import java.io.File;
import java.io.IOException;
import java.util.ArrayList;

import com.fasterxml.jackson.core.exc.StreamReadException;
import com.fasterxml.jackson.databind.DatabindException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
import com.fasterxml.jackson.databind.type.CollectionType;
import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;

public class Conv {
    
    public void conv() {
        try {
            tryConv();
        }catch(StreamReadException e) {
            System.err.println("Hiba! A folyam olvasása sikertelen!");
        }catch(DatabindException e) {
            System.err.println("Hiba! A csatolás sikertelen!");
            System.err.println(e.getMessage());
        }catch(IOException e) {
            System.err.println("Hiba! A beolvasás sikertelen!");
        }
    }
    public void tryConv() throws IOException {
        ObjectMapper om = new ObjectMapper();

        om.registerModule(new JavaTimeModule());
        om.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);        

        CollectionType ct = om.getTypeFactory()
        .constructCollectionType(ArrayList.class, Employee.class);
        ArrayList<Employee> empList = om.readValue(new File("emp.json"),
        ct);


        System.out.println(empList.get(0).birth.date);
    }
}