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,"company":"에이콘","page":670}

//JSON(String) -> Object(BookDTO)

BookDTO dto1=g.fromJson(json, BookDTO.class);

System.out.println(dto1); // BookDTO [title=자바, price=21000, company=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(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);

}

}

}