<%@page contentType="text/html;charset=UTF-8" %>
<%
    request.setCharacterEncoding("UTF-8");
    String name = (String)request.getParameter("username");
    String password = (String)request.getParameter("password");
    if(name==null||password==null){
    out.print("<script>alert('用户名或密码不能为空！');</script>");
%>
<jsp:forward page="login.jsp"/>
<%
    }
    if(name.equals("samuelson")&&password.equals("000000")){
%>
<jsp:forward page="success.jsp"/>
<%
    }else{
//我这句话执行不出，怎么回事呢
    out.print("<script>alert('用户名或密码错误！');</script>");
%>
<jsp:forward page="login.jsp"/>
<%
    }
%>