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}}