<%@ page language="java" import="java.util.*" contentType="text/html; charset=utf-8"%>
<%
  String path = request.getContextPath();
  String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
  String username="";
  String password="";
  request.setCharacterEncoding("utf-8");//防止中文乱码
  username=request.getParameter("username");
  password=request.getParameter("password");
  session.setAttribute("loginuser", "username");
  if("admin".equals(username)&&"admin".equals(password)){
      request.getRequestDispatcher("login_success.jsp");
  }
  else{
     response.sendRedirect("login_false.jsp");
  }
%>
根据课程做的登陆页面，密码输入失败这能成功跳转到login_false.jsp，如果密码输入正确就出现空白页，求解答