May 2024
Intermediate to advanced
752 pages
24h
Japanese
Content preview from Spring徹底入門 第2版 Spring FrameworkによるJavaアプリケーション開発
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5.10 JSP の実装
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オブジェクト名 説明
cookie
クッキーを格納した
Map
オブジェクト
initParam ServletContext
の初期化パラメータを格納した
Map
オブジェクト
pageContext
を使用すると、サーブレットAPI のクラスに直接アクセスできてしまいます。サーブ
レットAPIのクラスを直接使用すると保守性を損なう可能性があるので、むやみに使用するのは避
けるようにしましょう。
EL 関数
EL
では、
EL
式から呼び出すことができる関数（
EL
関数）を使用できます。たとえば、
JSTL
が提供している
fn:escapeXml
関数を使用すると、
XML
としてエスケープが必要な文字を実体参照文字列へ変換できます。
EL 関数を使用したJSPの実装例
<%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions" %>
<span>
${fn:escapeXml(form.memo)}
</span>
JSP の共通設定
サーブレットコンテナに対して
JSP
をどのように処理するかを指示する方法として、
web.xml
の
<jsp-config>
要素を使用することができます。
<jsp-config>
要素を使用すると、
JSP
ファイルをグル ープ化することができ、
グループ単位で
JSP
の振る舞いを制御するパラメータを設定できるようになります。
以
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.