Java查询IP地址所在地

[java]  view plain  copy package ip;       import java.io.ByteArrayOutputStream;   import java.io.IOException;   import java.io.InputStream;   import java.net.HttpURLConnection;   import java.net.MalformedURLException;   import java.net.URL;       import net.sf.json.JSONObject;       public class GetAddressByIp   {                public static void main(String[] args) {            String getAddressByIp = GetAddressByIp("59.60.9.2");            System.out.println(getAddressByIp);       }       /**       *        * @param IP       * @return       */       public static String GetAddressByIp(String IP){           String resout = "";           try{            String str = getJsonContent("http://ip.taobao.com/service/getIpInfo.php?ip="+IP);                        System.out.println(str);                         JSONObject obj = JSONObject.fromObject(str);            JSONObject obj2 =  (JSONObject) obj.get("data");            String code = String.valueOf(obj.get("code"));            if(code.equals("0")){                             resout =  obj2.get("country")+"--" +obj2.get("area")+"--" +obj2.get("city")+"--" +obj2.get("isp");            }else{                resout =  "IP地址有误";            }           }catch(Exception e){                               e.printStackTrace();                resout = "获取IP地址异常："+e.getMessage();           }           return resout;                    }              public static String getJsonContent(String urlStr)       {           try           {// 获取HttpURLConnection连接对象               URL url = new URL(urlStr);               HttpURLConnection httpConn = (HttpURLConnection) url                       .openConnection();               // 设置连接属性               httpConn.setConnectTimeout(3000);               httpConn.setDoInput(true);               httpConn.setRequestMethod("GET");               // 获取相应码               int respCode = httpConn.getResponseCode();               if (respCode == 200)               {                   return ConvertStream2Json(httpConn.getInputStream());               }           }           catch (MalformedURLException e)           {               e.printStackTrace();           }           catch (IOException e)           {               e.printStackTrace();           }           return "";       }                  private static String ConvertStream2Json(InputStream inputStream)       {           String jsonStr = "";           // ByteArrayOutputStream相当于内存输出流           ByteArrayOutputStream out = new ByteArrayOutputStream();           byte[] buffer = new byte[1024];           int len = 0;           // 将输入流转移到内存输出流中           try           {               while ((len = inputStream.read(buffer, 0, buffer.length)) != -1)               {                   out.write(buffer, 0, len);               }               // 将内存流转换为字符串               jsonStr = new String(out.toByteArray());           }           catch (IOException e)           {               // TODO Auto-generated catch block               e.printStackTrace();           }           return jsonStr;       }   }