java调用淘宝api联网查询ip归属地

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
{

 
 /**
  *
  * @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) 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;
    }
}