By default when an object is serialized to json format, all the properties in the object are serialized.

We can prevent this default behavior, by annotating the property with @JsonbTransient annotation.

Below is the example. The class to be serialized is Employee

Employee

1  import javax.json.bind.annotation.JsonbTransient;
2  
3  public class Employee {
4   private int id;
5   private String name;
6   private int ssn;
7  
8   public int getId() {
9       return id;
10  }
11 
12  public void setId(int id) {
13      this.id = id;
14  }
15 
16  public String getName() {
17      return name;
18  }
19 
20  public void setName(String name) {
21      this.name = name;
22  }
23 
24  @JsonbTransient
25  public int getSsn() {
26      return ssn;
27  }
28 
29  public void setSsn(int ssn) {
30      this.ssn = ssn;
31  }
32 }

When the object of an employee class is serialized. I want all properties except ssn to serialized. To do this I mark getSsn method with the annotation. Refer to line 24 in the above code.

The main code is as shown below

Main Code

import javax.json.bind.Jsonb;
import javax.json.bind.JsonbBuilder;

public class JsonbDemo6 {
    public static void main(String[] args) {
        Employee emp = new Employee();
        emp.setId(1);
        emp.setName("name1");
        emp.setSsn(9);
        
        Jsonb jsonb = JsonbBuilder.create();
        String result = jsonb.toJson(emp);
        System.out.println(result);
    }
}

Output

{“id”:1,”name”:”name1″}