Ready to get started?

Learn more about the CData JDBC Driver for MariaDB or download a free trial:

Download Now

JDBI からMariaDB Data のデータアクセスオブジェクトを作成

JDBI でMariaDB data 用のSQL オブジェクトAPIを作成する方法を概説します。

JDBI は、Fluent スタイルとSQL オブジェクトスタイルという2つの異なるスタイルAPI を公開する、Java 用のSQL コンビニエンスライブラリです。CData JDBC Driver for MariaDB は、Java アプリケーションとリアルタイムMariaDB data のデータ連携を実現します。これらの技術を組み合わせることによって、MariaDB data へのシンプルなコードアクセスが可能になります。ここでは、基本的なDAO(Data Access Object )とそれに付随するMariaDB data の読み書きのためのコードの作成について説明します。

MariaDB Orders Entity のDAO を作成

The interface below declares the desired behavior for the SQL object to create a single method for each SQL statement to be implemented.

public interface MyOrdersDAO { //insert new data into MariaDB @SqlUpdate("INSERT INTO Orders (ShipCountry, ShipCity) values (:shipCountry, :shipCity)") void insert(@Bind("shipCountry") String shipCountry, @Bind("shipCity") String shipCity); //request specific data from MariaDB (String type is used for simplicity) @SqlQuery("SELECT ShipCity FROM Orders WHERE ShipCountry = :shipCountry") String findShipCityByShipCountry(@Bind("shipCountry") String shipCountry); /* * close with no args is used to close the connection */ void close(); }

MariaDB への接続を開く

Collect the necessary connection properties and construct the appropriate JDBC URL for connecting to MariaDB.

The Server and Port properties must be set to a MariaDB server. If IntegratedSecurity is set to false, then User and Password must be set to valid user credentials. Optionally, Database can be set to connect to a specific database. If not set, the tables from all databases are reported.

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 MariaDB JDBC Driver.Either double-click the JAR file or execute the jar file from the command-line.

java -jar cdata.jdbc.mariadb.jar

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

A connection string for MariaDB will typically look like the following:

jdbc:mariadb:User=myUser;Password=myPassword;Database=NorthWind;Server=myServer;Port=3306;

Use the configured JDBC URL to obtain an instance of the DAO interface.The particular method shown below will open a handle bound to the instance, so the instance needs to be closed explicitly to release the handle and the bound JDBC connection.

DBI dbi = new DBI("jdbc:mariadb:User=myUser;Password=myPassword;Database=NorthWind;Server=myServer;Port=3306;"); MyOrdersDAO dao = dbi.open(MyOrdersDAO.class); //do stuff with the DAO dao.close();

MariaDB Data について

With the connection open to MariaDB, simply call the previously defined method to retrieve data from the Orders entity in MariaDB.

//disply the result of our 'find' method String shipCity = dao.findShipCityByShipCountry("USA"); System.out.println(shipCity);

MariaDB Data の書き方

It is also simple to write data to MariaDB, using the previously defined method.

//add a new entry to the Orders entity dao.insert(newShipCountry, newShipCity);

Since the JDBI library is able to work with JDBC connections, you can easily produce a SQL Object API for MariaDB by integrating with the CData JDBC Driver for MariaDB.Download a free trial and work with live MariaDB data in custom Java applications today.

 
 
ダウンロード