restTemplate使用总结

1、配置类

@Configuration
public class RestTemplateConfig() {@Beanpublic RestTemplate restTemplate(ClientHttpRequestFactory factory) {return new RestTemplate(factory);}@Beanpublic ClientHttpRequestFactory simpleClientHttpRequestFactory() {HttpComponentsClientHttpRequestFactory factory = new HttpComponentsClientHttpRequestFactory();factory.setConnectTimeout(300000);factory.setReadTimeout(300000);return factory;}
}

实际使用时可以生成不同的factory

// 不进行证书校验
RestTemplate restTemplateHttps = new RestTemplate(RestTemplateConfig.generateHttpRequestFactory());public static HttpComponentsClientHttpRequestFactory generateHttpRequestFactory()throws NoSuchAlgorithmException, KeyManagementException, KeyStoreException {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);return factory;}

2、发送请求

（1）restTemplate.exchange

// get
HttpEntity<MyDTO> httpEntity = new HttpEntity<>(inputBody,headers)
ResponseEntity<Map> exchange = restTemplate.exchange(url,HttpMethod.GET,httpEntity,Map.class)// Post
HttpEntity<Map<String, Object>> httpEntity = new HttpEntity<Map<String, Object>>(params, headers);ResponseEntity<refreshUeResultDTO> ret = restTemplate.exchange(restfulUrl, HttpMethod.POST, httpEntity,refreshUeResultDTO.class);

(2) restTemplate.getForEntity

ResponseEntity<String> ret = restTemplate.getForEntity(restful, String.class, new HashMap<>());

getForEntity没法直接携带header

(3)restTemplate.postForEntity

HttpEntity<EspaceMessageDTO> httpEntity = new HttpEntity<>(espaceMessageDTO,headers);ResponseEntity<Object> res = restTemplate.postForEntity(url,httpEntity, Object.class);

(4)接收的类带泛型

ResponseEntity<List<RundeckTaskDO>> result = restTemplate.exchange(restful, HttpMethod.GET, entity, new ParameterizedTypeReference<List<RundeckTaskDO>>() {});