How to get a value from a JSON string using jackson library?

Question

I am trying to get a value from a JSON string but I am getting a null value instead.

App2.java :

package JsonExample1;

import org.codehaus.jackson.J         


        

Answer 1

Convert to the Map

Map map = objectMapper.readValue(jsonString, Map.class);

Method for navigation in the map

private static  T get(Map map, Class clazz, String... path) {
    Map node = map;
    for (int i = 0; i < path.length - 1; i++) {
      node = (Map) node.get(path[i]);
    }
    return (T) node.get(path[path.length - 1]);
  }

Usage:

String value = get(map, String.class, "path", "to", "the", "node")