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How to ignore a class during the serialization using Jackson in Java?
The Jackson @JsonIgnoreType annotation can be used to ignore a class during the serialization process and it can mark all the properties or fields of a class to be ignored while serializing and deserializing a JSON object.
Syntax
@Target(value={ANNOTATION_TYPE,TYPE})
@Retention(value=RUNTIME)
public @interface JsonIgnoreTypeExample
import com.fasterxml.jackson.annotation.*;
import com.fasterxml.jackson.core.*;
import com.fasterxml.jackson.databind.*;
import java.io.*;
public class JsonIgnoreTypeTest {
public static void main(String args[]) throws IOException {
Employee emp = new Employee();
ObjectMapper mapper = new ObjectMapper();
String jsonString = mapper.writerWithDefaultPrettyPrinter().writeValueAsString(emp);
System.out.println(jsonString);
}
}
// Employee class
class Employee {
@JsonIgnoreType
public static class Address {
public String firstLine = null;
public String secondLine= null;
public String thirdLine = null;
@Override
public String toString() {
return "Address{" +
"firstLine='" + firstLine+ '\'' +
", secondLine='" + secondLine+ '\'' +
", thirdLine='" + thirdLine + '\'' +
'}';
}
} // end of Address class
public long empId = 115;
public String empName = "Raja Ramesh";
public Address empAddress = new Address();
@Override
public String toString() {
return "Employee{" +
"empId=" + empId +
", empName='" + empName + '\'' +
", empAddress=" + empAddress +
'}';
}
}Output
{
"empId" : 115,
"empName" : "Raja Ramesh"
}
Updated on: 06-Jul-2020
2K+ Views
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