Anotaciones Jackson - Anotación personalizada
Podemos crear anotaciones personalizadas fácilmente usando la anotación @JacksonAnnotationsInside.
Ejemplo: anotación personalizada
import java.io.IOException;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.text.ParseException;
import com.fasterxml.jackson.annotation.JacksonAnnotationsInside;
import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.annotation.JsonInclude.Include;
import com.fasterxml.jackson.annotation.JsonPropertyOrder;
import com.fasterxml.jackson.databind.ObjectMapper;
public class JacksonTester {
public static void main(String args[]) throws IOException, ParseException {
ObjectMapper mapper = new ObjectMapper();
Student student = new Student(1,13, "Mark");
String jsonString = mapper
.writerWithDefaultPrettyPrinter()
.writeValueAsString(student);
System.out.println(jsonString);
}
}
@CustomAnnotation
class Student {
public int id;
public int rollNo;
public String name;
public String otherDetails;
Student(int id, int rollNo, String name){
this.id = id;
this.rollNo = rollNo;
this.name = name;
}
}
@Retention(RetentionPolicy.RUNTIME)
@JacksonAnnotationsInside
@JsonInclude(value = Include.NON_NULL)
@JsonPropertyOrder({ "rollNo", "id", "name" })
@interface CustomAnnotation {}
Salida
{
"rollNo" : 13,
"id" : 1,
"name" : "Mark"
}