login.java

jsp网站开发四“酷”全书原码

package cn.wanfeng.myblog.servlet;

import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.*;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import cn.wanfeng.myblog.servlet.*;
import cn.wanfeng.myblog.dao.*;
import cn.wanfeng.myblog.dto.*;
import cn.wanfeng.myblog.factory.*;

public class Login extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public Login() {
		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>
	 * 
	 * 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 {
		
	}

	/**
	 * 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 {

		try {
			String Username = request.getParameter("username");
			String Password = request.getParameter("password");
			// create the DAO class
			BlogDao dao = BlogDaoFactory.create();

			// execute the finder
			String ForwardPage="";
			String Message="";
			Blog dto[] = dao.findWhereUsernameEquals(Username);
			System.out.println(dto[0].getPassword());
			if (dto!=null && dto[0].getPassword().equals(Password)){
				ForwardPage="/Admin/Article/Article.jsp";				
			}else{
				Message="登录失败。";
				ForwardPage="/Error.jsp";
			}	
			// store the results
			request.setAttribute("Message", dto);
			RequestDispatcher requestDispatcher = this.getServletContext().getRequestDispatcher(ForwardPage);
			requestDispatcher.forward(request, response);	
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

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

}