第3回 Excelの扱い方
Javaを使って普段の仕事をラクにするツールを作っていくこの連載。第3回は，おなじみの表計算ソフトExcelをJavaからどう扱うかを説明します。簡単な家計簿ツールの作成を通じて，JavaによるExcel操作の基礎を習得していくことにしましょう。 皆さん，こんにちは！ kikainekoです。この連載では，日々の定型的な業務をJavaで自動化してラクする方法を紹介しています。今回は，皆さんが仕事でもっともよく使用していると思われる，ExcelファイルをJavaから操作してみましょう！ 「ExcelにはVBA（Visual Basic for Applications：ExcelやWordなどMicrosoft Officeのマクロ言語）があるのに，わざわざJavaから操作する必要があるの？」と思われるかもしれません。確かに，Excelへのアクセスのしやすさだけを考えると，VBAのほうが簡単
Apache POIでExcelを操作
Apache POI(以前はJakarta POIと呼ばれていました)はJavaアプリケーションからExcelやWordなどのMicrosoft製品のフォーマットファイルを読み書きするためのAPIです。 今回は特にExcelのファイルを対象として試していきますが、Excelのファイルの読み書きではApache POIの中のHSSFとXSSFを使用します。HSSFはExcel2003までのファイルフォーマットに対応したもので、XSSFはExcel2007のOOXML(.xlsx)ファイルフォーマットに対応したものです。 Apache POI 3.6のダウンロード Apache POI 3.6のインストール クラスパスの設定
Apache POI - the Java API for Microsoft Documents
25 November 2023 - POI 5.2.5 available The Apache POI team is pleased to announce the release of 5.2.5. Several dependencies were updated to their latest versions to pick up security fixes and other improvements. A summary of changes is available in the Release Notes. A full list of changes is available in the change log. People interested should also follow the dev list to track progress. See the
MidiShare
A real-time operating system for musical applications. MidiShare has been designed in 1989 in response to problems commonly met in the development of realtime music software. It provides high level services to developers and ensures platform independance since it supports GNU/Linux, MacOS X and Windows Freely available on the Internet to developers since several years, the MidiShare development ki
<b>"Write the solo that you'd love to be able to improvise."</b>
"Impro-Visor" has been tested in the Softpedia labs using several industry-leading security solutions and found to be completely clean of adware/spyware components. To assure our visitors that Impro-Visor is clean, we have granted it with the "100% FREE" Softpedia award. [more certifications] Welcome to Impro-Visor Jazz Improvisation Advisor for the Improviser Free Open-Source Software from Harvey
Play Framework - Build Modern & Scalable Web Apps with Java and Scala
Play Framework makes it easy to build web applications with Java & Scala. Play is based on a lightweight, stateless, web-friendly architecture. Built on Pekko (Play 3) and Akka (Play 2), Play provides predictable and minimal resource consumption (CPU, memory, threads) for highly-scalable applications. Developer friendly. Make your changes and simply hit refresh! All you need is a browser and a tex
DWR - Easy Ajax for JAVA
Direct Web Remoting DWR is a Java library that enables Java on the server and JavaScript in a browser to interact and call each other as simply as possible. DWR is Easy Ajax for Java DWR will generate the JavaScript to allow web browsers to securely call into Java code almost as if it was running locally. It can marshal virtually any data including collections, POJOs, XML and binary data like imag
Asynchronous HTTP and Comet architectures - Java World
An introduction to asynchronous, non-blocking HTTP programming By Gregor Roth, JavaWorld.com, 03/20/08 Comet has popularized asynchronous non-blocking HTTP programming, making it practically indistinguishable from reverse Ajax, also known as server push. In this article, Gregor Roth takes a wider view of asynchronous HTTP, explaining its role in developing high-performance HTTP proxies and non
LDAP authentication via Lift API in Apache ESME
This blog was written by our new committer Vladimir Ivanov who implemented a feature that users have been wanting for a long time. In the first two parts of this blog series, scenarios were discussed where the authentication process was performed by the container. While it often makes sense to delegate this task to the container in order to integrate with corporate services such as Single Sign-On,
Lift Web フレームワーク :: ホーム
Lift とは Lift は、Web アプリケーションを記述するための表現力に富んだエレガントなフレームワークです。Lift アプリケーションには、次のような特徴があります。 セキュア -- Lift アプリケーションは、OWASP の10大セキュリティ脆弱性の多くをはじめ、一般的な脆弱性に対する耐性があります。 開発者中心 -- Lift アプリケーションは迅速に構築でき、簡潔で、メンテナンスが容易です。 スケーラブル -- Lift アプリケーションはパフォーマンスが高く、現実の運用でも強力な柔軟性を発揮して膨大なトラフィックを処理できます。 デスクトップアプリケーションのようにインタラクティブ -- Lift の Comet サポートはほかに例のない優れたもので、Ajax サポートも非常に簡単、しかもセキュアです。 上のような特徴を Lift がどのようにして実現しているか興味を持っ
Mixer2 – Beyond the JSP
Introduction For example, EC site that has multi tenant shopping mall or blog service site shuld have differrent design for each tenant/user but the functionality should be same. Or, for one site and one owner, but there is some request to continue changing web design for reason of marketing. Traditional approach of template engine such as JSP or velocity force you to write complex template that h
FreeMarker: Java Template Engine Library - FreeMarker vs. Velocity
Velocity is a simpler, more lightweight tool. Thus, it does not address many tasks that FreeMarker does, and its template language is less powerful in general, but it is simpler. However, we think that for most applications, working with FreeMarker is simpler than working with Velocity, since with Velocity you have to find custom tools and find various other workarounds to solve typical template a
Thymeleaf
30 July 2023: Thymeleaf 3.1.2.RELEASE has been published. See what's new in Thymeleaf 3.1 and how to migrate. Thymeleaf is a modern server-side Java template engine for both web and standalone environments. Thymeleaf's main goal is to bring elegant natural templates to your development workflow — HTML that can be correctly displayed in browsers and also work as static prototypes, allowing for stro
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jMusic - Computer music composition in Java.
Javaの常識を変えるPlay framework入門
Java技術最前線 櫻庭祐一 連載目次 ：ITpro
Build and implement a single sign-on solution
Build and implement a single sign-on solution
IBM Developer
