Java爬虫--Https绕过证书

　　https网站服务器都是有证书的。 是由网站自己的服务器签发的，并不被浏览器或操作系统广泛接受。

　　在使用CloseableHttpClient时经常遇到证书错误(知乎的网站就是这样)

　　现在需要SSL绕过证书，下面直接贴出代码，调用时只需要在发送请求后  new  HttpsBerBer(文件的字节码) ;

 import javax.net.ssl.HostnameVerifier;
 import javax.net.ssl.HttpsURLConnection;
 import javax.net.ssl.SSLSession;
 import java.util.logging.Logger;

 public class HttpsBerBer {
     public HttpsBerBer(String name) throws Exception {
         logger = Logger.getLogger(name);
         trustAllHttpsCertificates();
         HostnameVerifier hv = new HostnameVerifier() {
             public boolean verify(String urlHostName, SSLSession session) {
                 logger.info("Warning: URL Host: " + urlHostName + " vs. " + session.getPeerHost());
                 return true;
             }
         };
         HttpsURLConnection.setDefaultHostnameVerifier(hv);
     }
     private static Logger logger ;
     private static void trustAllHttpsCertificates() throws Exception {
         javax.net.ssl.TrustManager[] trustAllCerts = new javax.net.ssl.TrustManager[1];
         javax.net.ssl.TrustManager tm = new miTM();
         trustAllCerts[0] = tm;
         javax.net.ssl.SSLContext sc = javax.net.ssl.SSLContext
                 .getInstance("SSL");
         sc.init(null, trustAllCerts, null);
         javax.net.ssl.HttpsURLConnection.setDefaultSSLSocketFactory(sc
                 .getSocketFactory());
     }
     static class miTM implements javax.net.ssl.TrustManager,
             javax.net.ssl.X509TrustManager {
         public java.security.cert.X509Certificate[] getAcceptedIssuers() {
             return null;
         }

         public boolean isServerTrusted(
                 java.security.cert.X509Certificate[] certs) {
             return true;
         }

         public boolean isClientTrusted(
                 java.security.cert.X509Certificate[] certs) {
             return true;
         }

         public void checkServerTrusted(
                 java.security.cert.X509Certificate[] certs, String authType)
                 throws java.security.cert.CertificateException {
             return;
         }

         public void checkClientTrusted(
                 java.security.cert.X509Certificate[] certs, String authType)
                 throws java.security.cert.CertificateException {
             return;
         }
     }
 }