为什么我收到错误：流已关闭

如何解决为什么我收到错误：流已关闭

我已经解决这个问题好几天了，我已经阅读了网络上的所有内容，但没有任何效果。

为什么我的代码会产生这个错误？ 我该如何解决？

代码 Java：

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.nio.charset.StandardCharsets;
import java.util.ArrayList;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

public class VerifyTokenInApp
{
     String access_token = "";

    public void Check_InApp_Purchase(String productID,String token) throws IOException
    {
        CloseableHttpClient client = null;
        HttpGet request = null;
        CloseableHttpResponse response = null;
    
        System.out.println("productID " + productID + " token: " + token);
        try
        {
            client = HttpClientBuilder.create().build();
            request = new HttpGet("https://androidpublisher.googleapis.com/androidpublisher/v3/applications/com.my.app/purchases/products/" + productID + "/tokens/" + token + "?access_token=" + access_token);
            response = client.execute(request);
    
            // Get the response
            //BufferedReader rd = new BufferedReader(
            //  new InputStreamReader(
            //          response.getEntity().getContent()));
            //String line;
    
            //while ((line = rd.readLine()) != null)
            //{
                // Parse the response from the server
                System.out.println("line: " + line);
                int responseCode = response.getStatusLine().getStatusCode();
                String responseBody = EntityUtils.toString(response.getEntity()); //The error is here
    
                System.out.println("responseCode: " + responseCode + " responseBody: " + responseBody);
            //}
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
        finally
        {
            if (client != null) client.close();     
            if (request != null) request.releaseConnection();       
            if (response != null) response.close();
        }
    }

    void GetAccessToken() throws IOException
    {
        CloseableHttpClient httpClient = null;
        HttpPost post = null;
        CloseableHttpResponse response = null;

        try
        {
            httpClient = HttpClientBuilder.create().build();
            post = new HttpPost("https://accounts.google.com/o/oauth2/token");
            ArrayList<BasicNameValuePair> nvps = new ArrayList<BasicNameValuePair>();
            nvps.add(new BasicNameValuePair("grant_type","refresh_token"));
            nvps.add(new BasicNameValuePair("client_id","xxxxxxxxxxxx.apps.googleusercontent.com"));
            nvps.add(new BasicNameValuePair("client_secret","xxxxxxxxxxxxxxxxx"));
            nvps.add(new BasicNameValuePair("redirect_uri","https://www.my.app/"));
            nvps.add(new BasicNameValuePair("refresh_token","1//xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"));
            post.setEntity(new UrlEncodedFormEntity(nvps,StandardCharsets.UTF_8));
            response = httpClient.execute(post);
            int responseCode = response.getStatusLine().getStatusCode();
            String responseBody = EntityUtils.toString(response.getEntity());

            System.out.println("response: " + response.toString());
            System.out.println("responseCode: " + responseCode);
            System.out.println("responseBody: " + responseBody);
        }
        catch (Exception ex)
        {
            System.out.println("Error occured due to:" + ex.getMessage());
        }
        finally
        {
            httpClient.close();
            post.releaseConnection();
            response.close();
        }
    }
}

我在这个语句中得到错误："String responseBody = EntityUtils.toString(response.getEntity());"

最好在使用后关闭所有内容，对吗？

谢谢大家