
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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