将java调用百度地址匹配接口获取经纬度坐标

做项目中经常要调用 百度地图，遇到要根据坐标得到地址名称，或根据名称匹配得到经纬度坐标，所以提取出来写了两个通用方法。
需要依赖 json.jar 包。

代码如下：

/**
 * 地址匹配
 * @author 
 *
 */
public class AddressParse {
/**
 * 正向地址匹配接口
 * 根据xy获取所在省市县
 * @param xy
 * @return
 */
 public static Map geodecode(String xy){
String sUrl="http://api.map.baidu.com/geocoder/v2/?ak=8926feb9ef0a93c41c13b6103bf4dfa6&location="+xy + "&output=json&pois=0";
 String address="";
 StringBuffer str = new StringBuffer();
 Map resultMap=new HashMap();
 try {  
 java.net.URL url = new java.net.URL(sUrl);
 BufferedReader in = new BufferedReader(new InputStreamReader(url.openStream(),"utf-8"));
 String line;
 while ((line = in.readLine()) != null) {
 str.append(line);
 }
 in.close();
if (str.equals("") || str == null) {
System.err.println("百度服务无返回");
return null;
}
System.out.println(str.toString());


JSONObject jsonobj = null;
try {
jsonobj = JSONObject.fromObject(str.toString());
JSONObject result = jsonobj.getJSONObject("result");// 获取对象
JSONObject addressComponent = result
.getJSONObject("addressComponent");
String province = addressComponent
.getString("province");
resultMap.put("province",province);
String city = addressComponent.getString("city");
resultMap.put("city",city);
String district = addressComponent
.getString("district");
resultMap.put("district",district);

} catch (Exception e) {
e.printStackTrace();
System.out.println("此坐标获取不到省份："+xy);
}


 } catch (Exception e) {  
 e.printStackTrace();  
 }  
 return resultMap;
}

 /**
  * 逆向匹配接口
  * 根据地址名称，匹配得到经纬度坐标
  * @param addr
  * @return
  */
public static String geocode(String addr){
String xyStr="";
addr=URLEncoder.encode(addr);
StringBuffer str = new StringBuffer();
String lng="";
String lat="";
try {
//System.out.println("http://api.map.baidu.com/geocoder?address="+addr+"&output=json");
String sUrl="http://api.map.baidu.com/geocoder/v2/?address="+addr+"&&output=json&ak=SgntTWnUw65ysdPSghbs27noTxOuK88O";
java.net.URL url = new java.net.URL(sUrl);
//java.net.URL url = new java.net.URL("http://api.map.baidu.com/?qt=gc&wd="+addr+"&cn=%E5%85%A8%E5%9B%BD&ie=utf-8&oue=0&res=api&callback=BMap._rd._cbk96117");
BufferedReader in = new BufferedReader(new InputStreamReader(url.openStream()));
String line;
while ((line = in.readLine()) != null) {
str.append(line);
}
in.close();
JSONObject dataJson=null;
dataJson =JSONObject.fromObject(str.toString());
JSONObject result=dataJson.getJSONObject("result");
JSONObject location=result.getJSONObject("location");
lng =location.getDouble("lng")+"";
lat =location.getDouble("lat")+"";
xyStr= lng+" "+lat;
} catch (Exception e) {
lng="";
lat="";
}
return xyStr;
}

public static void main(String [] args){
String xy = AddressParse.geocode("成都市成华区建设路颐和家园7栋2801");
System.out.println(xy);

Map address = AddressParse.geodecode("40.033534,116.313289");
System.out.println(address);

}
}