httpClient 如何使用cookie

何必百度，官网的Examples不香吗

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 * to you under the Apache License, Version 2.0 (the
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package org.apache.http.examples.client;

import java.net.URI;
import java.util.List;

import org.apache.http.HttpEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpUriRequest;
import org.apache.http.client.methods.RequestBuilder;
import org.apache.http.cookie.Cookie;
import org.apache.http.impl.client.BasicCookieStore;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

/**
 * A example that demonstrates how HttpClient APIs can be used to perform
 * form-based logon.
 */
public class ClientFormLogin {

    public static void main(String[] args) throws Exception {
        BasicCookieStore cookieStore = new BasicCookieStore();
        CloseableHttpClient httpclient = HttpClients.custom()
                .setDefaultCookieStore(cookieStore)
                .build();
        try {
            HttpGet httpget = new HttpGet("https://someportal/");
            CloseableHttpResponse response1 = httpclient.execute(httpget);
            try {
                HttpEntity entity = response1.getEntity();

                System.out.println("Login form get: " + response1.getStatusLine());
                EntityUtils.consume(entity);

                System.out.println("Initial set of cookies:");
                List<Cookie> cookies = cookieStore.getCookies();
                if (cookies.isEmpty()) {
                    System.out.println("None");
                } else {
                    for (int i = 0; i < cookies.size(); i++) {
                        System.out.println("- " + cookies.get(i).toString());
                    }
                }
            } finally {
                response1.close();
            }

            HttpUriRequest login = RequestBuilder.post()
                    .setUri(new URI("https://someportal/"))
                    .addParameter("IDToken1", "username")
                    .addParameter("IDToken2", "password")
                    .build();
            CloseableHttpResponse response2 = httpclient.execute(login);
            try {
                HttpEntity entity = response2.getEntity();

                System.out.println("Login form get: " + response2.getStatusLine());
                EntityUtils.consume(entity);

                System.out.println("Post logon cookies:");
                List<Cookie> cookies = cookieStore.getCookies();
                if (cookies.isEmpty()) {
                    System.out.println("None");
                } else {
                    for (int i = 0; i < cookies.size(); i++) {
                        System.out.println("- " + cookies.get(i).toString());
                    }
                }
            } finally {
                response2.close();
            }
        } finally {
            httpclient.close();
        }
    }
}

https://hc.apache.org/httpcomponents-client-4.5.x/httpclient/examples/org/apache/http/examples/client/ClientFormLogin.java
一个很好的httpClient讲解文章：https://blog.csdn.net/justry_deng/article/details/81042379
非本文内容。