Renamed de.dis2011 to de.dis2017

* includes also some smaller changes

Signed-off-by: Jim Martens <github@2martens.de>

02/src/de/dis2017/data/DB2ConnectionManager.java

@@ -0,0 +1,74 @@
+package de.dis2017.data;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.net.URISyntaxException;
+import java.net.URL;
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.SQLException;
+import java.util.Properties;
+
+/**
+ * Einfaches Singleton zur Verwaltung von Datenbank-Verbindungen.
+ * 
+ * @author Michael von Riegen
+ * @version April 2009
+ */
+class DB2ConnectionManager {
+
+	// instance of Driver Manager
+	private static DB2ConnectionManager _instance = null;
+
+	// DB2 connection
+	private Connection _con;
+
+	/**
+	 * Erzeugt eine Datenbank-Verbindung
+	 */
+	private DB2ConnectionManager() {
+		try {
+			// Holen der Einstellungen aus der db2.properties Datei
+			Properties properties = new Properties();
+			URL url = ClassLoader.getSystemResource("db2.properties");
+			FileInputStream stream = new FileInputStream(new File(url.toURI()));
+			properties.load(stream);
+			stream.close();
+
+			String jdbcUser = properties.getProperty("jdbc_user");
+			String jdbcPass = properties.getProperty("jdbc_pass");
+			String jdbcUrl = properties.getProperty("jdbc_url");
+
+			// Verbindung zur DB2 herstellen
+			Class.forName("com.ibm.db2.jcc.DB2Driver");
+			_con = DriverManager.getConnection(jdbcUrl, jdbcUser, jdbcPass);
+
+		} catch (IOException | ClassNotFoundException | SQLException | URISyntaxException e){
+			e.printStackTrace();
+		}
+
+	}
+
+	/**
+	 * Liefert Instanz des Managers
+	 * 
+	 * @return DB2ConnectionManager
+	 */
+	static DB2ConnectionManager getInstance() {
+		if (_instance == null) {
+			_instance = new DB2ConnectionManager();
+		}
+		return _instance;
+	}
+
+	/**
+	 * Liefert eine Verbindung zur DB2 zurC<ck
+	 * 
+	 * @return Connection
+	 */
+	Connection getConnection() {
+		return _con;
+	}
+
+}

02/src/de/dis2017/data/Makler.java

@@ -0,0 +1,153 @@
+package de.dis2017.data;
+
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.sql.Statement;
+
+/**
+ * Makler-Bean
+ * 
+ * Beispiel-Tabelle:
+ * CREATE TABLE makler(id INTEGER NOT NULL GENERATED ALWAYS AS IDENTITY (START WITH 1, INCREMENT BY 1, NO CACHE) PRIMARY KEY,
+ * name varchar(255),
+ * address varchar(255),
+ * login varchar(40) UNIQUE,
+ * password varchar(40));
+ */
+public class Makler {
+	private int id = -1;
+	private String name;
+	private String address;
+	private String login;
+	private String password;
+	
+	public int getId() {
+		return id;
+	}
+	
+	public void setId(int id) {
+		this.id = id;
+	}
+	
+	public String getName() {
+		return name;
+	}
+	
+	public void setName(String name) {
+		this.name = name;
+	}
+	
+	public String getAddress() {
+		return address;
+	}
+	
+	public void setAddress(String address) {
+		this.address = address;
+	}
+	
+	public String getLogin() {
+		return login;
+	}
+	
+	public void setLogin(String login) {
+		this.login = login;
+	}
+	
+	public String getPassword() {
+		return password;
+	}
+	
+	public void setPassword(String password) {
+		this.password = password;
+	}
+	
+	/**
+	 * Lädt einen Makler aus der Datenbank
+	 * @param id ID des zu ladenden Maklers
+	 * @return Makler-Instanz
+	 */
+	public static Makler load(int id) {
+		try {
+			// Hole Verbindung
+			Connection con = DB2ConnectionManager.getInstance().getConnection();
+
+			// Erzeuge Anfrage
+			String selectSQL = "SELECT * FROM makler WHERE id = ?";
+			PreparedStatement pstmt = con.prepareStatement(selectSQL);
+			pstmt.setInt(1, id);
+
+			// Führe Anfrage aus
+			ResultSet rs = pstmt.executeQuery();
+			if (rs.next()) {
+				Makler ts = new Makler();
+				ts.setId(id);
+				ts.setName(rs.getString("name"));
+				ts.setAddress(rs.getString("address"));
+				ts.setLogin(rs.getString("login"));
+				ts.setPassword(rs.getString("password"));
+
+				rs.close();
+				pstmt.close();
+				return ts;
+			}
+		} catch (SQLException e) {
+			e.printStackTrace();
+		}
+		return null;
+	}
+	
+	/**
+	 * Speichert den Makler in der Datenbank. Ist noch keine ID vergeben
+	 * worden, wird die generierte Id von DB2 geholt und dem Model übergeben.
+	 */
+	public void save() {
+		// Hole Verbindung
+		Connection con = DB2ConnectionManager.getInstance().getConnection();
+
+		try {
+			// FC<ge neues Element hinzu, wenn das Objekt noch keine ID hat.
+			if (getId() == -1) {
+				// Achtung, hier wird noch ein Parameter mitgegeben,
+				// damit spC$ter generierte IDs zurC<ckgeliefert werden!
+				String insertSQL = "INSERT INTO makler(name, address, login, password) VALUES (?, ?, ?, ?)";
+
+				PreparedStatement pstmt = con.prepareStatement(insertSQL,
+						Statement.RETURN_GENERATED_KEYS);
+
+				// Setze Anfrageparameter und fC<hre Anfrage aus
+				pstmt.setString(1, getName());
+				pstmt.setString(2, getAddress());
+				pstmt.setString(3, getLogin());
+				pstmt.setString(4, getPassword());
+				pstmt.executeUpdate();
+
+				// Hole die Id des engefC<gten Datensatzes
+				ResultSet rs = pstmt.getGeneratedKeys();
+				if (rs.next()) {
+					setId(rs.getInt(1));
+				}
+
+				rs.close();
+				pstmt.close();
+			} else {
+				// Falls schon eine ID vorhanden ist, mache ein Update...
+				String updateSQL = "UPDATE makler SET name = ?, address = ?, login = ?, password = ? WHERE id = ?";
+				PreparedStatement pstmt = con.prepareStatement(updateSQL);
+
+				// Setze Anfrage Parameter
+				pstmt.setString(1, getName());
+				pstmt.setString(2, getAddress());
+				pstmt.setString(3, getLogin());
+				pstmt.setString(4, getPassword());
+				pstmt.setInt(5, getId());
+				pstmt.executeUpdate();
+
+				pstmt.close();
+			}
+		} catch (SQLException e) {
+			e.printStackTrace();
+		}
+	}
+}