java - 发布并接收结果

Question

安卓空间

void post(Food food)
{
    Gson gson = new Gson();
    String jsonFood = gson.toJson(food);

    RestTemplate restTemplate = new RestTemplate();
    restTemplate.getMessageConverters().add(new MappingJackson2HttpMessageConverter());

    restTemplate.postForEntity(URL, jsonFood, String.class);
}

后端空间

@PostMapping("/food")
public void postFood(@RequestBody String foodJson)
{
    Food food = new GsonBuilder().create().fromJson(foodJson, Food.class);

    String id = createId(food);
    // now how do I send back saying I got this and here is an id?

}

收到后我想回复说我收到了信息并发回了 ID。

Answer 1

Spring boot 会使用 Jackson 自动将 json 转换为模型对象

@PostMapping("/food")
public YourResponse postFood(@RequestBody Food food)
{
    String id = createId(food);
    return new YourResponse(id,"hello World");
}

响应对象

 public class YourResponse{
       private String id;
       private String response;
       //.. constructor, getter setter
 }