BookServlet.java

package edu.hebtu.movingcampus.library.servlet;

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

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.google.gson.Gson;

import edu.hebtu.movingcampus.library.entity.Book;

/**
 * Servlet implementation class BookServlet
 */
@WebServlet("/lib")
public class BookServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public BookServlet() {
        super();
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		doPost(request, response);
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		PrintWriter out = response.getWriter();
		//HttpSession session = request.getSession();
		Book book = new Book();
		book.setFine(2);
		book.setName("C++");
		book.setReBorrow(1);
		book.setRemainTime(10);
		ArrayList<Book> a = new ArrayList<>();
		a.add(book);
		String res = new Gson().toJson(a);

		out.printf(res);
		
	}

}