In the last tutorial we saw how to use @JsonView annotation on properties. This annotation can also be used on class level to indicate the default view(s), unless overridden by per-property annotation.

Example

Views

public class Views {
    public interface QuickContactView {}
    public interface DetailedView{}
}

POJO

@JsonView(Views.DetailedView.class)
public class Customer {
    @JsonView({Views.QuickContactView.class, Views.DetailedView.class})
    private String name;
    private String address;
    @JsonView({Views.QuickContactView.class})
    private String phone;
    @JsonView(Views.QuickContactView.class)
    private String cellPhone;
    private String emailAddress;
    @JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "yyyy/MM/dd", timezone = "America/Chicago")
    private Date customerSince;
    .............
}

Serializing QuickContactView

public class MainQuickContactViewSerialization {
    public static void main(String[] args) throws IOException {
        Customer customer = new Customer();
        customer.setName("Emily");
        customer.setAddress("642 Buckhannan Avenue Stratford");
        customer.setPhone("111-111-111");
        customer.setCellPhone("222-222-222");
        customer.setCustomerSince(Date.from(ZonedDateTime.now().minusYears(8).toInstant()));
        customer.setEmailAddress("emily@example.com");
        System.out.println("-- before serialization --");
        System.out.println(customer);

        ObjectMapper om = new ObjectMapper();
        String jsonString = om.writerWithView(Views.QuickContactView.class)
                     .writeValueAsString(customer);
        System.out.println("-- after serialization --");
        System.out.println(jsonString);
    }
}

-- before serialization --
Customer{name='Emily', address='642 Buckhannan Avenue Stratford', phone='111-111-111', cellPhone='222-222-222', emailAddress='emily@example.com', customerSince=Mon Aug 23 18:59:33 CDT 2010}
-- after serialization --
{"name":"Emily","phone":"111-111-111","cellPhone":"222-222-222"}

Serializing DetailedView

public class MainDetailedViewSerialization {
    public static void main(String[] args) throws IOException {
        Customer customer = new Customer();
        customer.setName("Emily");
        customer.setAddress("642 Buckhannan Avenue Stratford");
        customer.setPhone("111-111-111");
        customer.setCellPhone("222-222-222");
        customer.setCustomerSince(Date.from(ZonedDateTime.now().minusYears(8).toInstant()));
        customer.setEmailAddress("emily@example.com");

        System.out.println("-- before serialization --");
        System.out.println(customer);

        ObjectMapper om = new ObjectMapper();
        String jsonString = om.writerWithView(Views.DetailedView.class)
                     .writeValueAsString(customer);
        System.out.println("-- after serialization --");
        System.out.println(jsonString);
    }
}

-- before serialization --
Customer{name='Emily', address='642 Buckhannan Avenue Stratford', phone='111-111-111', cellPhone='222-222-222', emailAddress='emily@example.com', customerSince=Mon Aug 23 19:06:05 CDT 2010}
-- after serialization --
{"name":"Emily","address":"642 Buckhannan Avenue Stratford","emailAddress":"emily@example.com","customerSince":"2010/08/23"}

Example Project

Dependencies and Technologies Used:

• jackson-databind 2.9.6: General data-binding functionality for Jackson: works on core streaming API.
• JDK 10
• Maven 3.5.4