SpringMVC RestTemplate.postForObject metodu

Giriş

Http Post ile belirtilen sınıfı gönderir. Üçüncü parametre sonucun tipini belirtir.

İmzası şöyle

// Without parameters
<T> T postForObject(URI url, @Nullable Object request, Class<T> responseType)

// Parameter object list as var args
<T> T postForObject(String url, @Nullable Object request, Class<T> responseType, 
  Object... uriVariables)

// Parameter object list as a map
<T> T postForObject(String url, @Nullable Object request, Class<T> responseType, 
  Map<String, ?> uriVariables)

postForObject metodu - Parametresiz

Örnek
Şöyle yaparız.

String baseUrl = serviceSettings.getUrl();
String result = restTemplate.postForObject(baseUrl, foo, String.class);

Örnek

Şöyle yaparız

Todo todoObject = ...;

Todo todoCreated = restTemplate
  .postForObject("https://jsonplaceholder.typicode.com/todos", todoObject, Todo.class);

// Or postForEntity
ResponseEntity<Todo> todoResponse = restTemplate
  .postForEntity("https://jsonplaceholder.typicode.com/todos", todoObject, Todo.class);
Todo todoInserted = todoResponse.getBody();
System.out.println(todoResponse.getStatusCode().name()); // CREATED
System.out.println(todoResponse.getStatusCodeValue());   // 201

postForObject metodu - Var arg Parametre

Örnek

Şöyle yaparız

Order order = ...;
PaymentRequest paymentRequest =...;

// Call payment service
Payment payment = restTemplate
  .postForObject("https://payment-service/pay", paymentRequest, Payment.class);

postForObject metodu - Map Parametre

Örnek

Şöyle yaparız.

public void uploadDocument(byte[] fileContents, final String filename) {
  RestTemplate restTemplate = new RestTemplate();
  String fooResourceUrl = "http://localhost:8080/spring-rest/foos"; // Dummy URL.
  MultiValueMap<String, Object> map = new LinkedMultiValueMap<String, Object>();

  map.add("name", filename);
  map.add("filename", filename);

  // Here we 
  ByteArrayResource contentsAsResource = new ByteArrayResource(fileContents) {
    @Override
    public String getFilename() {
        return filename; // Filename has to be returned in order to be able to post.
    }
  };

  map.add("file", contentsAsResource);

  // Now you can send your file along.
  String result = restTemplate.postForObject(fooResourceUrl, String.class, map);

  // Proceed as normal with your results.
}