How to do it...

Perform the following steps to try this recipe:

1. We first create a User class with some customization (the details follow):

public class User {

    private Long id;
    
    @JsonbProperty("fullName")
    private String name;
    
    private String email;
    
    @JsonbTransient
    private Double privateNumber;
    
    @JsonbDateFormat(JsonbDateFormat.DEFAULT_LOCALE)
    private Date dateCreated;
    
    public User(Long id, String name, String email, 
                Double privateNumber, Date dateCreated) {
        this.id = id;
        this.name = name;
        this.email = email;
        this.privateNumber = privateNumber;
        this.dateCreated = dateCreated;
    }

    private User(){
    }

    //DO NOT FORGET TO IMPLEMENT THE GETTERS AND SETTERS
}

2. Here, we use UserView to return the user JSON to the UI:

@ViewScoped
@Named
public class UserView implements Serializable{
    
    private String json;
    
    public void loadUser(){
        long now = System.currentTimeMillis();
        User user = new User(now, 
                "User" + now, 
                "user" + now + "@eldermoraes.com",
                Math.random(),
                new Date());
        
        Jsonb jb = JsonbBuilder.create();
        json = jb.toJson(user);
        try {
            jb.close();
        } catch (Exception ex) {
            System.out.println(ex.getMessage());
        }
    }

    public String getJson() {
        return json;
    }

    public void setJson(String json) {
        this.json = json;
    }
}

3. We add a JSF page just to show the results:

 <h:body>
 <h:form>
 <h:commandButton type="submit" action="#{userView.loadUser()}" 
  value="Load User" />
 
 <br />
 
 <h:outputLabel for="json" value="User JSON" />
 <br />
 <h:inputTextarea id="json" value="#{userView.json}" 
  style="width: 300px; height: 300px;" />
 </h:form>
 </h:body>