demo页面
<%--报错如何跳转到错误页面 --%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8" errorPage="error.jsp" isErrorPage="true"%>
<%--错误页面跳转 --%>
<%--演示如何导入java包，--%>
<%@ page import="java.util.*"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>demo1</title>
</head>
<body>
<%--静态包含一个jsp文件 --%>
<%@ include file="/header.jsp"%>
<%--报错如何跳转到错误页面 --%>
<%
List list = new ArrayList();
request.setAttribute("test", "testTex1t");
%>
<%--演示错误页面 --%>
<%--<%=1/0 --%>
<%--jsp 9个内置/隐式对象 --%>
1.out
<%
out.println("out对象");
%>
<br>
<hr>
2.pageContext
<%
//向pagecontext域存取数据
pageContext.setAttribute("pageContextText", "pageContextText");
pageContext.setAttribute("name", "alex");
%>
<%=pageContext.getAttribute("pageContextText")%>
<%
//向其他域存取数据
pageContext.setAttribute("sessionTest", "sessionTest", pageContext.SESSION_SCOPE);
pageContext.setAttribute("name", "alex2", pageContext.SESSION_SCOPE);
%>
<%=pageContext.getAttribute("sessionTest", pageContext.SESSION_SCOPE)%>
<%=session.getAttribute("sessionTest")%>
<%
//findAttribute(Stringname)---依次从pageContext域，request域，session域，application域中获 取属性，在某个域中获取后将不在向后寻找
String name = (String) pageContext.findAttribute("name");
%>
<%=name%>
<%
//获得其他域对象,例如
HttpSession isession = pageContext.getSession();
ServletRequest irequest = pageContext.getRequest();
%>
<br>
<hr>
3.request
<%
request.setAttribute("requestTest", "requestValue");
%>
<br>
<hr>
4.response
<%
response.setCharacterEncoding("UTF-8");
%>
<br>
<hr>
5.config
<%=config.getServletContext().getInitParameter("initTestText")%>
<br>
<hr>
6.session
<%=session.getAttribute("sessionTest")%>
<br>
<hr>
7.application
<%
//application=ServletContext
application.setAttribute("appSet", "appSetValue");
application.getAttribute("appSet");
%>
<br>
<hr>
8.page
<%=page.toString()%>
<br>
<hr>
9.exception 设置isErrorPage="true"才可获得
<br>
<hr>
<%
application.setAttribute("jspInclude", "jspIncludeValue");
%>
<br>
<hr>
动态包含，适合jsp文件 <br>
<jsp:include page="/jsp_include.jsp" />
</body>
</html>错误跳转页面
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8" isErrorPage="true"%>
<%--设置isErrorPage="true" jsp内置/隐式对象会出现exception对象 --%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>error</title>
</head>
<body>
<h1>错误页面！</h1>
<%=exception.fillInStackTrace()%>
</body>
</html>测试动态包含页面
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%=application.getAttribute("jspInclude") %>