根据百度API获得经纬度，然后根据经纬度在获得城市信息

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