Java根據百度API獲得經緯度，然后根據經緯度在獲得城市信息

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;

/**

獲取經緯度

@author jueyue 返回格式：Map<String,Object> map map.put("status", 
reader.nextString());//狀態 map.put("result", list);//查詢結果 
list<map<String,String>> 
密鑰:f247cdb592eb43ebac6ccd27f796e2d2 
*/ 
public class GetLatAndLngByBaidu {
/**

@param addr 
查詢的地址 
@return 
@throws IOException 
*/ 
public Object[] getCoordinate(String addr) throws IOException { 
  String lng = null;//經度
  String lat = null;//緯度
  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&quot;, 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(","));//經度
              count++;
          }else if(count==6){
              lat = data.substring(data.indexOf(":")+1);//緯度
              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]);//經度
    System.out.println(o[1]);//緯度
}


}</pre> 


 輸出結果：104.04701 
 
                  30.548397 
 
   
 
 調用以下路徑根據經緯度獲取地址，返回數據為JSON格式， 
 
 http://api.map.baidu.com/geocoder/v2/?ak=pmCgmADsAsD9rEXkqWNcTzjd&location=30.548397,104.04701&output=json&pois=1 
 
 返回結果： 
{"status":0,"result":{"location":{"lng":104.04701001273,"lat":30.548396923974},"formatted_address":"四川省成都市武侯區天府四街","business":"","addressComponent":{"city":"成都市","district":"武侯區","province":"四川省","street":"天府四街","street_number":""},"pois":[{"addr":"四川省成都市武侯區天府四街","cp":"NavInfo","distance":"144","name":"保利·心語花園","poiType":"地產小區","point":{"x":104.04823889466,"y":30.54874673449},"tel":"","uid":"881965b85a8d8a977369d348","zip":""},{"addr":"四川省成都市武侯區天府四街","cp":"NavInfo","distance":"629","name":"逸都國際","poiType":"地產小區","point":{"x":104.05247889667,"y":30.547152788724},"tel":"","uid":"e49f869c4f156be9c6effb6b","zip":""},{"addr":"四川省成都市武侯區劍南大道","cp":"NavInfo","distance":"881","name":"世豪廣場","poiType":"地產小區","point":{"x":104.05252381195,"y":30.553318490823},"tel":"","uid":"a2a7b0b167a0e1997adbd206","zip":""},{"addr":"四川省成都市武侯區德賽三街","cp":"NavInfo","distance":"989","name":"顧客停車場","poiType":"交通設施","point":{"x":104.04942465794,"y":30.555798655385},"tel":"","uid":"d135a6e15571911483a00cfe","zip":""}],"cityCode":75}}