When exiting, there is no full-screen exit, just exit the solution inside the IFRAME

<script type= "Text/javascript" >
	    //Judging if the current page is not the main frame, jump the main frame to
	  	var tagert_url = "<%= Request.getcontextpath ()%>/logincontroller/login ";

	    if (self==top) {
	    	alert ("AA");
	    	Window.location.href = Tagert_url;
	    } else{
	    	alert ("BB");
	    	Top.location.href = Tagert_url;
	    }  
</script>

Description

Taget_url: Controller required to exit the request

Self:window.self returns a reference to the current window. Equivalent to Window property

Top:window.top returns to the topmost window of the ancestors.

If you find that self is the top description is full screen, urgent need to window.location.href jump can

If not, top.location.href the outermost jump can