如何在 Spring 引导 REST ZDB974238714CA8DE634A7CE1D083A14F 中格式化返回的 json？

Question

I created the following REST API with Spring Boot.

@RestController
public class PersonController {
    
    @Autowired
    private PersonRepository PersonRepository;
    
    @PostMapping(value="/Person", produces = "application/json")
    public ResponseEntity<Person> addPerson(@RequestBody Person Person){
        
        Person newPerson = PersonRepository.save(Person);       
        
        return new ResponseEntity<Person>(newPerson, HttpStatus.OK) ;
    }

}

In Postman I select:

POST > http://localhost:8080/person > json

Then in the body field I place the following json and hit send:

{"id":"", "name":"john", "age":"40", "email":"test@test.com"}

This is the return I'm getting:

{
    "name": "john",
    "age": 40,
    "email": "test@test.com",
    "_links": {
        "self": {
            "href": "http://localhost:8080/person/10"
        },
        "person": {
            "href": "http://localhost:8080/person/10"
        }
    }
}

But, I'd like to have the json return in this other format:

{
    "id": 10,
    "name": "john",
    "age": 40,
    "email": "test@test.com"
}

How to do that?

Answer 1

Looks like you are also using SpringDataRest which exposes _links etc. based on your entity. I guess the controller from SpringDataRest is called in your request and not your custom endpoint. Try to log something in your controller method to ensure that it's actually called. If you don't need SpringDataRest at another part of your service you should remove the dependency.

Answer 2

I just found the issue.

In the controller the code was:

@PostMapping(value="/person"....

While in postman I was calling:

http://localhost:8080/persons

(with the letter s at the end)

As a result it never entered the controller method.

When I removed the s from the postman call it worked and returned the json just the way I wanted.

Now...

The interesting part is that, when was calling with the letter s, it did save to the db and returned the json even the mapping being incorrect.

So I decided to run on debug mode (with the incorrect mapping) and noticed it was not entering the method.

That was weird. How could it correctly save and return the json?

Then I decided to comment out all of the method and run the call on postman again.

Once again it did save the json to the db and returned the json in the first format.

So seems this is being done on behind the scenes somehow, surely not by the method I created.