HttpClient如何進行ssl連接呢？

轉自:

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

HttpClient是一個java語言撰寫的包，

我們使用HttpClient可以非常方便的發送Http請求

它使基于Http協議請求內容變得非常簡單

HttpClient是Apache Jakarta Common下的子專案 它里面封裝了很多使用http協議訪問的工具，可用于高效訪問http

下文筆者講述基于HttpClient進行ss的示例分享，如下所示:

HttpClient進行ssl連接的示例分享，如下所示
實作思路:
    1.定義一個keyStore物件，并讀取證書資訊
	2.宣告一個SSLContext
	3.定義一個SSLConnectionSocketFactory工廠
	4.定義一個HttpGet請求體 
	5.execute執行運行
	6.獲取回傳資訊
	7.關閉連接

  /** 
     * HttpClient連接SSL 
     */   
    public void ssl() {   
        CloseableHttpClient httpclient = null;   
        try {   
            KeyStore trustStore = KeyStore.getInstance(KeyStore.getDefaultType());   
            FileInputStream instream = new FileInputStream(new File("d:\\tomcat.keystore"));   
            try {   
                // 加載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和所有自簽名的證書   
            SSLContext sslcontext = SSLContexts.custom().loadTrustMaterial(trustStore, new TrustSelfSignedStrategy()).build();   
            // 只允許使用TLSv1協議   
            SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslcontext, new String[] { "TLSv1" }, null,   
                    SSLConnectionSocketFactory.BROWSER_COMPATIBLE_HOSTNAME_VERIFIER);   
            httpclient = HttpClients.custom().setSSLSocketFactory(sslsf).build();   
            // 創建http請求(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();   
                }   
            }   
        }   
    } 

參考資料:http://www.java265.com/JavaCourse/202204/2934.html HttpUtils工具類

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