使用restTemplate来访问https-优快云博客

本文介绍如何使用Maven依赖管理和Spring的RestTemplate配置，实现HTTPS接口无证书验证访问。通过自定义SSLContext和SSLConnectionSocketFactory，创建信任所有证书的SSL连接，解决HTTPS请求时的信任问题。

1、maven： <dependency>

　　　　　　　　<groupId>org.apache.httpcomponents</groupId>

　　　　　　　　<artifactId>httpclient</artifactId>

　　　　　　　　<version>4.5.3</version>

　　　　　　</dependency>

2、@Configuration
public class RestTemplateConfig {

@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;
}
}

测试：

public String getData()
    {
//接口地址
        String url = "https://free-api.heweather.com/v5/forecast?city=CN101080101&key=5c043b56de9f4371b0c7f8bee8f5b75e";
        Map<String, Object> params = new HashMap<>();
        params.put("start_time", "20180824");
        params.put("end_time", "20180827");
       // RestTemplate restTemplate = new RestTemplate();//此处直接autowire即可，不用new
        HttpEntity httpEntity = new HttpEntity(params, null);
        ResponseEntity<String> request = restTemplate.postForEntity(url, httpEntity, String.class);
return request.getBody().toString();
    }