1.使用HttpURLConnection发送请求

private static void trustAllCertificates(HttpURLConnection con) throws NoSuchAlgorithmException, KeyManagementException {((HttpsURLConnection) con).setHostnameVerifier(new HostnameVerifier() {public boolean verify(String hostname, SSLSession session) {return true;}});// Ignore CertificationTrustManager ignoreCertificationTrustManger = new X509TrustManager() {public void checkClientTrusted(X509Certificate certificates[], String authType) throws CertificateException {}public void checkServerTrusted(X509Certificate[] ax509certificate, String s) throws CertificateException {}public X509Certificate[] getAcceptedIssuers() {return null;}};// Prepare SSL ContextTrustManager[] tm = { ignoreCertificationTrustManger };SSLContext sslContext = SSLContext.getInstance("SSL");sslContext.init(null, tm, new java.security.SecureRandom());// 从上述SSLContext对象中得到SSLSocketFactory对象SSLSocketFactory ssf = sslContext.getSocketFactory();((HttpsURLConnection) con).setSSLSocketFactory(ssf);}

在发送请求时，在HttpURLConnection声明后调用上述方法，如下：

HttpURLConnection connection = (HttpURLConnection) postURL.openConnection();
trustAllCertificates(connection);

2.使用HttpClient 发送请求

    public static HttpClient create() throws KeyManagementException, NoSuchAlgorithmException {// 创建一个信任所有证书的TrustManagerTrustManager[] trustAllCerts = new TrustManager[]{new X509TrustManager() {public java.security.cert.X509Certificate[] getAcceptedIssuers() {return null;}public void checkClientTrusted(java.security.cert.X509Certificate[] certs, String authType) {}public void checkServerTrusted(java.security.cert.X509Certificate[] certs, String authType) {}}};// 初始化SSLContextSSLContext sslContext = SSLContext.getInstance("SSL");sslContext.init(null, trustAllCerts, new SecureRandom());// 创建使用我们SSLContext的SSLConnectionSocketFactorySSLConnectionSocketFactory sslSocketFactory = new SSLConnectionSocketFactory(sslContext, SSLConnectionSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);// 创建配置了我们SSLConnectionSocketFactory的HttpClientHttpClient httpClient = HttpClients.custom().setSSLSocketFactory(sslSocketFactory).build();return httpClient;}

调用时如下，用上述方法声明 HttpClient即可：

HttpClient httpClient = create();
或者
CloseableHttpClient httpClient = (CloseableHttpClient)create();