版权声明：本文为博主原创文章，未经博主允许不得转载。如需转载请声明：【转自 http://blog.csdn.net/xiaoxian8023 】      上篇文章说道httpclient不能直接访问https的资源，这次就来模拟一下环境，然后配置https测试一下。在前面的文章中，分享了一篇自己生成并在tomcat中配置ssl的文章《[Tomcat配置SSL](http://blog.csdn.net/xiaoxian8023/article/details/49619777)》，大家可以据此来在本地配置https。我已经配置好了，效果是这样滴：       可以看到已经信任该证书（显示浅绿色小锁），浏览器可以正常访问。现在我们用代码测试一下： ~~~ public static void main(String[] args) throws ParseException, IOException, KeyManagementException, NoSuchAlgorithmException, HttpProcessException { String url = "https://sso.tgb.com:8443/cas/login"; String body = send(url, null, "utf-8"); System.out.println("交易响应结果："); System.out.println(body); System.out.println("-----------------------------------"); } ~~~       发现抛出了异常，我知道的有两种方案（也许还有我不知道的方案），这里介绍第一种方案，也是用的比较多的方案——绕过证书验证。直接看代码吧： ~~~ /** * 绕过验证 * * @return * @throws NoSuchAlgorithmException * @throws KeyManagementException */ public static SSLContext createIgnoreVerifySSL() throws NoSuchAlgorithmException, KeyManagementException { SSLContext sc = SSLContext.getInstance("SSLv3"); // 实现一个X509TrustManager接口，用于绕过验证，不用修改里面的方法 X509TrustManager trustManager = new X509TrustManager() { @Override public void checkClientTrusted( java.security.cert.X509Certificate[] paramArrayOfX509Certificate, String paramString) throws CertificateException { } @Override public void checkServerTrusted( java.security.cert.X509Certificate[] paramArrayOfX509Certificate, String paramString) throws CertificateException { } @Override public java.security.cert.X509Certificate[] getAcceptedIssuers() { return null; } }; sc.init(null, new TrustManager[] { trustManager }, null); return sc; } ~~~      然后修改原来的send方法： ~~~ /** * 模拟请求 * * @param url 资源地址 * @param map 参数列表 * @param encoding 编码 * @return * @throws NoSuchAlgorithmException * @throws KeyManagementException * @throws IOException * @throws ClientProtocolException */ public static String send(String url, Map<String,String> map,String encoding) throws KeyManagementException, NoSuchAlgorithmException, ClientProtocolException, IOException { String body = ""; //采用绕过验证的方式处理https请求 SSLContext sslcontext = createIgnoreVerifySSL(); // 设置协议http和https对应的处理socket链接工厂的对象 Registry<ConnectionSocketFactory> socketFactoryRegistry = RegistryBuilder.<ConnectionSocketFactory>create() .register("http", PlainConnectionSocketFactory.INSTANCE) .register("https", new SSLConnectionSocketFactory(sslcontext)) .build(); PoolingHttpClientConnectionManager connManager = new PoolingHttpClientConnectionManager(socketFactoryRegistry); HttpClients.custom().setConnectionManager(connManager); //创建自定义的httpclient对象 CloseableHttpClient client = HttpClients.custom().setConnectionManager(connManager).build(); // CloseableHttpClient client = HttpClients.createDefault(); //创建post方式请求对象 HttpPost httpPost = new HttpPost(url); //装填参数 List<NameValuePair> nvps = new ArrayList<NameValuePair>(); if(map!=null){ for (Entry<String, String> entry : map.entrySet()) { nvps.add(new BasicNameValuePair(entry.getKey(), entry.getValue())); } } //设置参数到请求对象中 httpPost.setEntity(new UrlEncodedFormEntity(nvps, encoding)); System.out.println("请求地址："+url); System.out.println("请求参数："+nvps.toString()); //设置header信息 //指定报文头【Content-type】、【User-Agent】 httpPost.setHeader("Content-type", "application/x-www-form-urlencoded"); httpPost.setHeader("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)"); //执行请求操作，并拿到结果（同步阻塞） CloseableHttpResponse response = client.execute(httpPost); //获取结果实体 HttpEntity entity = response.getEntity(); if (entity != null) { //按指定编码转换结果实体为String类型 body = EntityUtils.toString(entity, encoding); } EntityUtils.consume(entity); //释放链接 response.close(); return body; } ~~~      现在再进行测试，发现果然通了。       下篇介绍另一种方案，应对自己生成的证书，敬请期待。