<%
	Student student1=new Student(1,"张三","123");
	Student student2=new Student(2,"张1","123");
	Student student3=new Student(3,"张2","123");
	Student student4=new Student(4,"张4","123");
	 pageContext.setAttribute("student", student1);
	 request.setAttribute("student",student2);
         session.setAttribute("student", student3);
	 application.setAttribute("student", student4);
%>
	${student}<br>
	${pageScope.student.name}<br>
	${requestScope.student }<br>
	${sessionScope.student.id }<br>
	${applicationScope.student.password }<br>