How to use Java Jackson API to convert JsonNode to ArrayNode?

JiaJsonNode　is the base class for all JSON nodes forming the JSON tree modelArrayNode　is a node class that represents an array mapped from JSON content. We can use}}ObjectMapper　classreadTree()method andget()Method to access the value of the specified element in the array node, by casting to ArrayNode to retrieve the value, isJsonNodeConvert or convert to ArrayNode.

Syntax

public JsonNode readTree(String content) throws IOException, com.fasterxml.jackson.core.JsonProcessingException

Example

import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.node.ArrayNode;
import com.fasterxml.jackson.core.JsonProcessingException;
public class JsonNodeToArrayNodeTest {
　　　public static void main(String args[]) throws JsonProcessingException {
　　　　　　String jsonStr = "{\"Technologies\": [\"Java\", \"Scala\", \"Python\"]}";
　　　　　　ObjectMapper mapper = new ObjectMapper();
　　　　　　ArrayNode arrayNode = (ArrayNode) mapper.readTree(jsonStr).get("Technologies");
　　　　　　if(arrayNode.isArray()) {
　　　　　　　　　for(JsonNode jsonNode : arrayNode) {
　　　　　　　　　　　　System.out.println(jsonNode);
　　　　　　　　　}
　　　　　　}
　　　}
}

Output Result

"Java"
"Scala"
"Python"