Vorlesung 12 / Aufgabe 1

VL12/Aufgabe01/Aufgabe01.java

@@ -0,0 +1,95 @@
+package VL12.Aufgabe01;
+
+import java.io.FileWriter;
+import java.util.Random;
+
+/**
+ * Vorlesung 12 - Ein- und Ausgabe - Aufgabe 1
+ * @author Sebastian Brosch
+ */
+public class Aufgabe01 {
+  public static void main(String[] args) {
+    final String COLUMN_SEPARATOR = "#";
+    int cntDataSets = 0;
+    int startKundennummer = 0;
+
+    try {
+      System.out.print("Anzahl der Datensätze: ");
+      cntDataSets = Integer.parseInt(System.console().readLine());
+    } catch(NumberFormatException e) {
+      System.out.println("Es wurde keine gültige Anzahl für Datensätze angegeben!");
+      return;
+    }
+
+    try {
+      System.out.print("Startwert für Kundennummer: ");
+      startKundennummer = Integer.parseInt(System.console().readLine());
+    } catch(NumberFormatException e) {
+      System.out.println("Es wurde keine gültige Startnummer für die Kundennummer angegeben!");
+      return;
+    }
+
+    // the customer number have to be at least six digits.
+    if(startKundennummer < 100000) {
+      startKundennummer += 100000;
+    }
+
+    StringFeld namen = new StringFeld(getPathFromPackage() + "/input/Nachnamen.TXT");
+    StringFeld strassen = new StringFeld(getPathFromPackage() + "/input/Strassen.TXT");
+    StringFeld vornamen = new StringFeld(getPathFromPackage() + "/input/Vornamen.TXT");
+    StringFeld postleitzahlen = new StringFeld(getPathFromPackage() + "/input/PLZOrt.TXT", " ", 0);
+    StringFeld orte = new StringFeld(getPathFromPackage() + "/input/PLZOrt.TXT", " ", 1);
+
+    try {
+      FileWriter outputFixedWidth = new FileWriter(getPathFromPackage() + "/output/output-fixed-width.txt");
+      FileWriter outputSeparator = new FileWriter(getPathFromPackage() + "/output/output-separator.txt");
+
+      for(int i = 0; i < cntDataSets; i++) {
+        int kundennummer = startKundennummer + i;
+        int hausnummer = getRandomNumber(1, 99999);
+        int umsatz = getRandomNumber(500, 2000);
+
+        outputFixedWidth.write(String.format("%-6d", kundennummer));
+        outputFixedWidth.write(String.format("%-20s", namen.get(i, 20)));
+        outputFixedWidth.write(String.format("%-20s", vornamen.get(i, 20)));
+        outputFixedWidth.write(String.format("%-20s", strassen.get(i, 20)));
+        outputFixedWidth.write(String.format("%-5s", hausnummer));
+        outputFixedWidth.write(String.format("%-5s", postleitzahlen.get(i)));
+        outputFixedWidth.write(String.format("%-20s", orte.get(i, 20)));
+        outputFixedWidth.write(String.format("%-5s", umsatz));
+        outputFixedWidth.write("\n");
+
+        outputSeparator.write(String.format("%d" + COLUMN_SEPARATOR, kundennummer));
+        outputSeparator.write(String.format("%s" + COLUMN_SEPARATOR, namen.get(i)));
+        outputSeparator.write(String.format("%s" + COLUMN_SEPARATOR, vornamen.get(i)));
+        outputSeparator.write(String.format("%s" + COLUMN_SEPARATOR, strassen.get(i)));
+        outputSeparator.write(String.format("%d" + COLUMN_SEPARATOR, hausnummer));
+        outputSeparator.write(String.format("%s" + COLUMN_SEPARATOR, postleitzahlen.get(i)));
+        outputSeparator.write(String.format("%s" + COLUMN_SEPARATOR, orte.get(i)));
+        outputSeparator.write(String.format("%d", umsatz));
+        outputSeparator.write("\n");
+      }
+
+      outputFixedWidth.close();
+      outputSeparator.close();
+    } catch(Throwable e) {;}
+  }
+
+  /**
+   * Method to determine a random number from a certain range.
+   * @param start The first number of the range.
+   * @param end The last number of the range.
+   * @return A random number from a certain range.
+   */
+  private static int getRandomNumber(int start, int end) {
+    return (new Random()).nextInt(end-start) + start;
+  }
+
+  /**
+   * Method to get the relative path based on the package name.
+   * @return The relative path of the package based on the package name.
+   */
+  private static String getPathFromPackage() {
+    return Aufgabe01.class.getPackageName().replace(".", "/");
+  }
+}

