loginbean.java

本系统完成简单的图书管理系统

/***********************************************************************
*                          湖南大学图书管理系统
* @author Administrator                                                         
* @since 2008.06                                                  
* @version 1.0                                                           															  
* @category 登录处理bean
*************************************************************************/
package library.control;

import java.io.IOException;
import java.util.ArrayList;

import javax.servlet.RequestDispatcher;
import javax.servlet.Servlet;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import library.DBaccess.LoginDB;;;

public class LoginBean extends HttpServlet implements Servlet{

	@Override
	protected void doGet(HttpServletRequest req, HttpServletResponse resp)
			throws ServletException, IOException {
		// TODO Auto-generated method stub
		super.doPost(req, resp);
	}

	@Override
	protected void doPost(HttpServletRequest req, HttpServletResponse resp)
			throws ServletException, IOException {
		// TODO Auto-generated method stub
		req.setCharacterEncoding("gb2312");
		HttpSession session=req.getSession();
		
		
		String userName=req.getParameter("userName");
		String userPassword=req.getParameter("userPassword");
		String userTypeTemp=req.getParameter("userType");
		
		
		int userType = 0;;
		
		if(userTypeTemp.toString().equals("student"))
		{
			userType = 1;
		}
		else if(userTypeTemp.toString().equals("manager"))
		{
			userType = 2;
		}
		
		LoginDB lp=new LoginDB();;
		int i=lp.Login(userName, userPassword, userType);
		log("i:"+i);
		if(i>0)
		{
			ArrayList al=new ArrayList();
			al.add(userName);
			al.add(userType);
			session.setAttribute("userInfo",al);
			
			req.setAttribute("title","图书查询");
			req.setAttribute("URL","//student/view/searchBook.jsp");
			
			RequestDispatcher dis=this.getServletContext().getRequestDispatcher("/login.jsp");;
			
			if(userType==1)
			{
				 dis=this.getServletContext().getRequestDispatcher("/student/index.jsp");
			}
			
			else if(userType==2)
			{
				 dis=this.getServletContext().getRequestDispatcher("/manager/index.jsp");
			}
			else
			{
				;
			}
			dis.forward(req,resp);
		}
		else
		{
			req.setAttribute("error","用户名或密码错误，请重新输入！！");
			RequestDispatcher dis=this.getServletContext().getRequestDispatcher("/login.jsp");
			dis.forward(req,resp);
		}
		
	}

	

	
}