有如下代码------demo,jsp------<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%><% pageContext.setAttribute("info","page"); request.setAttribute("info","request"); pageContext.setAttribute("info","request2",pageContext.REQUEST_SCOPE); session.setAttribute("info","session"); pageContext.setAttribute("info","session2",pageContext.SESSION_SCOPE); application.setAttribute("info","app"); pageContext.setAttribute("info","app2",pageContext.APPLICATION_SCOPE); %>demo1.jsp------demo1.jsp----<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> info1:${pageScope.info }
info2: ${info }
info3:${sessionScope.info }
info4:${applicationScope.info } 当点击超级连接 demo1 时，在demo1.jsp页显示输出（ 1）在当前浏览器上的另一个标签，直接浏览demo1.jsp，在demo1.jsp页显示输出（ 2 ）这时打开另一浏览器，直接浏览demo1.jsp，在demo1.jsp页显示输出（ 3 ）