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);
}

}