spring-boot-rest/jackson-custom-conversions/src/main/java/com/baeldung/serialization/Item.java

package com.baeldung.serialization;

public class Item {
    public int id;
    public String itemName;
    public User owner;

    public Item() {
        super();
    }

    public Item(final int id, final String itemName, final User owner) {
        this.id = id;
        this.itemName = itemName;
        this.owner = owner;
    }

    // API

    public int getId() {
        return id;
    }

    public String getItemName() {
        return itemName;
    }

    public User getOwner() {
        return owner;
    }

}