check.java

该系统采用B/S架构设计的一个小型的通讯录系统

package servlet;

import java.io.IOException;
import java.io.PrintWriter;

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

import DAO.dao;

public class Check extends HttpServlet {

	public void destroy() {
		super.destroy(); 
	}
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		response.setContentType("text/html;charset=gbk");
		PrintWriter out = response.getWriter();
		String userid = request.getParameter("userid");
		String password = request.getParameter("password");
		dao dao =  new dao();
		int n = dao.check(userid ,password);
		if(n>0){
			//out.write("<script type='text/javascript'>alert('登录失败');</script>");
			//request.getRequestDispatcher("/login.jsp").include(request, response);
			//out.print("hgjghjgh");
			out.write("<script type='text/javascript'> window.alert('恭喜你登录成功');</script>");
			//response.sendRedirect("../index");
			request.getRequestDispatcher("/index.jsp").include(request, response);
		}else{
			out.print("<script type='text/javascript'>window.alert('很抱歉你登录失败');</script>");
			request.getRequestDispatcher("/login.jsp").include(request, response);
		}
	}
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		this.doGet(request, response);
	}

	public void init() throws ServletException {
		
	}

}