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  • Read the Specific JSON Property

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    The below Example will show you how to read the specific property from the file in JSON format or to read the Specific property from the JSON data.


    emp.txt

    {
      "id": 123,
      "name": "Manish",
    
      "phone": [
        123456,
        987654
      ],
      "role": "Manager",
      "cities": [
        "Los Angeles",
        "New York"
      ],
      "properties": {
        "age": "29 years",
        "salary": "1000 USD"
      }
    }
    

    JSONDemo.java

    package com.evon;
    
    import java.nio.file.Files;
    import java.nio.file.Paths;
    import java.util.Iterator;
    
    import org.codehaus.jackson.JsonNode;
    import org.codehaus.jackson.map.ObjectMapper;
    
    public class JSONDemo {
    
        /**
         * @param args
         */
        public static void main(String[] args)throws Exception {
            // TODO Auto-generated method stub
    
            byte[] jsonData = Files.readAllBytes(Paths.get("emp.txt"));
            ObjectMapper objectMapper = new ObjectMapper();
    
            //read JSON like DOM Parser
            JsonNode rootNode = objectMapper.readTree(jsonData);
            JsonNode nameNode = rootNode.path("name");
            System.out.println("name = "+nameNode.asText());
    
            JsonNode phoneNosNode = rootNode.path("phone");
            Iterator<JsonNode> elements = phoneNosNode.getElements();
            while(elements.hasNext()){
                JsonNode phone = elements.next();
                System.out.println("Phone's = "+phone.asLong());
            }
    
        }
    
    }
    

    In the above Code we have only read the specific property name and phone from the file which is in JSON format.

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