JSP积累

JSTL 使用集合

http://www.runoob.com/jsp/jsp-jstl.html 包含jsp页面显示和逻辑显示的内容

< fmt:formatNumber>标签

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
<c:set var="balance" value="120000.2309" />
<p>格式化数字 (8): <fmt:formatNumber type="number" 
            pattern="#.###" value="${balance}" /></p>

0.230

< fmt:formatDate> 标签

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
<c:set var="now" value="<%=new java.util.Date()%>" />
<p>日期格式化 (7): <fmt:formatDate pattern="yyyy-MM-dd HH:mm:ss" 
            value="${now}" /></p>

2019-01-01 01:01:01

JSP 声明基本页面

<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

JSP 引入js和css 文件

<script type="text/javascript" src="https://ss1.bdstatic.com/5eN1bjq8AAUYm2zgoY3K/r/www/cache/static/protocol/https/jquery/jquery-1.10.2.min_65682a2.js"></script>
<script type="text/javascript" src="<%=basePath %>/js/login/login.js"></script>
<link rel="stylesheet" type="text/css" href="<%=basePath %>/css/common.css">

JSP 声明 JSTL

需要 maven 支持
<%@ taglib prefix=“c” uri=“http://java.sun.com/jsp/jstl/core”%>
和
<%@ taglib uri=“http://java.sun.com/jstl/core_rt” prefix=“c”%>

<%@ taglib  uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/fmt" prefix="fmt" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/functions" prefix="fn" %>

<dependency>
		<groupId>javax.servlet</groupId>
		<artifactId>jstl</artifactId>
		<version>1.2</version>
	</dependency>
	<dependency>
		<groupId>taglibs</groupId>
		<artifactId>standard</artifactId>
		<version>1.1.2</version>
	</dependency>

本页面引用其他页面

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