Java Tutorial/JSP/Variable — различия между версиями
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Текущая версия на 05:07, 1 июня 2010
Содержание
Creating a Variable
<HTML>
<HEAD>
<TITLE>Creating a Variable</TITLE>
</HEAD>
<BODY>
<H1>Creating a Variable</H1>
<%
int days;
days = 365;
out.println("Number of days = " + days);
%>
</BODY>
</HTML>
Define variable and reference it later
<%--
Copyright (c) 2002 by Phil Hanna
All rights reserved.
You may study, use, modify, and distribute this
software for any purpose provided that this
copyright notice appears in all copies.
This software is provided without warranty
either expressed or implied.
--%>
<%!
static final String[] COLORS = {
"#CA9A26",
"#3BF428",
"#F7E339",
"#FF40FF",
};
%>
<%
for (int i = 0; i < COLORS.length; i++) {
String color = COLORS[i];
%>
<div style="background-color: <%= color%>;
font-size: 12pt;
font-weight: bold;">
This is color <%= color %>
</div>
<% } %>
Page counter
<%@ page language="java" contentType="text/html" %>
<%!
int globalCounter = 0;
%>
<html>
<head>
<title>A page with a counter</title>
</head>
<body bgcolor="white">
This page has been visited: <%= ++globalCounter %> times.
<P>
<%
int localCounter = 0;
%>
This counter never increases its value: <%= ++localCounter %>
</body>
</html>
Reference variable
<%--
Copyright (c) 2002 by Phil Hanna
All rights reserved.
You may study, use, modify, and distribute this
software for any purpose provided that this
copyright notice appears in all copies.
This software is provided without warranty
either expressed or implied.
--%>
<%@ page session="false" %>
<%
int value = 3;
%>
<P>The value is <%= value %></p>
<%
value += 2;
%>
<P>After adding 2, the value is <%= value %></p>
