HttpURLConnection绕过SSL验证，信任所有证书的工具类

HttpURLConnection绕过SSL验证，信任所有证书的工具类

发起https请求时经常会出现javax.net.ssl.SSLHandshakeException: java.security.cert.CertificateException这样的错误，那是因为环境中没有证书校验，我们可以在连接中设置绕过SSL校验来解决这个问题。

public class SslUtil {

    // 针对全局
    public static void trustAllHttpsCertificates() throws NoSuchAlgorithmException, KeyManagementException {
        TrustManager[] trustAllCerts = new TrustManager[1];
        trustAllCerts[0] = new TrustAllManager();
        SSLContext sc = SSLContext.getInstance("SSL");
        sc.init(null, trustAllCerts, null);
        HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
        HttpsURLConnection.setDefaultHostnameVerifier(new HostnameVerifier() {
            @Override
            public boolean verify(String urlHostName, SSLSession session) {
                return true;
            }
        });
    }

    // 针对单个连接
    public static void trustAllHttpsCertificates(URLConnection connection) throws NoSuchAlgorithmException, KeyManagementException {
        HttpsURLConnection httpsURLConnection = (HttpsURLConnection) connection;
        TrustManager[] trustAllCerts = new TrustManager[1];
        trustAllCerts[0] = new TrustAllManager();
        SSLContext sc = SSLContext.getInstance("SSL");
        sc.init(null, trustAllCerts, null);
        httpsURLConnection.setSSLSocketFactory(sc.getSocketFactory());
        httpsURLConnection.setHostnameVerifier(new HostnameVerifier() {
            @Override
            public boolean verify(String urlHostName, SSLSession session) {
                return true;
            }
        });
    }

    private static class TrustAllManager implements X509TrustManager {

        @Override
        public X509Certificate[] getAcceptedIssuers() {
            return null;
        }

        @Override
        public void checkServerTrusted(X509Certificate[] certs, String authType) throws CertificateException {
        }

        @Override
        public void checkClientTrusted(X509Certificate[] certs, String authType) throws CertificateException {
        }
    }
}