RestTemplate的DELETE及PUT等请求方法使用精讲

@Test
void testDelete()  {
   String url = "http://jsonplaceholder.typicode.com/posts/1";
   restTemplate.delete(url);
}

@Test
void testPut()  {
   // 请求地址
   String url = "http://jsonplaceholder.typicode.com/posts/1";
   // 要发送的数据对象（修改数据）
   PostDTO postDTO = new PostDTO();
   postDTO.setUserId(110);
   postDTO.setTitle("zimug 发布文章");
   postDTO.setBody("zimug 发布文章 测试内容");
   // 发送PUT请求
   restTemplate.put(url, postDTO);
}

//使用getForEntity发送GET请求
ResponseEntity<PostDTO> responseEntity
            = restTemplate.getForEntity(url, PostDTO.class);
//使用exchange发送GET请求
ResponseEntity<PostDTO> responseEntity = restTemplate.exchange(url, HttpMethod.GET,
            null, PostDTO.class);

// 使用postForEntity发送POST请求
ResponseEntity<String> responseEntity
            = restTemplate.postForEntity(url, postDTO, String.class);
// 使用exchange发送POST请求
ResponseEntity<String> responseEntity
            = restTemplate.exchange(url, HttpMethod.POST,null, String.class);

// 使用delete发送DELETE请求，返回值为void
restTemplate.delete(url);
// 使用exchange发送DELETE请求
ResponseEntity<String> result = restTemplate.exchange(url, HttpMethod.DELETE,null,String.class);

@Test
public void testHEAD()  {
   String url = "http://jsonplaceholder.typicode.com/posts/1";
   HttpHeaders httpHeaders  = restTemplate.headForHeaders(url);
   //断言该资源接口数据为JSON类型
   assertTrue(httpHeaders.getContentType()
               .includes(MediaType.APPLICATION_JSON));
   System.out.println(httpHeaders);
}

@Test
public void testOPTIONS()  {
   String url = "http://jsonplaceholder.typicode.com/posts/1";
   Set<HttpMethod> optionsForAllow  = restTemplate.optionsForAllow(url);
   HttpMethod[] supportedMethods
               = {HttpMethod.GET, HttpMethod.POST, HttpMethod.PUT, HttpMethod.DELETE};
   //测试该url资源是否支持GET、POST、PUT、DELETE，即增删改查
   assertTrue(optionsForAllow.containsAll(Arrays.asList(supportedMethods)));
}