login.java

利用java编写的一个学生宿舍管理系统

/*
 *login.java
 *author:liuhaijing
 */

package mydesign;

import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import mydesign.*;

public class login extends HttpServlet
{
	
	//Initialize global variables
    public void init() throws ServletException
    {
    }
    
    //Process the HTTP Post request
	public void service(HttpServletRequest req,HttpServletResponse res)
	throws ServletException,IOException
	{
		req.setCharacterEncoding("gb2312");
		res.setContentType("text/html;charset=gb2312");
		PrintWriter pw=res.getWriter();
		Admin admin=new Admin();
		AdminControl admincontrol=new AdminControl();
		String username=req.getParameter("username");
		String password=req.getParameter("password");
		if(username.equals("")||password.equals(""))
                pw.print("<script>alert('请输入帐号和密码!');history.back()</script>");
		try
		{
			admin.setUserName(username);
       	    admin.setPassword(password);
       	    if(!admincontrol.isAdmin(admin).equals(null))
       	    {
       	    	HttpSession session=req.getSession(true);
       	    	session.setAttribute("manage",admincontrol.isAdmin(admin));
       	    	session.putValue("admin",username);
       	    	res.sendRedirect("/MyDesign/index.jsp");
       	    }else
       	    {
       	    	pw.print("<script>alert('密码错误！');history.back()</script>");
       	    }
       	}catch(Exception e)
       	{
            System.out.println("login has error"+e.getMessage());
        }
    }
    //Clean up resources
    public void destroy() 
    {
    }
}