Java Jackson with Maven Example

In order to work with the Java Jackson library you will need to add the Jackson dependency to the pom.xml

Jackson Maven Dependencies (JSON, XML and Annotation)

<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.13.4</version>
</dependency>

<dependency>
    <groupId>com.fasterxml.jackson.dataformat</groupId>
    <artifactId>jackson-dataformat-xml</artifactId>
    <version>2.13.4</version>
</dependency>

<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-annotations</artifactId>
    <version>2.13.4</version>
</dependency>

Example: Convert JSON String to Java Object:

import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;

import java.io.IOException;

public class JavaStringToJson {

    public static void main(String[] args) {
        try {
            String javaJsonString = "{\"empName\":\"Alex\",\"empAge\":25}";
            ObjectMapper objectMapper = new ObjectMapper();
            JsonNode jsonNode = objectMapper.readTree(javaJsonString);
            String name = jsonNode.get("empName").asText();
            int age = jsonNode.get("empAge").asInt();
            System.out.println(empName +" : " + empAge);

        } catch (IOException e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

Output: Alex : 25



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