从Apache HttpClient获取响应时出现问题

Question

我尝试使用HTTP POST操作的响应正文。我正在实施以下方法：

public class post2 {

    public final static void main(String[] args) throws Exception {

        CloseableHttpClient httpclient = HttpClients.createDefault();

        List<NameValuePair> formparams = new ArrayList <NameValuePair>();
        formparams.add(new BasicNameValuePair("login_id", myID));
        formparams.add(new BasicNameValuePair("api_key", myKey));
        UrlEncodedFormEntity entity = new UrlEncodedFormEntity(formparams, Consts.UTF_8);
        HttpPost httppost = new HttpPost(myURL);
        httppost.setEntity(entity);

        CloseableHttpResponse response2 = httpclient.execute(httppost);

        try {

            System.out.println(response2.getStatusLine());
            HttpEntity entity2 = response2.getEntity();
            EntityUtils.consume(entity2);

            String responseBody = EntityUtils.toString(entity2);
            System.out.println("finalResult"+responseBody.toString());              
        }

        finally {
             httpclient.close();
        }
    }
}

我刚收到＆＃34; HTTP / 1.1 200 OK＆＃34;，然后是：

Exception in thread "main" java.lang.ClassCastException: org.apache.http.impl.execchain.HttpResponseProxy cannot be cast to org.apache.http.HttpEntity
at post2.main(post2.java:62)

我应该如何从WebService恢复身体信息？

谢谢， 利奥

Answer 1

必须将EntityUtils.consume(entity2);移到块的末尾：

public final static void main(String[] args) throws Exception {

    CloseableHttpClient httpclient = HttpClients.createDefault();

    List<NameValuePair> formparams = new ArrayList <NameValuePair>();
    formparams.add(new BasicNameValuePair("login_id", myID));
    formparams.add(new BasicNameValuePair("api_key", myKey));
    UrlEncodedFormEntity entity = new UrlEncodedFormEntity(formparams, Consts.UTF_8);
    HttpPost httppost = new HttpPost(myURL);
    httppost.setEntity(entity);

    CloseableHttpResponse response2 = httpclient.execute(httppost);

    try{

        System.out.println(response2.getStatusLine());
        HttpEntity entity2 = response2.getEntity();
        String responseBody = EntityUtils.toString(entity2);
        System.out.println("finalResult"+responseBody.toString());
        EntityUtils.consume(entity2);


    }

    finally {

         httpclient.close();
    }
}