userlogin.java

使用OSGi框架开发的分布式电子辞典

/*
 * @(#)UserLogin.java
 * 
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Library General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */
package cn.edu.ynu.sei.dict.web.data;

import cn.edu.ynu.sei.dict.core.service.User;
import cn.edu.ynu.sei.dict.plugin.user.service.IUserManager;
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;

/**
 * Handle login.
 * @author zy
 * @version 1.0.0.1, Mar 12, 2008.
 */
public class UserLogin extends HttpServlet {

    private IUserManager userManager;

    /**
     * default construction.
     */
    public UserLogin() {
    }

    /**
     * construction with argument.
     * @param dm
     *         dic manager.
     */
    public UserLogin(IUserManager um) {
        this.userManager = um;
    }

    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        String name = request.getParameter("name");
        if (name == null || name.equals("")) {
            name = "";
        }
        System.out.println(name);
        String password = request.getParameter("password");
        if (password == null || password.equals("")) {
            password = "";
        }
        System.out.println(password);
        User user = userManager.getUserByUserName(name);
        if (user != null) {
            if (user.password.equals(password)) {
                HttpSession session = request.getSession();
                session.setAttribute("user", user);
                out.write("0");
                //out.write("登陆成功");
            } else {
                out.write("1");
                //out.write("密码错误,登录失败");
            }
        } else {
            out.write("2");
            //out.write("用户名错误,登录失败");
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     */
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     */
    public String getServletInfo() {
        return "Short description";
    }
    // </editor-fold>
}