Convert the request parameters in rest url to an object

Question

Is there any direct method to convert the HTTP request parameters to an object? (something like object mapper)

For example, if the request http://localhot:8080/users/id=5&name=10 httpHandler() then id=5&name=10 this needs to converted to User object

public class User {
         int id;
         String name;
         //getters and setters
}

class MyHandler implements HttpHandler {
   @Override
   public void Handle(HttpExchange http) {
   String param = http.get.getRequestURI().getQuery();
   ?? // how to map it to the User Object?
   }
}

You can easily turn query parameters to a `Map` then use `queryMap.get("id")` for example. More at https://stackoverflow.com/questions/13592236/parse-a-uri-string-into-name-value-collection — SalaryNotFound, Apr 18 '19 at 14:54

score 0 · Answer 1 · answered Apr 18 '19 at 15:00

Spring does this for you automatically with RequestBody annotation.

Say you make an HTTP POST request to URL http://localhost:8080/users/ with JSON request

{
  id: 1,
  name: "Bob"
}

You can map this request using Spring like so:

@POST
@Path("/users")
@Consumes(MediaType.APPLICATION_JSON)
public String users(@RequestBody User user) {
    // Value is "ID: 1, Name: Bob"
    return "ID: " + user.getId() + ", Name: " + user.getName();
}

score 0 · Answer 2 · answered Apr 18 '19 at 15:17

0

If you are using Spring then Here is a very good example. You can annotate controller method with @GetMapping and pass a DTO object(that have all your request params as members) to method as an argument.

answered Apr 18 '19 at 15:17

Spinner

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Convert the request parameters in rest url to an object

2 Answers2