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How to search a value inside a JSON file using Jackson in Java?
The com.fasterxml.jackson.databind.node.ObjectNode class can be used to map the JSON object structure in Json content. We can search for a particular value inside the JSON file using the get() method of ObjectNode class, this method used for accessing the value of a specified field of an object node.
Syntax
public JsonNode get(String fieldName)
Example
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ObjectNode;
public class ObjectNodeTest {
public static void main(String args[]) throws Exception {
String jsonString = "{\"Id\":101, \"name\":\"Raja Ramesh\", \"address\":\"Madhapur\"}";
ObjectMapper mapper = new ObjectMapper();
ObjectNode node = mapper.readValue(jsonString, ObjectNode.class);
if(node.has("name")) {
System.out.println("NAME: " + node.get("name"));
}
}
}Output
NAME: "Raja Ramesh"
Updated on: 09-Jul-2020
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