checkuserservlet.java

网上购物源代码

package com.chinaaccpservlet;

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

import javax.servlet.RequestDispatcher;
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.chinaaccpDao.UserNameDao;
import com.chinaaccpbean.LoginUserBean;
import com.jspsmart.upload.SmartUpload;

public class CheckUserServlet extends HttpServlet {

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

		
		HttpSession session = request.getSession();
		PrintWriter out = response.getWriter();
		String username = request.getParameter("logname");
		//System.out.println(username);
		if(!username.equals(""))
			session.setAttribute("username", username);
		else
		{
			session.setAttribute("username", null);
			session.setAttribute("xx", "用户名不能为空");
			session.setAttribute("mess", null);
			System.out.println("fdsa");
		}
		if(session.getAttribute("xx")!=null&&!username.equals(""))
			session.setAttribute("xx", null);
		if(!username.equals(""))
		{
			UserNameDao user = new UserNameDao();
			String str = user.GetCheckInfo(username);
			session.setAttribute("mess", str);
			session.setAttribute("username", username);
		}
		
		response.sendRedirect("Jsp/Login.jsp");
		out.flush();
		out.close();
	}

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

}