转自:

http://www.java265.com/JavaCourse/202204/2939.html

HttpClient是一个java语言编写的包，

我们使用HttpClient可以非常方便的发送Http请求

它使基于Http协议请求内容变得非常简单

HttpClient是Apache Jakarta Common下的子项目 它里面封装了很多使用http协议访问的工具，可用于高效访问http

下文笔者讲述基于HttpClient进行ss的示例分享，如下所示:

HttpClient进行ssl连接的示例分享，如下所示
实现思路:
    1.定义一个keyStore对象，并读取证书信息
	2.声明一个SSLContext
	3.定义一个SSLConnectionSocketFactory工厂
	4.定义一个HttpGet请求体 
	5.execute执行运行
	6.获取返回信息
	7.关闭连接

  /** 
     * HttpClient连接SSL 
     */   
    public void ssl() {   
        CloseableHttpClient httpclient = null;   
        try {   
            KeyStore trustStore = KeyStore.getInstance(KeyStore.getDefaultType());   
            FileInputStream instream = new FileInputStream(new File("d:\\tomcat.keystore"));   
            try {   
                // 加载keyStore d:\\tomcat.keystore     
                trustStore.load(instream, "123456".toCharArray());   
            } catch (CertificateException e) {   
                e.printStackTrace();   
            } finally {   
                try {   
                    instream.close();   
                } catch (Exception ignore) {   
                }   
            }   
            // 相信自己的CA和所有自签名的证书   
            SSLContext sslcontext = SSLContexts.custom().loadTrustMaterial(trustStore, new TrustSelfSignedStrategy()).build();   
            // 只允许使用TLSv1协议   
            SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslcontext, new String[] { "TLSv1" }, null,   
                    SSLConnectionSocketFactory.BROWSER_COMPATIBLE_HOSTNAME_VERIFIER);   
            httpclient = HttpClients.custom().setSSLSocketFactory(sslsf).build();   
            // 创建http请求(get方式)   
            HttpGet httpget = new HttpGet("https://www.java265.com");   
            System.out.println("executing request" + httpget.getRequestLine());   
            CloseableHttpResponse response = httpclient.execute(httpget);   
            try {   
                HttpEntity entity = response.getEntity();   
                System.out.println("----------------------------------------");   
                System.out.println(response.getStatusLine());   
                if (entity != null) {   
                    System.out.println("Response content length: " + entity.getContentLength());   
                    System.out.println(EntityUtils.toString(entity));   
                    EntityUtils.consume(entity);   
                }   
            } finally {   
                response.close();   
            }   
        } catch (ParseException e) {   
            e.printStackTrace();   
        } catch (IOException e) {   
            e.printStackTrace();   
        } catch (KeyManagementException e) {   
            e.printStackTrace();   
        } catch (NoSuchAlgorithmException e) {   
            e.printStackTrace();   
        } catch (KeyStoreException e) {   
            e.printStackTrace();   
        } finally {   
            if (httpclient != null) {   
                try {   
                    httpclient.close();   
                } catch (IOException e) {   
                    e.printStackTrace();   
                }   
            }   
        }   
    } 

参考资料:http://www.java265.com/JavaCourse/202204/2934.html HttpUtils工具类