[网络协议]Java通过HttpClient4实现Https Get/Post请求

Maven配置

		<dependency>
			<groupId>org.apache.httpcomponents</groupId>
			<artifactId>httpcore</artifactId>
			<version>4.4.8</version>
		</dependency>
		<dependency>
			<groupId>org.apache.httpcomponents</groupId>
			<artifactId>httpclient</artifactId>
			<version>4.5.3</version>
		</dependency>

SSLClient类源码

import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.security.cert.X509Certificate;
import java.util.Arrays;

import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;

import org.apache.http.client.config.AuthSchemes;
import org.apache.http.client.config.CookieSpecs;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.config.Registry;
import org.apache.http.config.RegistryBuilder;
import org.apache.http.conn.socket.ConnectionSocketFactory;
import org.apache.http.conn.socket.PlainConnectionSocketFactory;
import org.apache.http.conn.ssl.NoopHostnameVerifier;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;

/**
 * @author 作者: Alderaan
 * @version 创建时间：2022年3月3日 上午10:24:40
 *
 */
public class SSLClient extends HttpClientBuilder
{
	public CloseableHttpClient getSSLClient() throws Exception
	{
		try
		{
			// 在调用SSL之前需要重写验证方法，取消检测SSL
			X509TrustManager trustManager = new X509TrustManager()
			{
				public X509Certificate[] getAcceptedIssuers()
				{
					return null;
				}

				public void checkClientTrusted(X509Certificate[] xcs, String str)
				{
				}

				public void checkServerTrusted(X509Certificate[] xcs, String str)
				{
				}
			};

			SSLContext ctx = SSLContext.getInstance(SSLConnectionSocketFactory.TLS);
			ctx.init(null, new TrustManager[] { trustManager }, null);
			SSLConnectionSocketFactory socketFactory = new SSLConnectionSocketFactory(ctx,
					NoopHostnameVerifier.INSTANCE);

			// 创建Registry
			RequestConfig requestConfig = RequestConfig.custom().setCookieSpec(CookieSpecs.STANDARD_STRICT)
					.setExpectContinueEnabled(Boolean.TRUE)
					.setTargetPreferredAuthSchemes(Arrays.asList(AuthSchemes.NTLM, AuthSchemes.DIGEST))
					.setProxyPreferredAuthSchemes(Arrays.asList(AuthSchemes.BASIC)).build();
			Registry<ConnectionSocketFactory> socketFactoryRegistry = RegistryBuilder.<ConnectionSocketFactory>create()
					.register("http", PlainConnectionSocketFactory.INSTANCE).register("https", socketFactory).build();

			// 创建ConnectionManager，添加Connection配置信息
			PoolingHttpClientConnectionManager connectionManager = new PoolingHttpClientConnectionManager(
					socketFactoryRegistry);
			CloseableHttpClient closeableHttpClient = HttpClients.custom().setConnectionManager(connectionManager)
					.setDefaultRequestConfig(requestConfig).build();

			return closeableHttpClient;
		} catch (KeyManagementException ex)
		{
			throw new RuntimeException(ex);
		} catch (NoSuchAlgorithmException ex)
		{
			throw new RuntimeException(ex);
		}
	}
}

App类源码

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.util.EntityUtils;

/**
 * @author 作者: Alderaan
 * @version 创建时间：2022年3月3日 上午10:22:23
 *
 */
public class App
{
	public static void testhttpsget(String url)
	{
		HttpClient httpClient = null;
		HttpGet httpGet = null;
		String result = null;

		try
		{
			httpClient = new SSLClient().getSSLClient();
			httpGet = new HttpGet(url);
			// 设置参数
			// httpGet.addHeader("Accept", "application/json");
			// httpGet.addHeader("Content-Type", "application/json;charset=UTF-8");

			HttpResponse response = httpClient.execute(httpGet);

			if (response != null)
			{
				HttpEntity resEntity = response.getEntity();

				if (resEntity != null)
				{
					result = EntityUtils.toString(resEntity, "UTF-8");

					if (200 == response.getStatusLine().getStatusCode())
					{
						System.out.println("HTTPS Get请求成功！");
						System.out.println(result);
					} else
					{
						System.out.println("HTTPS Get错误码：" + response.getStatusLine().getStatusCode());
						System.out.println(result);
					}
				}
			}
		} catch (Exception ex)
		{
			ex.printStackTrace();
		}
		return;
	}

	public static void testhttpspost(String url)
	{
		HttpClient httpClient = null;
		HttpPost httpPost = null;
		String result = null;

		try
		{
			httpClient = new SSLClient().getSSLClient();
			httpPost = new HttpPost(url);
			// 设置参数
			// httpPost.addHeader("Accept", "application/json");
			// httpPost.addHeader("Content-Type", "application/json;charset=UTF-8");

