Java根据百度API获得经纬度，然后根据经纬度在获得城市信息详解编程语言

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}}