JAVA聯網查詢IP地址歸屬

原理是根據淘寶提供的service查詢IP的歸屬地并且解析http請求返回的json串。
我之前也是伸手黨，現在也給伸手黨提供下方便。
淘寶返回的數據為：
{"code":0,"data":{"country":"\u4e2d\u56fd","country_id":"CN","area":"\u534e\u4e1c","area_id":"300000","region":"\u5c71\u4e1c\u7701","region_id":"370000","city":"\u4e1c\u8425\u5e02","city_id":"370500","county":"","county_id":"-1","isp":"\u8054\u901a","isp_id":"100026","ip":"60.214.183.158"}}
用法：
String arr1 = GetAddressByIp.GetAddressByIp("120.192.182.1");
System.out.println(arr1);
詳細請看代碼

 
package getAddressByIp;

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地址有誤";
     }
    }catch(Exception e){

        e.printStackTrace();
         resout = "獲取IP地址異常："+e.getMessage();
    }
    return resout;

}

public static String getJsonContent(String urlStr)
{
    try
    {// 獲取HttpURLConnection連接對象
        URL url = new URL(urlStr);
        HttpURLConnection httpConn = (HttpURLConnection) url
                .openConnection();
        // 設置連接屬性
        httpConn.setConnectTimeout(3000);
        httpConn.setDoInput(true);
        httpConn.setRequestMethod("GET");
        // 獲取相應碼
        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相當于內存輸出流
    ByteArrayOutputStream out = new ByteArrayOutputStream();
    byte[] buffer = new byte[1024];
    int len = 0;
    // 將輸入流轉移到內存輸出流中
    try
    {
        while ((len = inputStream.read(buffer, 0, buffer.length)) != -1)
        {
            out.write(buffer, 0, len);
        }
        // 將內存流轉換為字符串
        jsonStr = new String(out.toByteArray());
    }
    catch (IOException e)
    {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    return jsonStr;
}

}
</pre>