I /关于“URL” POST请求O错误：连接被拒绝

Question

我调用外部系统与其他模板，它的工作在我的本地罚款没有任何超时设置，但我的测试服务器上，它给我下面的错误：

关于 “https://externalsystem/url” POST请求I / O错误：连接被拒绝：连接;嵌套的例外是java.net.ConnectException：连接被拒绝：连接

RestTemplate restTemplate = new RestTemplate();
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_FORM_URLENCODED);
MultiValueMap<String, String> map = new LinkedMultiValueMap<String, String>();
HttpEntity<MultiValueMap<String, String>> request = new 
HttpEntity<MultiValueMap<String, String>>(map, headers);
map.add("key", value);      
restTemplate.postForEntity(url, request, String.class);

Answer 1

这当然是一个防火墙问题尝试设置主机代理和港口，像这样：

System.setProperty("proxyHost", "yourproxy.server");
System.setProperty("proxyPort", "portValue");

Answer 2

我收到这个问题上JRE1.7但JDK的罚款8步骤来解决此问题

1. 更新JCE与UnlimitedJCEPolicyJDK7。从Oracle的Java网站上下载 - http://www.oracle.com/technetwork/java/javase/downloads/jce-7-download-432124.html
2. 包括jar文件的HttpClient-4.5.2.jar和的HttpCore-4.4.4.jar
3. 使用下面的代码getRestTemplate：

   public static RestTemplate getRestTemplate()
           throws KeyStoreException, NoSuchAlgorithmException, KeyManagementException {
       //TrustStrategy acceptingTrustStrategy = (X509Certificate[] chain, String authType) -> true;
   
       TrustStrategy acceptingTrustStrategy = new TrustStrategy() {
   
           public boolean isTrusted(
                   final X509Certificate[] chain, String authType) throws CertificateException {
               // Oh, I am easy...
               return true;
           }
   
       };
   
       SSLContext sslContext = org.apache.http.ssl.SSLContexts.custom().loadTrustMaterial(null, acceptingTrustStrategy)
               .build();
   
       //SSLConnectionSocketFactory csf = new SSLConnectionSocketFactory(sslContext);
   
       SSLConnectionSocketFactory csf = new SSLConnectionSocketFactory(
               sslContext,new String[]{"TLSv1.2"},
               null,
               new NoopHostnameVerifier());
   
       CloseableHttpClient httpClient = HttpClients.custom().setSSLSocketFactory(csf).build();
   
       HttpComponentsClientHttpRequestFactory requestFactory = new HttpComponentsClientHttpRequestFactory();
       /*HttpComponentsClientHttpRequestFactory requestFactory 
       = new HttpComponentsClientHttpRequestFactory(
           HttpClientBuilder.create()
                   .setProxy(new HttpHost("proxycacheST.hewitt.com", 3228, "http"))
                   .build());*/
   
       requestFactory.setHttpClient(httpClient);
       RestTemplate restTemplate = new RestTemplate(requestFactory);
       return restTemplate;
   }

   步骤4：调用restTemplate.exchange（resturl，HttpMethod.POST，NULL，String.class）; 希望它会得到正确的结果