			HttpResponse response = httpClient.execute(httpPost);

			if (response != null)
			{
				HttpEntity resEntity = response.getEntity();

				if (resEntity != null)
				{
					result = EntityUtils.toString(resEntity, "UTF-8");

					if (200 == response.getStatusLine().getStatusCode())
					{
						System.out.println("HTTPS Post请求成功！");
						System.out.println(result);
					} else
					{
						System.out.println("HTTPS Post错误码：" + response.getStatusLine().getStatusCode());
						System.out.println(result);
					}
				}
			}
		} catch (Exception ex)
		{
			ex.printStackTrace();
		}
		return;
	}

	public static void main(String[] args)
	{
		System.out.println("开始测试HTTPS Get请求。");
		testhttpsget("https://www.baidu.com");
		System.out.println("开始测试HTTPS Post请求。(百度不响应Post，所以会返回错误码)");
		testhttpspost("https://www.baidu.com/s?wd=post");
	}
}

运行结果如下

开始测试HTTPS Get请求。
HTTPS Get请求成功！
<!DOCTYPE html>
<!--STATUS OK--><html> <head><meta http-equiv=content-type content=text/html;charset=utf-8><meta http-equiv=X-UA-Compatible content=IE=Edge><meta content=always name=referrer><link rel=stylesheet type=text/css href=https://ss1.bdstatic.com/5eN1bjq8AAUYm2zgoY3K/r/www/cache/bdorz/baidu.min.css><title>百度一下，你就知道</title></head> <body link=#0000cc> <div id=wrapper> <div id=head> <div class=head_wrapper> <div class=s_form> <div class=s_form_wrapper> <div id=lg> <img hidefocus=true src=//www.baidu.com/img/bd_logo1.png width=270 height=129> </div> <form id=form name=f action=//www.baidu.com/s class=fm> <input type=hidden name=bdorz_come value=1> <input type=hidden name=ie value=utf-8> <input type=hidden name=f value=8> <input type=hidden name=rsv_bp value=1> <input type=hidden name=rsv_idx value=1> <input type=hidden name=tn value=baidu><span class="bg s_ipt_wr"><input id=kw name=wd class=s_ipt value maxlength=255 autocomplete=off autofocus=autofocus></span><span class="bg s_btn_wr"><input type=submit id=su value=百度一下 class="bg s_btn" autofocus></span> </form> </div> </div> <div id=u1> <a href=http://news.baidu.com name=tj_trnews class=mnav>新闻</a> <a href=https://www.hao123.com name=tj_trhao123 class=mnav>hao123</a> <a href=http://map.baidu.com name=tj_trmap class=mnav>地图</a> <a href=http://v.baidu.com name=tj_trvideo class=mnav>视频</a> <a href=http://tieba.baidu.com name=tj_trtieba class=mnav>贴吧</a> <noscript> <a href=http://www.baidu.com/bdorz/login.gif?login&amp;tpl=mn&amp;u=http%3A%2F%2Fwww.baidu.com%2f%3fbdorz_come%3d1 name=tj_login class=lb>登录</a> </noscript> <script>document.write('<a href="http://www.baidu.com/bdorz/login.gif?login&tpl=mn&u='+ encodeURIComponent(window.location.href+ (window.location.search === "" ? "?" : "&")+ "bdorz_come=1")+ '" name="tj_login" class="lb">登录</a>');
                </script> <a href=//www.baidu.com/more/ name=tj_briicon class=bri style="display: block;">更多产品</a> </div> </div> </div> <div id=ftCon> <div id=ftConw> <p id=lh> <a href=http://home.baidu.com>关于百度</a> <a href=http://ir.baidu.com>About Baidu</a> </p> <p id=cp>&copy;2017&nbsp;Baidu&nbsp;<a href=http://www.baidu.com/duty/>使用百度前必读</a>&nbsp; <a href=http://jianyi.baidu.com/ class=cp-feedback>意见反馈</a>&nbsp;京ICP证030173号&nbsp; <img src=//www.baidu.com/img/gs.gif> </p> </div> </div> </div> </body> </html>

开始测试HTTPS Post请求。(百度查询是Get请求，所以会返回错误码)
错误码：302
<html>
<head><title>302 Found</title></head>
<body bgcolor="white">
<center><h1>302 Found</h1></center>
<hr><center>nginx</center>
</body>
</html>