7.3.2 PUTting resources

For sending HTTP PUT requests, RestTemplate offers the put() method. All three overloaded variants of put() accept an Object that is to be serialized and sent to the given URL. As for the URL itself, it can be specified as a URI object or as a String. And like getForObject() and getForEntity(), the URL variables can be provided as either a variable argument list or as a Map.

Suppose that you want to replace an ingredient resource with the data from a new Ingredient object. The following code should do the trick:

public void updateIngredient(Ingredient ingredient) {
  rest.put("http://localhost:8080/ingredients/{id}",
              ingredient, ingredient.getId());
}

Here the URL is given as a String and has a placeholder that’s substituted by the given Ingredient object’s id property. The data to be sent is the Ingredient object itself. The put() method returns void, so there’s nothing you need to do to handle a return value.