用户登录页面时如何在jsp程序中编写angular-toastr的代码

如何解决用户登录页面时如何在jsp程序中编写angular-toastr的代码

Hai如何在JSP Java编程中编写angulartoaster的代码，IAM尝试将会话用户名打印到Angle Toastr中，但是IAM获取用户的值，而不是在Angle Toastr上打印用户名，并且它也不是打开角度烤面包机弹出窗口。这是我的代码，请帮助我

 <link href="assets/libs/toastr/toastr.min.css" rel="stylesheet" type="text/css" />     
    <script type="text/javascript">

toastr.options = {
  "closeButton": false,"debug": false,"newestOnTop": false,"progressBar": false,"positionClass": "toast-top-right","preventDuplicates": false,"onclick": null,"showDuration": "300","hideDuration": "1000","timeOut": "5000","extendedTimeOut": "1000","showEasing": "swing","hideEasing": "linear","showMethod": "fadeIn","hideMethod": "fadeOut"
};
        var Msg ='<%=session.getAttribute("UserName")%>';
        if (Msg !== "null") 
        {
        function alertName()
        {
            toastr.options.positionClass = 'toast-bottom-right';
            toastr.success("Welcome!"+Msg);
            //alert("Welcome");
        } 
        } 
        
 </script>
<script type="text/javascript"> window.onload = alertName; </script>```