package cn.com.servlet;

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 javax.servlet.http.HttpSession;

import java.io.IOException;

import java.util.Map;

@WebServlet("/loginKServlet")

public class LoginKServlet extends HttpServlet {

    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

        //1.设置request编码

        request.setCharacterEncoding("utf-8");

        //2 获取map 链接数据库就用这边这个

//        Map<String, String[]> map = request.getParameterMap();

        //2 简易版：

        String username = request.getParameter("username");

        String password = request.getParameter("password");

        String checkCode = request.getParameter("checkCode");

        //先获取生成的验证码

        HttpSession session = request.getSession();

        String checkCode_session = (String) session.getAttribute("checkCode_session");

        //判断验证码

        //获取数据库的值 check_session

//        username =username

        if (checkCode_session.equalsIgnoreCase(checkCode)) {

            //本来想能不能直接checkCode.equals(request.getSession().getAttribute())

            //但是放在if中前面的就是为了一定程度的空指针异常 //忽略大小写

            if ("admin".equals(username) && "root".equals(password)) {//调用userdao

                //储存信息，重定向到sussece，jsp

                session.setAttribute("username", username);

                response.sendRedirect(request.getContextPath() + "/success.jsp");

            } else {

                //不一致

                request.setAttribute("login_error", "error of password or username");

                //转发到登录页面

                request.getRequestDispatcher("/Login.jsp").forward(request, response);

            }

        } else {

            //不一致

            request.setAttribute("cc_error", "error");

            //转发到登录页面

            request.getRequestDispatcher("/Login.jsp").forward(request, response);

        }

    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

        this.doPost(request, response);

    }

}