resttemplate 調用https 出錯 unable to find valid certification path to requested target

resttemplate 調用https使用下面代碼：

1.  
   @Bean
2.  
   @Primary
3.  
   public RestTemplate restTemplate(ClientHttpRequestFactory httpRequestFactory) {
4.  
   return new RestTemplate(httpRequestFactory);
5.  
   }
6.  
    
7.  
   @Bean
8.  
   public ClientHttpRequestFactory simpleClientHttpRequestFactory() {
9.  
   SimpleClientHttpRequestFactory factory = new SimpleClientHttpRequestFactory();
10.  
    //單位為ms
11.  
    factory.setReadTimeout( 10 * 1000);
12.  
    //單位為ms
13.  
    factory.setConnectTimeout( 30 * 1000);
14.  
    return factory;
15.  
    }

調用沒有證書的https出現的錯誤

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

修改為下面的java代碼后，一切OK：

1.  
   @Primary
2.  
   @Bean
3.  
   public RestTemplate restTemplate() {
4.  
   return new RestTemplate(generateHttpsRequestFactory());
5.  
   }
6.  
    
7.  
   public HttpComponentsClientHttpRequestFactory generateHttpsRequestFactory() {
8.  
   try {
9.  
   TrustStrategy acceptingTrustStrategy = (x509Certificates, authType) -> true;
10.  
    SSLContext sslContext = SSLContexts.custom().loadTrustMaterial( null, acceptingTrustStrategy).build();
11.  
    SSLConnectionSocketFactory connectionSocketFactory =
12.  
    new SSLConnectionSocketFactory(sslContext, new NoopHostnameVerifier());
13.  
     
14.  
    HttpClientBuilder httpClientBuilder = HttpClients.custom();
15.  
    httpClientBuilder.setSSLSocketFactory(connectionSocketFactory);
16.  
    CloseableHttpClient httpClient = httpClientBuilder.build();
17.  
    HttpComponentsClientHttpRequestFactory factory = new HttpComponentsClientHttpRequestFactory();
18.  
    factory.setHttpClient(httpClient);
19.  
    factory.setConnectTimeout( 10 * 1000);
20.  
    factory.setReadTimeout( 30 * 1000);
21.  
    return factory;
22.  
    } catch (Exception e) {
23.  
    log.error( "創建HttpsRestTemplate失敗", e);
24.  
    throw new RuntimeException("創建HttpsRestTemplate失敗", e);
25.  
    }
26.  
     
27.  
    }

28.