PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to fin

openssl s_client -connect <服務(wù)器地址>:443 -showcerts

keytool -import -trustcacerts -file <證書(shū)文件> -keystore $JAVA_HOME/lib/security/cacerts -alias <別名>

import org.apache.hc.client5.http.impl.classic.CloseableHttpClient;
import org.apache.hc.client5.http.impl.classic.HttpClients;
import org.apache.hc.client5.http.impl.io.PoolingHttpClientConnectionManagerBuilder;
import org.apache.hc.client5.http.ssl.NoopHostnameVerifier;
import org.apache.hc.client5.http.ssl.SSLConnectionSocketFactoryBuilder;
import org.apache.hc.client5.http.ssl.TrustAllStrategy;
import org.apache.hc.core5.ssl.SSLContextBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.client.ClientHttpRequestFactory;
import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
import org.springframework.web.client.RestTemplate;

import java.security.KeyManagementException;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;


@Configuration
public class RestTemplateConfig {

    @Bean
    public RestTemplate restTemplate(ClientHttpRequestFactory factory) {
        return new RestTemplate(factory);
    }

    @Bean
    public ClientHttpRequestFactory simpleClientHttpRequestFactory() throws Exception {
        HttpComponentsClientHttpRequestFactory factory = generateHttpRequestFactory();
        factory.setConnectTimeout(15000);
        factory.setConnectionRequestTimeout(5000);
        return factory;
    }

    /**
     * 構(gòu)造跳過(guò)SSL ClientHttp工廠(chǎng)
     *
     * @return
     * @throws NoSuchAlgorithmException
     * @throws KeyManagementException
     * @throws KeyStoreException
     */
    public static HttpComponentsClientHttpRequestFactory generateHttpRequestFactory()
            throws NoSuchAlgorithmException, KeyManagementException, KeyStoreException {
        CloseableHttpClient httpclient = HttpClients.custom()
                .setConnectionManager(PoolingHttpClientConnectionManagerBuilder.create()
                        .setSSLSocketFactory(SSLConnectionSocketFactoryBuilder.create()
                                .setSslContext(SSLContextBuilder.create()
                                        .loadTrustMaterial(TrustAllStrategy.INSTANCE)
                                        .build())
                                .setHostnameVerifier(NoopHostnameVerifier.INSTANCE)
                                .build())
                        .build())
                .build();
        HttpComponentsClientHttpRequestFactory factory = new HttpComponentsClientHttpRequestFactory();
        factory.setHttpClient(httpclient);
        return factory;
    }
}