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JRuby からExcel Data にデータ連携

リアルタイムExcel data に連携するシンプルなJRuby アプリケーションを作成します。

JRuby はRuby プログラミング言語の高性能で安定した、完全にスレッド化されたJava 実装です。CData JDBC Driver for Excel を使用すると、JRuby からリアルタイムExcel data へのデータ連携を簡単に実装できます。ここでは、Excel data に接続し、クエリを実行して結果を表示する簡単なJRuby アプリを作成する方法を説明します。

Excel Data にJDBC で接続

Before creating the app, note the installation location for the JAR file for the JDBC Driver (typically C:\Program Files\CDatat\CData JDBC Driver for Excel\lib).

JRuby natively supports JDBC, so you can easily connect to Excel and execute SQL queries.Initialize the JDBC connection with the getConnection function of the java.sql.DriverManager class.

The ExcelFile, under the Authentication section, must be set to a valid Excel File.

ビルトイン接続文字列デザイナー

For assistance in constructing the JDBC URL, use the connection string designer built into the Excel JDBC Driver.Either double-click the JAR file or execute the jar file from the command-line.

java -jar cdata.jdbc.excel.jar

Fill in the connection properties and copy the connection string to the clipboard.

Below is a typical JDBC connection string for Excel:

jdbc:excel:Excel File='C:\MyExcelWorkbooks\SampleWorkbook.xlsx';

Excel Data への接続性を持つJRuby アプリを作成

Create a new Ruby file (for example: ExcelSelect.rb) and open it in a text editor.Copy the following code into your file:

require 'java' require 'rubygems' require 'C:/Program Files/CData/CData JDBC Driver for Excel 2018/lib/cdata.jdbc.excel.jar' url = "jdbc:excel:Excel File='C:\MyExcelWorkbooks\SampleWorkbook.xlsx';" conn = java.sql.DriverManager.getConnection(url) stmt = conn.createStatement rs = stmt.executeQuery("SELECT Name, Revenue FROM Sheet") while (rs.next) do puts rs.getString(1) + ' ' + rs.getString(2) end

With the file completed, you are ready to display your Excel data with JRuby.To do so, simply run your file from the command line:

jruby -S ExcelSelect.rb

Writing SQL-92 queries to Excel allows you to quickly and easily incorporate Excel data into your own JRuby applications.Download a free trial today!

 
 
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