RestTemplate 发送Post请求，url查询参数和json参数
public void postRequest(String url) {
// 设置超时时间
SimpleClientHttpRequestFactory requestFactory = new SimpleClientHttpRequestFactory();
requestFactory.setReadTimeout(30 * 1000);
requestFactory.setConnectTimeout(30 * 1000);
RestTemplate restTemplate = new RestTemplate(requestFactory);
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_JSON);
// 组装body参数
Map body = new HashMap();
body.put("1", "1");
body.put("2", "2");
// 将map转为json串，放入restTemplate的参数对象中
String bodyJsonData = JSON.toJSONString(body);
HttpEntity<String> request = new HttpEntity<>(bodyJsonData, headers);
// 组装url参数 ?username=zhangsan&age=20&sex=男
MultiValueMap<String, String> queryMap = new LinkedMultiValueMap<>();
queryMap.add("username", "zhangsan");
queryMap.add("age", "20");
queryMap.add("sex", "男");
// 将参数拼入请求url中
UriComponentsBuilder builder = UriComponentsBuilder.fromHttpUrl(url).queryParams(queryMap);
// 发起请求
ResponseEntity<JSONObject> responseEntity = restTemplate.postForEntity(builder.toUriString(), request, JSONObject.class);
System.out.println(builder.toUriString());
System.out.println(responseEntity);
}