package com.imooc.web;

import com.imooc.dao.TopNDAO;
import com.imooc.domain.TopN;
import net.sf.json.JSONArray;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;

// 最受歡迎的TOPN課程
public class TopNServlet extends HttpServlet {

private TopNDAO dao;

@Override
public void init() throws ServletException {
    dao = new TopNDAO();
}

@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
    String day = req.getParameter("day");
    List<TopN> results =  dao.query(day);
    JSONArray json = JSONArray.fromObject(results);
    resp.setContentType("text/html;charset=utf-8");
    PrintWriter writer = resp.getWriter();
    writer.println(json);
    writer.flush();
    writer.close();
}

@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
    this.doGet(req, resp);
}
 

}

​