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How can we convert a JSON array to a list using Jackson in Java?\n
A Jackson is a Java-based library and it can be useful to convert Java objects to JSON and JSON to Java Object. A Jackson API is faster than other API, needs less memory area and is good for the large objects. We can convert a JSON array to a list using the ObjectMapper class. It has a useful method readValue() which takes a JSON string and converts it to the object class specified in the second argument.
Example
import java.util.*;
import com.fasterxml.jackson.databind.*;
public class JSONArrayToListTest1 {
public static void main(String args[]) {
String jsonStr = "[\"INDIA\", \"AUSTRALIA\", \"ENGLAND\", \"SOUTH AFRICA\", \"WEST INDIES\"]";
ObjectMapper objectMapper = new ObjectMapper();
try {
List<String> countries = objectMapper.readValue(jsonStr, List.class);
System.out.println("The countries are:\n " + countries);
} catch(Exception e) {
e.printStackTrace();
}
}
}Output
The countries are: [INDIA, AUSTRALIA, ENGLAND, SOUTH AFRICA, WEST INDIES]
Updated on: 06-Jul-2020
8K+ Views
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