resttemplate 调用https 出错 unable to find valid certification path to requested target

resttemplate 调用https使用下面代码：

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

    @Bean
    public ClientHttpRequestFactory simpleClientHttpRequestFactory() {
        SimpleClientHttpRequestFactory factory = new SimpleClientHttpRequestFactory();
        //单位为ms
        factory.setReadTimeout(10 * 1000);
        //单位为ms
        factory.setConnectTimeout(30 * 1000);
        return factory;
    }

调用没有证书的https出现的错误

org.springframework.web.client.ResourceAccessException: I/O error on POST request for "https://gateway.fat.demo.com/service-commodity/providerInventory/queryInventory": sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target; nested exception is javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

修改为下面的java代码后，一切OK：

@Primary
    @Bean
    public RestTemplate restTemplate() {
        return new RestTemplate(generateHttpsRequestFactory());
    }

    public HttpComponentsClientHttpRequestFactory generateHttpsRequestFactory() {
        try {
            TrustStrategy acceptingTrustStrategy = (x509Certificates, authType) -> true;
            SSLContext sslContext = SSLContexts.custom().loadTrustMaterial(null, acceptingTrustStrategy).build();
            SSLConnectionSocketFactory connectionSocketFactory =
                    new SSLConnectionSocketFactory(sslContext, new NoopHostnameVerifier());

            HttpClientBuilder httpClientBuilder = HttpClients.custom();
            httpClientBuilder.setSSLSocketFactory(connectionSocketFactory);
            CloseableHttpClient httpClient = httpClientBuilder.build();
            HttpComponentsClientHttpRequestFactory factory = new HttpComponentsClientHttpRequestFactory();
            factory.setHttpClient(httpClient);
            factory.setConnectTimeout(10 * 1000);
            factory.setReadTimeout(30 * 1000);
            return factory;
        } catch (Exception e) {
            log.error("创建HttpsRestTemplate失败", e);
            throw new RuntimeException("创建HttpsRestTemplate失败", e);
        }

    }