Java发送Post请求，获取返回的请求头Header

本文实例讲述了JAVA获取HTTP请求头的方法。分享给大家供大家参考，具体如下：

在利用Java网络编程时，利用Java获取HTTP Request 和 Response头字段；

可以利用Java语言根据需要添加自定义的HTTP头字段，而不必拘泥于标准HTTP定义的头字段。

代码如下：

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import lombok.extern.slf4j.Slf4j;
import org.apache.http.Header;
import org.apache.http.HeaderElement;
import org.apache.http.HttpEntity;
import org.apache.http.NameValuePair;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.junit.Test;
import java.util.*;

@Slf4j
//@RunWith(SpringJUnit4ClassRunner.class)
//@SpringBootTest
public class Test {

  @Test
  public void testRegister(){
//  public static void main(String[] args) throws Exception {

    String url = "localhost:8080/user/register";

    // 请求路径
    HttpPost httpPost=new HttpPost(url);

    // 设置请求头
    httpPost.addHeader("content-type", "application/json;chartset=UTF-8");
    httpPost.addHeader("X-USER-AUTH","USERID=123456");


    // 设置请求体
    List<NameValuePair> list = new LinkedList<>();
    BasicNameValuePair Header = new BasicNameValuePair("Header", "");
    BasicNameValuePair Body = new BasicNameValuePair("Body", "");
    list.add(Header);
    list.add(Body);
    // 使用URL实体转换工具
    UrlEncodedFormEntity entityParam = new UrlEncodedFormEntity(list, "UTF-8");
    httpPost.setEntity(entityParam);

    // 请求连接配置
    RequestConfig config = RequestConfig.custom()
            // 连接请求超时ms
            .setConnectTimeout(1000)
            // 连接超时时间ms
            .setConnectionRequestTimeout(1000)
            // 读取超时ms
            .setSocketTimeout(10 * 1000).build();

    // 设置连接配置
    httpPost.setConfig(config);
    try {

      // 发起请求
      CloseableHttpClient client = HttpClients.createDefault();
      CloseableHttpResponse response = client.execute(httpPost);

      // 获取httpClient响应的请求内容entity
      HttpEntity responseEntity = response.getEntity();
      System.out.println("接口返回参数：:"+
              JSON.parseObject(EntityUtils.toString(responseEntity, "UTF-8")));

      // 将返回体的信息转换为字符串
      String mes = EntityUtils.toString(response.getEntity());
      System.out.println("接口返回参数:"+mes);


      // 获取httpClient响应的请求头header
      Header responseHeader = response.getFirstHeader("X-USER-AUTH");
      HeaderElement[] responseHeaderElements = responseHeader.getElements();

      String phone = "";
      String sessionId = "";

      for (int i=0; i<responseHeaderElements.length; i++){
        if ("PHONE".equals(responseHeaderElements[i].getName())){
          phone = responseHeaderElements[i].getValue();
        }
        if ("SESSIONID".equals(responseHeaderElements[i].getName())){
          sessionId = responseHeaderElements[i].getValue();
        }
      }

      response.setHeader(responseHeader.getName(), responseHeader.getValue());

      System.out.println("sessionId:"+sessionId);
      System.out.println("phone:"+phone);


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

 

参考：

JAVA获取HTTP请求头的方法示例：https://www.jb51.cc/java/510781.html

HttpClient发起请求，将响应结果（header和entity）设置到response中返回：https://www.cnblogs.com/yadongliang/p/13653323.html

Java用org.apache.http.client的HttpClient发送Post请求 可获取返回Header：https://blog.csdn.net/rosanu_blog/article/details/6934855