使用httpclient必须知道的参数设置及代码写法、存在的风险

参考：http://jinnianshilongnian.iteye.com/blog/2089792

 /** 
     *  
     * 方法名：createSSLClientDefault 
     * 作者：zhouyh 
     * 创建时间：2015-10-14 下午03:03:30 
     * 描述：针对https采用SSL的方式创建httpclient 
     * @return 
     */  
    public static CloseableHttpClient createSSLClientDefault(){       
        try {             
            SSLContext sslContext = new SSLContextBuilder().loadTrustMaterial(null, new TrustStrategy(){  
            //信任所有  
            public boolean isTrusted(X509Certificate[] chain, String authType) throws CertificateException {  
                return true;  
            }}).build();  
  
            SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslContext);  
  
            return HttpClients.custom().setSSLSocketFactory(sslsf).build();  
  
        } catch (KeyManagementException e) {  
            e.printStackTrace();  
        } catch (NoSuchAlgorithmException e) {  
            e.printStackTrace();  
        } catch (KeyStoreException e) {  
            e.printStackTrace();  
        }  
              
        return  HttpClients.createDefault();  
    }