Java 绕过Http安全证书认证的方式

web项目不免会用上Http请求有些地址没有安全证书，Java默认是不能访问这些地址的，通常的方法是忽略安全证书，网上查了一圈，看似不少资料，但我却没找到一个拿来就能够用的，最后整合了网上的信息，弄出来一个可用的，我也不肯定我这个是否是通用的， 毕竟其实都还不太清楚原理。只是记录一下：

//忽略安全证书认证的链接方式
    private static RestTemplate ignoreSSL() throws KeyStoreException, NoSuchAlgorithmException, KeyManagementException {

        TrustStrategy acceptingTrustStrategy = (X509Certificate[] chain, String authType) -> true;

        SSLContext sslContext = org.apache.http.ssl.SSLContexts.custom()
                .loadTrustMaterial(null, new TrustSelfSignedStrategy())
                .build();

        SSLConnectionSocketFactory csf = new SSLConnectionSocketFactory(sslContext, NoopHostnameVerifier.INSTANCE);

        CloseableHttpClient httpClient = HttpClients.custom()
                .setSSLSocketFactory(csf)
                .build();

        HttpComponentsClientHttpRequestFactory requestFactory =
                new HttpComponentsClientHttpRequestFactory();

        requestFactory.setHttpClient(httpClient);

        return new RestTemplate(requestFactory);
    }