根据 url请求数据

public static JSONObject getJsonFromUrl(String url){
CloseableHttpClient httpClient = HttpClients.createDefault();
HttpGet httpGet = new HttpGet(url);
JSONObject jsonObject = null;

try {
HttpResponse response = httpClient.execute(httpGet);
HttpEntity entity = response.getEntity();
if(entity != null){
String result = EntityUtils.toString(entity,"UTF-8");
jsonObject = JSONObject.fromObject(result);
}

} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return jsonObject;

}