复制代码 代码如下:

package test;

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.io.Reader;

import java.net.URL;

import java.nio.charset.Charset;

import org.json.JSONException;

import org.json.JSONObject;

/**

* java根据url获取json对象

* @author openks

* @since 2013-7-16

*需要添加java-json.jar才能运行

*/

public class GetPlaceByIp {

private static String readAll(Reader rd) throws IOException {

StringBuilder sb = new StringBuilder();

int cp;

while ((cp = rd.read()) != -1) {

sb.append((char) cp);

}

return sb.toString();

}

public static JSONObject readJsonFromUrl(String url) throws IOException, JSONException {

InputStream is = new URL(url).openStream();

try {

BufferedReader rd = new BufferedReader(new InputStreamReader(is, Charset.forName("UTF-8")));

String jsonText = readAll(rd);

JSONObject json = new JSONObject(jsonText);

return json;

} finally {

is.close();

// System.out.println("同时 从这里也能看出 即便return了，仍然会执行finally的！");

}

}

public static void main(String[] args) throws IOException, JSONException {

//这里调用百度的ip定位api服务 详见 http://api.map.baidu.com/lbsapi/cloud/ip-location-api.htm

JSONObject json = readJsonFromUrl("http://api.map.baidu.com/location/ip?ak=F454f8a5efe5e577997931cc01de3974&ip=202.198.16.3");

System.out.println(json.toString());

System.out.println(((JSONObject) json.get("content")).get("address"));

}

}