package shop4;

import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

import javax.mail.Session;
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;

/**
 * Servlet implementation class wsdd
 */
@WebServlet("/wsddd")
public class wsdd extends HttpServlet {
	private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public wsdd() {
        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 {
		 response.setContentType("text/html;charset=utf-8");
	        request.setCharacterEncoding("utf-8");
	        String username = request.getParameter("username");
	        String pwd = request.getParameter("pwd");
	        try {
	            Class.forName("com.mysql.jdbc.Driver");
	        } catch (ClassNotFoundException e) {
	            e.printStackTrace();
	            System.out.println("找不到驱动 ");
	        }
           String url="jdbc:mysql://localhost:3306/eims?useUnicode=true&characterEncoding=gbk";
	        Connection conn = null;
	        Statement stmt = null;
	        ResultSet rs = null;
	        HttpSession session = request.getSession();
	        try {
	            conn = (Connection) DriverManager.getConnection(url, "root", "root");
	            stmt = (Statement) conn.createStatement();
	            String sql="select * from user where userName='" + username + "' and  password='"+pwd+"'";
	            rs = stmt.executeQuery(sql);
	           
	            
	        } catch (SQLException e) {
	            e.printStackTrace();
	        }
	        session.setAttribute("username", username);
	        try {
	            if (rs.next()) {
	            	session.setAttribute("msg", null);
	            	request.getRequestDispatcher("/main.jsp").forward(request, response);
	            	
	            } else {
	                response.sendRedirect("login3.jsp");
	            }
	        } catch (SQLException e) {
	            e.printStackTrace();
	        }

	    }

}