loginservlet.java

选课系统,基于SSH2的选课系统,欢迎下载

package xiong.gang.servlet;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import xiong.gang.dao.DataDAO;
import xiong.gang.util.MD5;

@SuppressWarnings("serial")
public class loginservlet extends HttpServlet {
	DataDAO data;
	public loginservlet() {
		super();
	}


	@Override
	public void init() throws ServletException {
		data=new DataDAO();
	}


	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		String role=request.getParameter("radiobutton");
		String uname=request.getParameter("uname");
		String upassword=request.getParameter("upassword");
		String validate=request.getParameter("validate");
		String ver2 = (String)request.getSession().getAttribute("rand");
		String ver3=ver2.toLowerCase();
		DataDAO data=new DataDAO();
		MD5 md5=new MD5();
		String flag=data.login(uname, md5.getkeyBeanofStr(upassword), role);
		 if (!(validate.equals(ver3))){
			request.setAttribute("validateerror","false");
			request.getRequestDispatcher("login.jsp").forward(request,response);
		 } else if(!(flag.equals(""))){
			 String allname=data.getname(uname,role);
			 if("student".equals(flag)){
				 allname=allname+"同学";
				 request.getSession().setAttribute("sno", uname);
				 request.getSession().setAttribute("sname", allname);
				 request.getRequestDispatcher("filter/studentloginsuccess.jsp").forward(request,response);
			 }
			 if("teacher".equals(flag)){
				 allname=allname+"老师";
				 request.getSession().setAttribute("tno", uname);
				 request.getSession().setAttribute("tname", allname);
				 request.getRequestDispatcher("filter/teacherloginsuccess.jsp").forward(request,response);
			 }
			 if("manager".equals(flag)){
				 allname=allname+"管理员";
				 request.getSession().setAttribute("mno", uname);
				 request.getSession().setAttribute("mname", allname);
				 request.getRequestDispatcher("filter/managerloginsuccess.jsp").forward(request,response);
			 }			
		 }else{
			 request.setAttribute("error","false");
			 request.getRequestDispatcher("login.jsp").forward(request,response);
		 }
	}


	@Override
	public void destroy() {
		//data.cloes();
	}
}