每当我尝试解析URL响应时获取一个空的JSON数组

Question

我正在研究概念验证，看看我是否可以解析X URL的响应。我得到一个JSON对象数组每当我在浏览器上点击这个URL时，每当我尝试使用下面的Java代码解析相同的URL时，我会得到一个空的JSON数组。我想知道这是否属于正常行为？它有什么解释吗？我使用正确的方法来获取数据吗？

{
 "campaigns": [
 ]
};

import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;

public class HTTPGetTest {


    public static void main(String[] args) {

     try {
            HttpClient httpclient = new DefaultHttpClient();
            HttpGet httpGet = new HttpGet("http://XXXX");
            // Execute HTTP Post Request
            HttpResponse response = httpclient.execute(httpGet);
            String jSONString= EntityUtils.toString(response.getEntity(), "UTF-8");
            System.out.println("jSONString : "+ jSONString);

            } catch (ClientProtocolException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            } catch (Exception e) {
                e.printStackTrace();
            }

    }


}