<%@ page language="java" contentType="text/html; charset=UTF-8"%>
pageContext
pageContext.set|get|findAttribute 设置、提取、查找属性
<%
//获取request对象
HttpServletRequest req = (HttpServletRequest) pageContext
.getRequest();
// pageContext包含Request和Response
// HttpServletResponse resp = (HttpServletResponse) pageContext.getResponse();
//设置page范围内属性
pageContext.setAttribute("书名", "《Java程序设计》",pageContext.PAGE_SCOPE);
//设置request范围内属性
req.setAttribute("书名", "《Java Web程序设计》");
pageContext.setAttribute("书名2", "《Java Web程序设计》(第2版)",pageContext.REQUEST_SCOPE);
//设置session范围内属性
pageContext.setAttribute("图书名", "《Java Sesion详解》", pageContext.SESSION_SCOPE);
//获得的page范围属性
String str1 = (String)pageContext.getAttribute("书名",
pageContext.PAGE_SCOPE);
//获得的request范围属性
String str2 = (String)pageContext.getAttribute("书名",
pageContext.REQUEST_SCOPE);
String str3 = (String)pageContext.getAttribute("书名2",
pageContext.REQUEST_SCOPE);
//获得的request范围属性
String str4 = (String)pageContext.getAttribute("图书名",
pageContext.SESSION_SCOPE);
//获得的默认范围属性
String str5 = (String)pageContext.getAttribute("书名");
String str6 = (String)pageContext.findAttribute("书名");
%>
<%="page范围 getAttribute(\"书名\")："+str1 %>
<%="request范围 getAttribute(\"书名\")："+str2 %>
<%="request范围 getAttribute(\"书名2\")："+str3 %>
<%="session范围 getAttribute(\"图书名\")："+str4 %>
<%="pageContext.getAttribute(\"书名\")："+str5 %>
<%="pageContext.findAttribute(\"书名\")："+str6 %>