Spring Boot Rest Controller API not returning json

Question

I am building a CRUD Spring Boot Application. Following is the code snippet for Rest Controller

@RestController
@RequestMapping("/api")
public class UserController {

    @Autowired
    private  UserRepository userRepository;


    @GetMapping("/users")
    public List<User> getUsers() {
        List<User> allUsers = userRepository.findAll();
        return allUsers;
    }
}

When I make a call "/api/users", I get the following response :

[
{ },
{ },
]

User Class :

package entities;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;


@Entity
@Table(name = "appuser")
public class User {

    @Id
    @GeneratedValue
    private Long id;
    private String fname;
    private String lname;


    public User(String fname, String lname) {

        this.fname = fname;
        this.lname = lname;
    }


    public User() {

    }


    @Override
    public String toString() {
        return "User [id=" + id + ", fname=" + fname + ", lname=" + lname + "]";
    }
}

I expect the response in json form. How can I fix it?

How does the User look like?

sschmeck
– sschmeck

2018-07-11 09:03:57 +00:00
Commented Jul 11, 2018 at 9:03 — sschmeck
– sschmeck, Commented Jul 11, 2018 at 9:03

Konrad Botor · Accepted Answer · 2018-07-11 09:08:28Z

5

If I remember correctly Spring Boot uses Jackson by default, and Jackson by default uses getters during serialization process, so you need to add getters for the fields you want to appear in JSON.

Alternatively, you can add this annotation to your class:

@JsonAutoDetect(fieldVisibility = Visibility.ANY)

to use all fields, regardless of visibility, in your JSON

answered Jul 11, 2018 at 9:08

Konrad Botor

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