![](https://cos-cdn.shuashuati.com/pipixue-wap/2020-1230-1107-56/ti_inject-812ce.png)
有如下代码 ------demo,jsp------ 测试 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---- My JSP 'demo.jsp' starting page 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 )