd27f796e2d2 
*/ 
public class GetLatAndLngByBaidu { 
     
    /** 
    * @param addr 
    * 查询的地址 
    * @return 
    * @throws IOException 
    */ 
    public Object[] getCoordinate(String addr) throws IOException { 
        String lng = null;//经度
        String lat = null;//纬度
        String address = null; 
        try { 
            address = java.net.URLEncoder.encode(addr, "UTF-8"); 
        }catch (UnsupportedEncodingException e1) { 
            e1.printStackTrace(); 
        } 
        String key = "f247cdb592eb43ebac6ccd27f796e2d2"; 
        String url = String .format("http://api.map.baidu.com/geocoder?address=%s&output=json&key=%s", address, key); 
        URL myURL = null; 
        URLConnection httpsConn = null; 
        try { 
            myURL = new URL(url); 
        } catch (MalformedURLException e) { 
            e.printStackTrace(); 
        } 
        InputStreamReader insr = null;
        BufferedReader br = null;
        try { 
            httpsConn = (URLConnection) myURL.openConnection();// 不使用代理 
            if (httpsConn != null) { 
                insr = new InputStreamReader( httpsConn.getInputStream(), "UTF-8"); 
                br = new BufferedReader(insr); 
                String data = null; 
                int count = 1;
                while((data= br.readLine())!=null){ 
                    if(count==5){
                        lng = (String)data.subSequence(data.indexOf(":")+1, data.indexOf(","));//经度
                        count++;
                    }else if(count==6){
                        lat = data.substring(data.indexOf(":")+1);//纬度
                        count++;
                    }else{
                        count++;
                    }
                } 
            } 
        } catch (IOException e) { 
            e.printStackTrace(); 
        } finally {
            if(insr!=null){
                insr.close();
            }
            if(br!=null){
                br.close();
            }
        }
        return new Object[]{lng,lat}; 
    } 
 
 
    public static void main(String[] args) throws IOException {
        GetLatAndLngByBaidu getLatAndLngByBaidu = new GetLatAndLngByBaidu();
        Object[] o = getLatAndLngByBaidu.getCoordinate("成都市天府四街");
        System.out.println(o[0]);//经度
        System.out.println(o[1]);//纬度
    }
 
}

输出结果：104.04701

                 30.548397

 

调用以下路径根据经纬度获取地址，返回数据为JSON格式，

http://api.map.baidu.com/geocoder/v2/?ak=pmCgmADsAsD9rEXkqWNcTzjd&location=30.548397,104.04701&output=json&pois=1

返回结果：

{"status":0,"result":{"location":{"lng":104.04701001273,"lat":30.548396923974},"formatted_address":"四川省成都市武侯区天府四街","business":"","addressComponent":{"city":"成都市","district":"武侯区","province":"四川省","street":"天府四街","street_number":""},"pois":[{"addr":"四川省成都市武侯区天府四街","cp":"NavInfo","distance":"144","name":"保利·心语花园","poiType":"地产小区","point":{"x":104.04823889466,"y":30.54874673449},"tel":"","uid":"881965b85a8d8a977369d348","zip":""},{"addr":"四川省成都市武侯区天府四街","cp":"NavInfo","distance":"629","name":"逸都国际","poiType":"地产小区","point":{"x":104.05247889667,"y":30.547152788724},"tel":"","uid":"e49f869c4f156be9c6effb6b","zip":""},{"addr":"四川省成都市武侯区剑南大道","cp":"NavInfo","distance":"881","name":"世豪广场","poiType":"地产小区","point":{"x":104.05252381195,"y":30.553318490823},"tel":"","uid":"a2a7b0b167a0e1997adbd206","zip":""},{"addr":"四川省成都市武侯区德赛三街","cp":"NavInfo","distance":"989","name":"顾客停车场","poiType":"交通设施","point":{"x":104.04942465794,"y":30.555798655385},"tel":"","uid":"d135a6e15571911483a00cfe","zip":""}],"cityCode":75}}

 

JS方法

 

// 首先引用百度 script

<script type="text/javascript" src="http://api.map.baidu.com/api?type=quick&ak=百度密钥&v=1.0"></script>


// 然后 javascript ：

// 百度地图API功能,反之获取百度坐标点
var map = new BMap.Map("allmap");
var point = new BMap.Point(116.331398,39.897445);
var gc = new BMap.Geocoder();
gc.getLocation(point, function(rs){
   var addComp = rs.addressComponents;
   alert(addComp.province + ", " + addComp.city + ", " + addComp.district + ", " + addComp.street + ", " + addComp.streetNumber);
});

 

 地图状态方法

方法	返回值	描述
getBounds()	Bounds	返回地图可视区域，以地理坐标表示。
getCenter()	Point	返回地图当前中心点。
getDistance(start:Point, end:Point)	Number	返回两点之间的距离，单位是米。(自 1.1 新增)
getMapType()	MapTypes	返回地图类型。(自 1.1 新增)
getSize()	Size	返回地图视图的大小，以像素表示。
getViewport(view: Array<Point>[, viewportOptions: ViewportOptions])	Viewport	根据提供的地理区域或坐标获得最佳的地图视野，返回的对象中包含center和zoom属性，分别表示地图的中心点和级别。此方法仅返回视野信息，不会将新的中心点和级别做用到当前地图上。(自 1.1 新增)
getZoom()	Number	返回地图当前缩放级别。
getPanorama()new	Panorama	获取与Map类绑定的全景实例。（自 2.0新增）

 构造函数

构造函数	描述
Geocoder()	创建一个地址解析器的实例

 

 

 

方法

方法	返回值	描述
getPoint(address:String, callback:Function, city:String)	none	对指定的地址进行解析。如果地址定位成功，则以地址所在的坐标点Point为参数调用回调函数。否则，回调函数的参数为null。city为地址所在的城市名，例如“北京市”。
getLocation(point:Point, callback:function[, options: LocationOptions])	none	对指定的坐标点进行反地址解析。如果解析成功，则回调函数的参数为GeocoderResult对象，否则回调函数的参数为null。(自 1.1 新增)