RestTemplate请求使用方法

• 获取restTemplate对象
• 封装请求头
• 封装请求参数
• 发起请求
• 获取返回值

获取restTemplate对象

1 RestTemplate restTemplate=new RestTemplate();

封装请求头

 HttpHeaders requestHeaders = new HttpHeaders();
//添加session
List<String> cookieLists =new ArrayList<String>();
String sessionStr="9338116b-a933-475b-aa4f-d785e9923125";
cookieLists.add("SESSION="+sessionStr);
requestHeaders.put(HttpHeaders.COOKIE,cookieLists);
//content-Type
requestHeaders.setContentType(MediaType.APPLICATION_FORM_URLENCODED);

封装请求参数

MultiValueMap<String, Object> reqParam=new LinkedMultiValueMap<>();
reqParam.add('key0','value0');
reqParam.add('key1','value1');

发起请求

 HttpEntity<MultiValueMap<String, Object>> requestEntity = new HttpEntity<MultiValueMap<String, Object>>(reqParam,requestHeaders);
String url="http://www.baidu.com";
 ResponseEntity<Object> response = restTemplate.exchange(url, HttpMethod.POST, requestEntity, Object.class);

获取返回值

Object obj= response.getBody();