loginservlet.java

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package com.cric.onlineshop.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 com.cric.onlineshop.dao.LoginDAO;
import com.cric.onlineshop.javabean.User;

public class LoginServlet extends HttpServlet {

	public LoginServlet() {
		super();
	}

	public void destroy() {
		super.destroy(); 
	}

	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		request.setCharacterEncoding("utf-8");
		response.setCharacterEncoding("utf-8");
		response.setContentType("text/html;charset=utf-8");
		PrintWriter out = response.getWriter();
		
	}

	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		request.setCharacterEncoding("utf-8");
		response.setCharacterEncoding("utf-8");
		response.setContentType("text/html;charset=utf-8");
		
		LoginDAO loginDAO=new LoginDAO();
		String method=request.getParameter("method");
		
		//管理员后台登陆
		if("adminLogin".equals(method)){
			//获得页面参数
			User user=loginDAO.getLoginParam(request,response);
			//验证用户信息
			boolean flag=loginDAO.checkLoginParam(user);
			//页面转向
			if(flag){
				request.getSession().setAttribute("userName", user.getUserName());
				response.sendRedirect("admin/main.jsp");
			}else{
				request.setAttribute("errors", "登陆失败，请重新登陆！");
				request.getRequestDispatcher("admin/login.jsp").forward(request, response);
			}
		}
		//用户首页登录
		if(method.equals("userLogin")){
			//获得页面参数
			User user=loginDAO.getLoginParam(request,response);
			//验证用户信息
			boolean flag=loginDAO.checkLoginParam(user);
			//页面转向
			if(flag){
				request.getSession().setAttribute("userName", user.getUserName());
				response.sendRedirect("index.jsp");
			}else{
				request.setAttribute("errors", "登陆失败，请重新登陆！");
				request.getRequestDispatcher("index.jsp").forward(request, response);
			}
		}
		//用户注册
		if("userRegist".equals(method)){
			
		}
		
	}

	public void init() throws ServletException {
	}

}