loginservlet.java

该项目为网上书店

package org.myrose.servlet;

import java.io.IOException;

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 org.myrose.beans.Member;
import org.myrose.dao.MemberDAO;


public class LoginServlet extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public LoginServlet() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	/**
	 * The doGet method of the servlet. <br>
	 *
	 * 此方法用来检验用户登录
	 * 
	 * @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 {

		response.setContentType("text/html;charset=GBK");
		request.setCharacterEncoding("GBK");
		String name=request.getParameter("username");
		String pass=request.getParameter("PWD");
		MemberDAO memberDAO=new MemberDAO();
		Member member=null;
		try {
			member = memberDAO.findMemberByNamePass(name, pass);
		} catch (Exception e) {
			e.printStackTrace();
		}
		HttpSession session=request.getSession();
		if(member==null){
			request.setAttribute("islogin", "no");
			request.getRequestDispatcher("index.aspx").forward(request, response);
		}else{
			session.setAttribute("username", member.getUsername());
			session.setAttribute("member", member);
			response.sendRedirect("index.aspx");
		}
	}

	/**
	 * 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 {
		doGet(request, response);
	}

	/**
	 * Initialization of the servlet. <br>
	 *
	 * @throws ServletException if an error occure
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}