如何从具有不同字段的同一类创建两个 json 文件

Question

In my application i need to create the two json file from same object(object contain input + output fields) Json file - 1: This json file should contain only input fields. Json file - 2: This json file should contain few input fields and all output fields.

Let me explain with small example

below is the class from which i wants to generate the two json file

Class AreaDTO {
 String id;
 String name;
 String streetName;
 Street output;
}

json file 1     |   json file 2
{               |   {
  id            |       id
  name          |       name
  streetName    |       output
}              |    }

To creating object to json file currently i am using jackson, How to achieve my above requiremnet with jackson or is there any other way to achieve this?

Answer 1

You can use @JsonInclude(Include.NON_NULL) annotation at the class level. Then set the fields to null which you don't need. Then Jackson will ignore the fields which are null.

Please check https://mkyong.com/java/jackson-how-to-ignore-null-fields/

One more option is to use a custom JSON filter. Use Jackson to only serialize a field if it meets a specific, custom criteria.

Please check https://www.baeldung.com/jackson-serialize-field-custom-criteria