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  • [javaEE] jsp的指令

    jsp的指令:jsp的指令(directive)是为jsp引擎而设计的,他们并不直接产生任何可见输出,而是告诉引擎如何处理jsp

    页面中的其他部分

     

    页面头部的page指令

    <%@page import="org.apache.jasper.tagplugins.jstl.core.Out"%>

    <%@page import="java.util.Date"%>

    <%@ page language="java" contentType="text/html; charset=utf-8"

    pageEncoding="utf-8"%>

     

    配置错误页面:

    <%@ page errorPage="500.jsp"%>

    web.xml

      <error-page>

       <error-code>500</error-code>

       <location>/500.jsp</location>

      </error-page>

      <error-page>

       <error-code>404</error-code>

       <location>/404.jsp</location>

      </error-page>

     

    解决中文乱码:

    <%@ page language="java" contentType="text/html; charset=utf-8"

    pageEncoding="utf-8"%>

     

    页面包含:

    <%@include file="footer.jsp" %>

     

    jsp的九大隐式对象:

    jsp页面翻译成Servlet后,在service方法中,自动为我们定义出来的九个对象

    page对象,当前Servlet对象

    config

    application

    response

    request

    session

    out

    pageContext

    final javax.servlet.jsp.PageContext pageContext;

        javax.servlet.http.HttpSession session = null;

        final javax.servlet.ServletContext application;

        final javax.servlet.ServletConfig config;

        javax.servlet.jsp.JspWriter out = null;

        final java.lang.Object page = this;

        javax.servlet.jsp.JspWriter _jspx_out = null;

        javax.servlet.jsp.PageContext _jspx_page_context = null;

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  • 原文地址:https://www.cnblogs.com/taoshihan/p/5630898.html
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