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How to ignore multiple properties of JSON object in Java?

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2023-09-18 22:29:02660browse

How to ignore multiple properties of JSON object in Java?

@JsonIgnorePropertiesThe Jackson annotation can be used to specify a property list or field for a class to ignore. @JsonIgnoreProperties annotation Can be placed before a class declaration instead of before an individual property or field to be ignored.

Syntax

@Target(value={ANNOTATION_TYPE,TYPE,METHOD,CONSTRUCTOR,FIELD})
@Retention(value=RUNTIME)
public @interface JsonIgnoreProperties

Example

import java.io.*;
import com.fasterxml.jackson.annotation.*;
import com.fasterxml.jackson.databind.*;
public class JsonIgnorePropertiesTest {
   public static void main(String[] args) throws IOException {
      Customer customer = new Customer("120", "Ravi", "Hyderabad");
      System.out.println(customer);
      ObjectMapper mapper = new ObjectMapper();
      String jsonString = mapper.writeValueAsString(customer);
      System.out.println("JSON: " + jsonString);
      System.out.println("---------");
      jsonString = "{\"id\":\"130\",\"name\":\"Rahul\", \"address\":\"Mumbai\"}";
      System.out.println("JSON: " + jsonString);
      customer = mapper.readValue(jsonString, Customer.class);
      System.out.println(customer);
   }
}
// Customer class
@JsonIgnoreProperties({"id", "address"}) <strong>
</strong>class Customer {
   private String id;
   private String name;
   private String address;
   public Customer() {
   }
   public Customer(String id, String name, String address) {
      this.id = id;
      this.name = name;
      this.address = address;
   }
   public String getId() {
      return id;
   }
   public String getName() {
      return name;
   }
   public String getAddress() {
      return address;
   }
<strong>   </strong>@Override
   public String toString() {
      return "Customer [id=" + id + ", name=" + name + ", address=" + address + "]";
   }
}

Output

Customer [id=120, name=Ravi, address=Hyderabad]
JSON: {"name":"Ravi"}
---------
JSON: {"id":"130","name":"Rahul", "address":"Mumbai"}
Customer [id=null, name=Rahul, address=null]

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