@JsonRootNamepermite tener un nodo raíz especificado sobre JSON. Necesitamos habilitar también el valor de raíz de ajuste.
Ejemplo @JsonRootName
import java.io.IOException;
import com.fasterxml.jackson.annotation.JsonRootName;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
public class JacksonTester {
public static void main(String args[]){
ObjectMapper mapper = new ObjectMapper();
try {
Student student = new Student("Mark", 1);
mapper.enable(SerializationFeature.WRAP_ROOT_VALUE);
String jsonString = mapper
.writerWithDefaultPrettyPrinter()
.writeValueAsString(student);
System.out.println(jsonString);
}
catch (IOException e) {
e.printStackTrace();
}
}
}
@JsonRootName(value = "student")
class Student {
private String name;
private int rollNo;
public Student(String name, int rollNo){
this.name = name;
this.rollNo = rollNo;
}
public String getName(){
return name;
}
public int getRollNo(){
return rollNo;
}
}
Salida
{
"student" : {
"name" : "Mark",
"rollNo" : 1
}
}