下面是针对apache httpclient 4.5.11的解决方案。我有问题与cert的主题通配符*.hostname.com。它返回了我同样的异常，但我不能使用属性System.setProperty(“jsse。enableSNIExtension”、“假”);因为它在谷歌位置客户端出错。

我找到了简单的解决方案(只修改socket):

import io.micronaut.context.annotation.Bean;
import io.micronaut.context.annotation.Factory;
import org.apache.http.client.HttpClient;
import org.apache.http.conn.ssl.NoopHostnameVerifier;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.ssl.SSLContexts;

import javax.inject.Named;
import javax.net.ssl.SSLParameters;
import javax.net.ssl.SSLSocket;
import java.io.IOException;
import java.util.List;

@Factory
public class BeanFactory {

    @Bean
    @Named("without_verify")
    public HttpClient provideHttpClient() {
        SSLConnectionSocketFactory connectionSocketFactory = new SSLConnectionSocketFactory(SSLContexts.createDefault(), NoopHostnameVerifier.INSTANCE) {
            @Override
            protected void prepareSocket(SSLSocket socket) throws IOException {
                SSLParameters parameters = socket.getSSLParameters();
                parameters.setServerNames(List.of());
                socket.setSSLParameters(parameters);
                super.prepareSocket(socket);
            }
        };

        return HttpClients.custom()
                .setSSLSocketFactory(connectionSocketFactory)
                .build();
    }


}

它应该是有用的。在Apache HttpClient 4.4中重试SNI错误-我们提出的最简单的方法(参见HttpClient -1522):

public class SniHttpClientConnectionOperator extends DefaultHttpClientConnectionOperator {

    public SniHttpClientConnectionOperator(Lookup<ConnectionSocketFactory> socketFactoryRegistry) {
        super(socketFactoryRegistry, null, null);
    }

    @Override
    public void connect(
            final ManagedHttpClientConnection conn,
            final HttpHost host,
            final InetSocketAddress localAddress,
            final int connectTimeout,
            final SocketConfig socketConfig,
            final HttpContext context) throws IOException {
        try {
            super.connect(conn, host, localAddress, connectTimeout, socketConfig, context);
        } catch (SSLProtocolException e) {
            Boolean enableSniValue = (Boolean) context.getAttribute(SniSSLSocketFactory.ENABLE_SNI);
            boolean enableSni = enableSniValue == null || enableSniValue;
            if (enableSni && e.getMessage() != null && e.getMessage().equals("handshake alert:  unrecognized_name")) {
                TimesLoggers.httpworker.warn("Server received saw wrong SNI host, retrying without SNI");
                context.setAttribute(SniSSLSocketFactory.ENABLE_SNI, false);
                super.connect(conn, host, localAddress, connectTimeout, socketConfig, context);
            } else {
                throw e;
            }
        }
    }
}

and

public class SniSSLSocketFactory extends SSLConnectionSocketFactory {

    public static final String ENABLE_SNI = "__enable_sni__";

    /*
     * Implement any constructor you need for your particular application -
     * SSLConnectionSocketFactory has many variants
     */
    public SniSSLSocketFactory(final SSLContext sslContext, final HostnameVerifier verifier) {
        super(sslContext, verifier);
    }

    @Override
    public Socket createLayeredSocket(
            final Socket socket,
            final String target,
            final int port,
            final HttpContext context) throws IOException {
        Boolean enableSniValue = (Boolean) context.getAttribute(ENABLE_SNI);
        boolean enableSni = enableSniValue == null || enableSniValue;
        return super.createLayeredSocket(socket, enableSni ? target : "", port, context);
    }
}

and

cm = new PoolingHttpClientConnectionManager(new SniHttpClientConnectionOperator(socketFactoryRegistry), null, -1, TimeUnit.MILLISECONDS);

有一种更简单的方法，您可以使用自己的HostnameVerifier隐式信任某些连接。问题来自Java 1.7，其中添加了SNI扩展，而您的错误是由于服务器配置错误造成的。

你可以用“-Djsse”。enableSNIExtension=false”在整个JVM上禁用SNI或阅读我的博客，我解释了如何在URL连接上实现自定义验证器。

如果您正在使用Resttemplate构建客户端，您只能像这样设置端点:https://IP/path_to_service并设置requestFactory。 使用这个解决方案，您不需要重新启动TOMCAT或Apache:

public static HttpComponentsClientHttpRequestFactory requestFactory(CloseableHttpClient httpClient) {
    TrustStrategy acceptingTrustStrategy = new TrustStrategy() {
        @Override
        public boolean isTrusted(X509Certificate[] chain, String authType) throws CertificateException {
            return true;
        }
    };

    SSLContext sslContext = null;
    try {
        sslContext = org.apache.http.ssl.SSLContexts.custom()
                .loadTrustMaterial(null, acceptingTrustStrategy)
                .build();
    } catch (Exception e) {
        logger.error(e.getMessage(), e);
    }   

    HostnameVerifier hostnameVerifier = new HostnameVerifier() {
        @Override
        public boolean verify(String hostname, SSLSession session) {
            return true;
        }
    };

    final SSLConnectionSocketFactory csf = new SSLConnectionSocketFactory(sslContext,hostnameVerifier);

    final Registry<ConnectionSocketFactory> registry = RegistryBuilder.<ConnectionSocketFactory>create()
            .register("http", new PlainConnectionSocketFactory())
            .register("https", csf)
            .build();

    final PoolingHttpClientConnectionManager cm = new PoolingHttpClientConnectionManager(registry);
    cm.setMaxTotal(100);
    httpClient = HttpClients.custom()
            .setSSLSocketFactory(csf)
            .setConnectionManager(cm)
            .build();

    HttpComponentsClientHttpRequestFactory requestFactory =
            new HttpComponentsClientHttpRequestFactory();

    requestFactory.setHttpClient(httpClient);

    return requestFactory;
}

在spring引导和jvm 1.7和1.8时遇到了这个问题。在AWS上，我们没有选项来更改serververname和ServerAlias来匹配(它们是不同的)，所以我们做了以下工作:

在构建。Gradle我们添加了以下内容:

System.setProperty("jsse.enableSNIExtension", "false")
bootRun.systemProperties = System.properties

这让我们绕过了“无法识别的名字”的问题。

下面是针对apache httpclient 4.5.11的解决方案。我有问题与cert的主题通配符*.hostname.com。它返回了我同样的异常，但我不能使用属性System.setProperty(“jsse。enableSNIExtension”、“假”);因为它在谷歌位置客户端出错。

我找到了简单的解决方案(只修改socket):

import io.micronaut.context.annotation.Bean;
import io.micronaut.context.annotation.Factory;
import org.apache.http.client.HttpClient;
import org.apache.http.conn.ssl.NoopHostnameVerifier;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.ssl.SSLContexts;

import javax.inject.Named;
import javax.net.ssl.SSLParameters;
import javax.net.ssl.SSLSocket;
import java.io.IOException;
import java.util.List;

@Factory
public class BeanFactory {

    @Bean
    @Named("without_verify")
    public HttpClient provideHttpClient() {
        SSLConnectionSocketFactory connectionSocketFactory = new SSLConnectionSocketFactory(SSLContexts.createDefault(), NoopHostnameVerifier.INSTANCE) {
            @Override
            protected void prepareSocket(SSLSocket socket) throws IOException {
                SSLParameters parameters = socket.getSSLParameters();
                parameters.setServerNames(List.of());
                socket.setSSLParameters(parameters);
                super.prepareSocket(socket);
            }
        };

        return HttpClients.custom()
                .setSSLSocketFactory(connectionSocketFactory)
                .build();
    }


}