Jackson (API)
| Jackson | |
|---|---|
| Stable release | 2.19.2
/ July 18, 2025 |
| Repository | |
| Operating system | Cross-platform |
| Type | API for JSON |
| License | Apache License 2.0 |
| Website | github |
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.[1][2]
Implementation
[edit]Jackson provides multiple approaches to working with JSON, including using binding annotations on POJO classes for simple use cases.[3][1]
Usage example
[edit]Sample code for reading and writing with POJOs may look like the following:[1]
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");
mapper.writeValue(System.out, p);
}
}