Jackson (API)

Jackson
Stable release	2.19.2 / July 18, 2025 (2025-07-18)
Operating system	Cross-platform
Type	API for JSON
License	Apache License 2.0
Website	github.com/FasterXML/jackson
Repository	github.com/FasterXML/jackson.git

In computing, Jackson is a high-performance JSON processor for Java. Its developers extol the combination of fast, correct, lightweight, and ergonomic attributes of the library.

Implementation

Jackson provides multiple approaches to working with JSON, including using binding annotations on POJO classes for simple use cases.

Usage example

Sample code for reading and writing with POJOs may look like the following:

package org.wikipedia.examples;

import java.io.IOException;

import com.fasterxml.jackson.databind.ObjectMapper;

record Person(int id, String firstName, String lastName) {}

public class ReadWriteJackson {
    public static void main(String[] args) throws IOException {
        ObjectMapper mapper = new ObjectMapper();
   
        String jsonInput = "{\"id\":0,\"firstName\":\"Robin\",\"lastName\":\"Wilson\"}";
        Person q = mapper.readValue(jsonInput, Person.class);
        System.out.printf("Read and parsed Person from JSON: %s%n", q);
   
        Person p = new Person(1, "Roger", "Rabbit");
        System.out.printf("Person object %s as JSON =%n", p);
        mapper.writeValue(System.out, p);
    }
}

External links

• jackson on GitHub