loginproc.java

用JSP完成根据用户的身份实现登录识别的下载

package com.mypack.servlet;

import java.io.IOException;
import java.util.HashMap;

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.mypack.bo.LoginBO;
import com.mypack.dto.UserInfo;

public class LoginProc extends HttpServlet {
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		doPost(request, response);
	}

	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		HttpSession session = request.getSession();
		String reqValidCode = request.getParameter("validCode");
		String sessionValidCode = (String) session.getAttribute("validCode");
		
		if (!new LoginBO().checkValidCode(reqValidCode, sessionValidCode)) {
			request.setAttribute("errorMsg", "验证码错误");
			request.getRequestDispatcher("../jsp/login.jsp").forward(request,
					response);
		} else {
			String username = request.getParameter("username");
			String password = request.getParameter("passwordMD5");
			UserInfo userInfo = new UserInfo(username, password);
			HashMap<String, UserInfo> hmUserInfo = (HashMap<String, UserInfo>) getServletContext()
					.getAttribute("hmUserInfo");
			if (new LoginBO().checkUserPassword(userInfo, hmUserInfo)) {
				session.setAttribute("userInfo", hmUserInfo.get(username));
				request.getRequestDispatcher("../jsp/down.jsp").forward(
						request, response);
			} else {
				request.setAttribute("errorMsg", "用户名或密码错误");
				request.getRequestDispatcher("../jsp/login.jsp").forward(
						request, response);
			}
		}

	}

}