PErsisitenz übernommen und erstellt

Bank-BeispielMeins/src/infrastruktur/Persistenz.java

@@ -0,0 +1,33 @@
+package infrastruktur;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
+
+public class Persistenz {
+
+	private static final String BANK_DATEI = "-bank-data.ser";
+	
+	public static boolean sindDatenGespeichert(String name) {
+		return new File(name + BANK_DATEI).exists();
+	}
+
+	public static void speichereBankDaten(Object bank, String name) throws Exception {
+		ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(name + BANK_DATEI));
+		oos.writeObject(bank);
+		oos.close();
+	}
+	
+	public static Object ladeBankDaten(String name) throws Exception {
+		ObjectInputStream ois = new ObjectInputStream(new FileInputStream(name + BANK_DATEI));
+		Object bank = ois.readObject();
+		ois.close();
+		
+		return bank;
+	}
+
+
+
+}