loginservlet.java

用JSP开发的考勤系统 编译器为myeclipse

package kq.servlet;

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 xtu.cie.common.MyLogger;

import kq.model.Config;
import kq.model.bean.UserManageBean;

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>
	 *
	 * 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 {
		if(request.getParameter("logout") != null
				&& request.getParameter("logout").equalsIgnoreCase("true"))
			request.getSession().invalidate();
		request.setAttribute("errMsg", "");
		request.getRequestDispatcher(Config.PAGE_LOGIN).forward(request, response);
	}

	/**
	 * 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 {
		request.setCharacterEncoding("UTF-8");
		response.setCharacterEncoding("UTF-8");
		response.setContentType("text/html");
		
		String userName = request.getParameter("userName");
		String passWord = request.getParameter("passWord");
		String errMsg = "";
		UserManageBean userManager = UserManageBean.getInstance();
		
		if(!UserManageBean.validateEmail(userName)){
			errMsg = "用户名不合法！";
			request.setAttribute("errMsg", errMsg);
			request.getRequestDispatcher(Config.PAGE_LOGIN).forward(request, response);
		}
		else if(!userManager.validateUser(userName,passWord)){
			errMsg = "用户名不存在，或者用户名密码不匹配！";
			request.setAttribute("errMsg", errMsg);
			request.getRequestDispatcher(Config.PAGE_LOGIN).forward(request, response);
		}
		else{
			request.getSession().setAttribute("currentUser", userManager.getUserInfo(userName));
			request.getRequestDispatcher(Config.PAGE_MAIN).forward(request, response);
		}
	}

	/**
	 * Initialization of the servlet. <br>
	 *
	 * @throws ServletException if an error occurs
	 */
	public void init() throws ServletException {
		// Put your code here
		Config.USER_FILE_PATH = this.getServletContext().getRealPath("/") + "user.dat";
		Config.LOG_FILE_PATH = this.getServletContext().getRealPath("/") + "kq.log";
		
		MyLogger.setLOGFILE_PATH(Config.LOG_FILE_PATH);
		MyLogger.setOUTPUT_TYPE(Config.OUTPUT_TYPE);
		MyLogger.setRUNTIME_STATE(Config.RUNTIME_STATE);
	}

}