序

本文简述一下怎么使用restTemplate来访问https。

maven

                
     
      org.apache.httpcomponents
                 
     
      httpclient
                 
     
      4.5.3
             
    

这里使用httpclient的factory

配置

@Bean    public RestTemplate restTemplate() throws KeyStoreException, NoSuchAlgorithmException, KeyManagementException {        TrustStrategy acceptingTrustStrategy = (X509Certificate[] chain, String authType) -> true;        SSLContext sslContext = org.apache.http.ssl.SSLContexts.custom()                .loadTrustMaterial(null, acceptingTrustStrategy)                .build();        SSLConnectionSocketFactory csf = new SSLConnectionSocketFactory(sslContext);        CloseableHttpClient httpClient = HttpClients.custom()                .setSSLSocketFactory(csf)                .build();        HttpComponentsClientHttpRequestFactory requestFactory =                new HttpComponentsClientHttpRequestFactory();        requestFactory.setHttpClient(httpClient);        RestTemplate restTemplate = new RestTemplate(requestFactory);        return restTemplate;    }

验证

@Test    public void testHttps(){        String url = "https://free-api.heweather.com/v5/forecast?city=CN101080101&key=5c043b56de9f4371b0c7f8bee8f5b75e";        String resp = restTemplate.getForObject(url, String.class);        System.out.println(resp);    }

doc