75 lines
1.8 KiB
Java
75 lines
1.8 KiB
Java
package de.dis2011.data;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileNotFoundException;
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import java.io.IOException;
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import java.net.URISyntaxException;
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import java.net.URL;
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import java.sql.Connection;
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import java.sql.DriverManager;
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import java.sql.SQLException;
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import java.util.Properties;
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/**
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* Einfaches Singleton zur Verwaltung von Datenbank-Verbindungen.
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*
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* @author Michael von Riegen
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* @version April 2009
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*/
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class DB2ConnectionManager {
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// instance of Driver Manager
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private static DB2ConnectionManager _instance = null;
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// DB2 connection
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private Connection _con;
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/**
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* Erzeugt eine Datenbank-Verbindung
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*/
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private DB2ConnectionManager() {
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try {
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// Holen der Einstellungen aus der db2.properties Datei
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Properties properties = new Properties();
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URL url = ClassLoader.getSystemResource("db2.properties");
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FileInputStream stream = new FileInputStream(new File(url.toURI()));
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properties.load(stream);
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stream.close();
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String jdbcUser = properties.getProperty("jdbc_user");
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String jdbcPass = properties.getProperty("jdbc_pass");
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String jdbcUrl = properties.getProperty("jdbc_url");
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// Verbindung zur DB2 herstellen
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Class.forName("com.ibm.db2.jcc.DB2Driver");
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_con = DriverManager.getConnection(jdbcUrl, jdbcUser, jdbcPass);
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} catch (IOException | ClassNotFoundException | SQLException | URISyntaxException e){
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e.printStackTrace();
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}
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}
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/**
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* Liefert Instanz des Managers
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*
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* @return DB2ConnectionManager
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*/
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static DB2ConnectionManager getInstance() {
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if (_instance == null) {
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_instance = new DB2ConnectionManager();
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}
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return _instance;
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}
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/**
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* Liefert eine Verbindung zur DB2 zurC<ck
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*
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* @return Connection
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*/
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Connection getConnection() {
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return _con;
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}
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} |