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
    }
}

原文地址 http://www.360doc.com/content/14/1025/17/9148133_419755916.shtml