出现错误使用apache http core和http客户端库时，无法访问org.apache.http.HttpResponse类型。

Question

我正在尝试导入httpclient，字符串实体类和提到的所有其他类，但没有任何一个类被导入。我已将jar文件添加到生成路径，但似乎没有任何方法可以解决错误。有人可以帮我解决这个问题吗？我已经坚持了将近一天。

package httpRequests;

import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.HttpClientBuilder;

public class http {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        String IP = "api.cle.org.pk";
        String postURL = "https://" + IP+ "/v1/synth";
        HttpClient   httpClient    = HttpClientBuilder.create().build();
        HttpPost     post          = new HttpPost(postURL);
        StringEntity postingString = new StringEntity(JSON_MSG,"UTF-8");
        post.setEntity(postingString);
        post.setHeader("Content-type", "application/json;odata=verbose");
        HttpResponse response = httpClient.execute(post);
        String JSON_Response=convertStreamToString(response.getEntity().getContent());
                    
    }

}