restTemplate 访问某些网站的时候碰到 unable to find valid certification path to requested target

查了下有不少解决办法

但是感觉最简单而且不需要引入更多依赖的办法如下

public final class SSLUtil{

  private static final TrustManager[] UNQUESTIONING_TRUST_MANAGER = new TrustManager[]{
      new X509TrustManager() {
        public java.security.cert.X509Certificate[] getAcceptedIssuers(){
          return null;
        }
        public void checkClientTrusted( X509Certificate[] certs, String authType ){}
        public void checkServerTrusted( X509Certificate[] certs, String authType ){}
      }
  };

  public  static void turnOffSslChecking() throws NoSuchAlgorithmException, KeyManagementException {
    // Install the all-trusting trust manager
    final SSLContext sc = SSLContext.getInstance("SSL");
    sc.init( null, UNQUESTIONING_TRUST_MANAGER, null );
    HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
  }

  public static void turnOnSslChecking() throws KeyManagementException, NoSuchAlgorithmException {
    // Return it to the initial state (discovered by reflection, now hardcoded)
    SSLContext.getInstance("SSL").init( null, null, null );
  }

  private SSLUtil(){
    throw new UnsupportedOperationException( "Do not instantiate libraries.");
  }
}

然后在你需要关闭ssl检查的时候调用SSUTil.turnOffSslChecking()就OK了

感谢谷歌和* 这个方法原载在*上