loginservlet.java

基于MVC模式的文章采集检索系统

package com.liubin.servlet.user;

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.liubin.model.User;
import com.liubin.service.user.UserService;

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
	}

	
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		
		
		System.out.print(request.getContextPath());
		String name=request.getParameter("name");
		String password=request.getParameter("password");
		String message;
		String path=request.getContextPath();
		User user=null;
		
		if(name!=null && name.trim().length()>0){
			UserService service =new UserService();
			
			if(password!=null&&password.trim().length()>0){
				user=service.IsUSerByName(name.trim(), password.trim());
				if(user==null||!(user.getPassword().equals(password))){
					message="用户名密码错误";
					path="index.jsp";
					request.setAttribute("message", message);
				}
				else{
					if(user.getAdmin_flag().equals("Y")){
						path="/listUserServlet";
					}else{
						HttpSession session =request.getSession();
						session.setAttribute("user", user);
						path="article/search_normal.jsp";
					}
					
				}
			}
			else{
				message="密码不能为空";
				path="index.jsp";
				request.setAttribute("message", message);
			}
		}
		else{
			message="用户名不能为空";
			path="index.jsp";
			request.setAttribute("message", message);
		}
		request.getRequestDispatcher(path).forward(request, response);
		//response.sendRedirect(path);
	}

	/**
	 * 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 {

		this.doGet(request, response);
	}

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

}