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("자바",21000,"에이콘",670);
		
		Gson g = new Gson();
		
		String json=g.toJson(dto);
		System.out.println(json);//{"title":"자바","price":21000,"compony":"에어콘","page":670}
		//JSON(String) ->Object(BookDTO)
		BookDTO dto1=g.fromJson(json, BookDTO.class);
		System.out.println(dto1); //BookDTO [title=자바, price=21000, compony=에이콘, page=670]
		System.out.println(dto1.getTitle()+"\t"+dto1.getPrice());
		
		//Object(List<BookDTO>) -> JSON(String) : [{  }, {  }....]
		List<BookDTO> lst=new ArrayList<BookDTO>();
		lst.add(new BookDTO("자바1",21000,"에이콘1",570));
		lst.add(new BookDTO("자바2",31000,"에이콘2",670)); 
		lst.add(new BookDTO("자바3",11000,"에이콘3",370));
	
		String lstJson=g.toJson(lst);
		System.out.println(lst);
		System.out.println(lstJson);
		
		
		//JSON(String) -> Object(List<BookDTO>)
		List<BookDTO>lst1=g.fromJson(lstJson, new TypeToken<List<BookDTO>>(){}.getType());
		for(BookDTO vo: lst1) {
			System.out.println(vo);
		}
		
	}

}