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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246
Web アプリケーションの開発
5
遷移先の指定方法
遷移先の指定は、
View
名（遷移先に割り振られた論理的な名前）を
Handler
メソッド の 戻り値 として 返 却 す
ることで 実 現します。
View
名を返却すると、
Spring MVC
が
ViewResolver
のメソッドを呼び出して、
View
名か
ら物理的な
View
（たとえば
JSP
フ ァ イル ）を 解 決 し 、実 行 します 。
View 名を文字列として返却する実装例
@Controller
public class WelcomeController {
@RequestMapping("/")
public String home() {
return "home";
❶
}
}
❶
Handler メソッドの戻り値として View 名を返却する
たとえば
JSP
用の
ViewResolver
をデフォルトの状態で適用していると、
Web
アプリケーション内の
/WEB-
INF/home.jsp
が呼び出され、
/WEB-INF/home.jsp
で生成した
HTML
がブラウザ上に描画されます。
リクエストパスへのリダイレクト
別のリクエストパスへリダイレクトした結果を遷移先にする場合は、
View
名 に「
redirect: + リダイレクト先
のリクエストパス
」を 指 定 します 。
リダイレクトする際のView 名の指定例
@Controller
public class WelcomeController {
@GetMapping
("/")
public ...
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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.