import java.util.*;

import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;

import kr.inflearn.BookDTO;

public class Project01_A {

	public static void main(String[] args) {
		//Object(BookDTO) -> JSON(String)
		
		BookDTO dto = new BookDTO("",21000,"",670);
		
		Gson g = new Gson();
		
		String json=g.toJson(dto);
		System.out.println(json);//{"title":"","price":21000,"compony":"","page":670}
		//JSON(String) ->Object(BookDTO)
		BookDTO dto1=g.fromJson(json, BookDTO.class);
		System.out.println(dto1); //BookDTO [title=, price=21000, compony=, page=670]
		System.out.println(dto1.getTitle()+"\t"+dto1.getPrice());
		
		//Object(List) -> JSON(String) : [{  }, {  }....]
		List lst=new ArrayList();
		lst.add(new BookDTO("1",21000,"1",570));
		lst.add(new BookDTO("2",31000,"2",670)); 
		lst.add(new BookDTO("3",11000,"3",370));
	
		String lstJson=g.toJson(lst);
		System.out.println(lst);
		System.out.println(lstJson);
		
		
		//JSON(String) -> Object(List)
		Listlst1=g.fromJson(lstJson, new TypeToken(){}.getType());
		for(BookDTO vo: lst1) {
			System.out.println(vo);
		}
		
	}

}