有如下代码 ------demo.jsp---- HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 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---- HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> My JSP 'demo.jsp' starting page info1:${pageScope.info } info2: ${info } info3:${sessionScope.info } info4:${applicationScope.info } 在demo1.jsp页面输出显示的结果是:(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 )