VL12/Aufgabe01/StringFeld.java

@@ -0,0 +1,70 @@
+package VL12.Aufgabe01;
+
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+import java.util.List;
+
+/**
+ * A field to store some information.
+ * @author Sebastian Brosch
+ */
+class StringFeld {
+  private String[] values;
+
+  StringFeld(String filePath) {
+    List<String> lines = getFileLines(filePath);
+    this.values = new String[lines.size()];
+    lines.toArray(this.values);
+  }
+
+  StringFeld(String filePath, String separator, int index) {
+    List<String> lines = getFileLines(filePath);
+    this.values = new String[lines.size()];
+
+    for(int i = 0; i < lines.size(); i++) {
+      this.values[i] = lines.get(i).split(separator)[index];
+    }
+  }
+
+  /**
+   * Method to get a value.
+   * @param index The index of the value.
+   * @return The value of the given index.
+   */
+  public String get(int index) {
+    index = index % this.values.length;
+    return this.values[index];
+  }
+
+  /**
+   * Method to get a value.
+   * @param index The index of the value.
+   * @param maxLength The max length of the value.
+   * @return The value of the given index.
+   */
+  public String get(int index, int maxLength) {
+    index = index % this.values.length;
+
+    if(this.values[index].length() > maxLength) {
+      return this.values[index].substring(0, maxLength);
+    } else {
+      return this.values[index];
+    }
+  }
+
+  /**
+   * Method to get all the lines of a file.
+   * @param filePath The path to the file to get the lines from.
+   * @return A list with all lines of the file.
+   */
+  private List<String> getFileLines(String filePath) {
+    try {
+      return Files.readAllLines(Paths.get(filePath), StandardCharsets.ISO_8859_1);
+    } catch (IOException e) {
+      e.printStackTrace();
+      return List.of();
+    }
+  }
+}

VL12/Aufgabe01/input/Nachnamen.TXT

@@ -0,0 +1,12 @@
+Meier
+Kaiser
+Hellmann
+Fuchs
+Hampel
+Hinz
+Schmidt
+Andrack
+Zerlett
+Novincack
+Ullmann
+Mayer

VL12/Aufgabe01/input/PLZOrt.TXT

@@ -0,0 +1,25 @@
+72160 Horb
+70179 Stuttgart
+70191 Stuttgart
+70192 Stuttgart
+70193 Stuttgart
+70195 Stuttgart
+70197 Stuttgart
+70199 Stuttgart
+70327 Stuttgart
+72070 Tübingen
+72072 Tübingen
+72074 Tübingen
+72076 Tübingen
+72181 Starzach
+72182 Eutingen
+72184 Eutingen
+72185 Empfingen
+72186 Empfingen
+72186 Weiherhof
+72187 Vöhringen
+72189 Vöhringen
+72202 Nagold
+72210 Altensteig
+72213 Altensteig
+72218 Wildberg

VL12/Aufgabe01/input/Strassen.TXT

@@ -0,0 +1,11 @@
+Hauptstr.
+Dorfstr.
+Rosenweg
+Nelkenweg
+Stuttgarter Str.
+Ulmer Str.
+Freiburger Str.
+Münchner Str.
+Goetheweg
+Beethovenallee
+Schillerstr.

VL12/Aufgabe01/input/Vornamen.TXT

@@ -0,0 +1,10 @@
+Frank
+Steffi
+Uschi
+Carola
+Susanne
+Marion
+Ingo
+Stefan
+Jochen
+Holger

VL12/Aufgabe01/output/output-fixed-width.txt

@@ -0,0 +1,5 @@
+100005Meier               Frank               Hauptstr.           9374272160Horb                728  
+100006Kaiser              Steffi              Dorfstr.            1743970179Stuttgart           1914 
+100007Hellmann            Uschi               Rosenweg            1318270191Stuttgart           593  
+100008Fuchs               Carola              Nelkenweg           3436270192Stuttgart           891  
+100009Hampel              Susanne             Stuttgarter Str.    2115270193Stuttgart           926  

VL12/Aufgabe01/output/output-separator.txt

@@ -0,0 +1,5 @@
+100005#Meier#Frank#Hauptstr.#93742#72160#Horb#728
+100006#Kaiser#Steffi#Dorfstr.#17439#70179#Stuttgart#1914
+100007#Hellmann#Uschi#Rosenweg#13182#70191#Stuttgart#593
+100008#Fuchs#Carola#Nelkenweg#34362#70192#Stuttgart#891
+100009#Hampel#Susanne#Stuttgarter Str.#21152#70193#Stuttgart#926