loginservlet.java

使用JAVA图形用户界面设计的简单的地址管理系统附带数据库

package com.huade.address.user.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 javax.servlet.http.HttpSession;

import com.common.BaseServlet;
import com.huade.address.linkmen.dto.UserinfoDto;
import com.huade.address.user.service.UserService;
import com.huade.address.user.service.impl.UserServiceImpl;

public class LoginServlet extends HttpServlet
{

	/**
	 * The doGet method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException
	{

		this.doPost(request, response);
	}

	/**
	 * The doPost method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to post.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException
	{

		response.setContentType("text/html");
		UserServiceImpl  UserService = new UserService();
		String url="";
	String action  = request.getParameter("act")==null?"":request.getParameter("act");
	if("login".equals(action))
	{
		String userAccount =request.getParameter("userAccount").trim()==null?"":request.getParameter("userAccount").trim();
		String userPwd  = request.getParameter("userPwd").trim()==null?"":request.getParameter("userPwd").trim();
	     UserinfoDto  userDto =UserService.isExistsUser(userAccount, userPwd);
	     if(userDto!=null)
	     {
	    	 HttpSession session  = request.getSession();
	    	 session.setAttribute("userinfo", userDto);
	    	 url = "/address/index.jsp";
	     }	else
	     {
	    	request.setAttribute("key", "error") ;
	    	url="/login.jsp";
	     }
	}
	
	if("out".equals(action))
	{
		HttpSession session  = request.getSession();
		session.invalidate();
		url="/login.jsp";
	}
		
	  BaseServlet.forward(request, response, url);	
	}

}