package com.demo;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.annotation.WebServlet;
@WebServlet("/GuessNumberServlet")
public class GuessNumberServlet extends HttpServlet {
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
int magic = (int) (Math.random() * 101);
HttpSession session = request.getSession();
session.setAttribute("num", new Integer(magic));
response.setContentType("text/html;charset=utf-8");
PrintWriter out = response.getWriter();
out.println("");
out.println("我想出一个0到100之间的数，请你猜！");
out.println("");
out.println("");
}
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
int guess = Integer.parseInt(request.getParameter("guess"));
HttpSession session = request.getSession();
int magic = (Integer) session.getAttribute("num");
response.setContentType("text/html;charset=utf-8");
PrintWriter out = response.getWriter();
out.println("");
if (guess == magic) {
session.invalidate(); // 销毁会话对象
out.println("祝贺你，答对了!");
out.println("再猜一次.");
} else if (guess > magic) {
out.println("太大了! 请重猜!");
} else {
out.println("太小了! 请重猜!");
}
out.println("");
out.println("");
}
}