1、引入依赖
<dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency><groupId>org.apache.httpcomponents</groupId><artifactId>httpclient</artifactId>
</dependency>
2、配置restTemplate
@Bean
public RestTemplate getRestTemplate() {try {// 配置后可以使用 httpsTrustStrategy acceptingTrustStrategy = (x509Certificates, em) -> true;SSLContext sslContext = org.apache.http.ssl.SSLContexts.custom().loadTrustMaterial(null, acceptingTrustStrategy).build();SSLConnectionSocketFactory csf = new SSLConnectionSocketFactory(sslContext, new NoopHostnameVerifier());CloseableHttpClient httpClient = HttpClients.custom().setSSLSocketFactory(csf).build();HttpComponentsClientHttpRequestFactory requestFactory = new HttpComponentsClientHttpRequestFactory();requestFactory.setHttpClient(httpClient);return new RestTemplate(requestFactory);} catch (Exception e) {log.error("getRestTemplate error.", e);}return new RestTemplate();
}
2、创建工具类
@Component
public class RestUtils {@Autowiredprivate RestTemplate restTemplate;/*** 发送 get 请求* 默认：客户端接受 json 类型数据*/public <T> T get(String url, Class<T> responseType) {// 设置默认请求头Map<String, String> httpHeaderMap = new HashMap<>();httpHeaderMap.put(HttpHeaders.ACCEPT, MediaType.APPLICATION_JSON_VALUE);return sendRequest(url, HttpMethod.GET, null, responseType, httpHeaderMap);}/*** 发送 post 请求* 默认：服务器接受 json 类型数据，客户端接受 json 类型数据*/public <T> T post(String url, Object requestBody, Class<T> responseType) {Map<String, String> httpHeaderMap = new HashMap<>();httpHeaderMap.put(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE);httpHeaderMap.put(HttpHeaders.ACCEPT, MediaType.APPLICATION_JSON_VALUE);return sendRequest(url, HttpMethod.POST, requestBody, responseType, httpHeaderMap);}/*** 发送请求* @param method 请求方式*/public <T> T sendRequest(String url, HttpMethod method, Object requestBody, Class<T> responseType, Map<String, String> httpHeaderMap) {HttpHeaders headers = new HttpHeaders();// 设置请求头httpHeaderMap.keySet().forEach(key -> {headers.add(key,httpHeaderMap.get(key));});HttpEntity<Object> entity = new HttpEntity<>(requestBody, headers);return restTemplate.exchange(url, method, entity, responseType).getBody();}/*** 在 url 后面拼接参数* @param url 原请求路径* @param paramMap 参数map*/public String getParamUrl(String url, Map<String, String> paramMap) {StringBuilder sb = new StringBuilder(url);if (paramMap != null && !paramMap.isEmpty()) {sb.append("?");for (Map.Entry<String, String> entry : paramMap.entrySet()) {String key = entry.getKey();String value = entry.getValue();sb.append(key).append("=").append(value).append("&");}sb.deleteCharAt(sb.length() - 1); // 移除最后一个多余的"&"}return sb.toString();}
}