103 lines
4.2 KiB
Java
103 lines
4.2 KiB
Java
package VL12.Aufgabe01;
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import java.io.File;
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import java.io.FileWriter;
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import java.util.Random;
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/**
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* Vorlesung 12 - Ein- und Ausgabe - Aufgabe 1
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* @author Sebastian Brosch
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* @see https://gitea.hb.dhbw-stuttgart.de/sebastianbrosch/VL-Programmieren/src/branch/main/VL12/Aufgabe01
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*/
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public class Aufgabe01 {
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public static void main(String[] args) {
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final String COLUMN_SEPARATOR = "#";
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final int START_KUNDENNUMMER = 100000;
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int cntDataSets = 0;
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do {
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try {
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System.out.print("Anzahl der Datensätze: ");
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cntDataSets = Integer.parseInt(System.console().readLine());
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// only positive numbers are valid.
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if(cntDataSets <= 0) {
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System.out.println("Bitte geben Sie eine gültige Anzahl ein (min. 1)!");
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}
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} catch(NumberFormatException e) {
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System.out.println("Es wurde keine gültige Anzahl Datensätze eingegeben!");
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}
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} while(cntDataSets <= 0);
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StringFeld namen = new StringFeld(getPathFromPackage() + "/input/Nachnamen.TXT");
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StringFeld strassen = new StringFeld(getPathFromPackage() + "/input/Strassen.TXT");
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StringFeld vornamen = new StringFeld(getPathFromPackage() + "/input/Vornamen.TXT");
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StringFeld postleitzahlen = new StringFeld(getPathFromPackage() + "/input/PLZOrt.TXT", " ", 0);
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StringFeld orte = new StringFeld(getPathFromPackage() + "/input/PLZOrt.TXT", " ", 1);
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// create missing output folder.
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final String folderOutput = getPathFromPackage() + "/output/";
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final File fileOutputFixedWidth = new File(folderOutput + "output-fixed-width.txt");
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final File fileOutputSeparator = new File(folderOutput + "output-separator.txt");
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final File parentFolder = fileOutputFixedWidth.getParentFile();
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if(null != parentFolder) {
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parentFolder.mkdirs();
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}
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try {
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FileWriter outputFixedWidth = new FileWriter(fileOutputFixedWidth);
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FileWriter outputSeparator = new FileWriter(fileOutputSeparator);
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for(int i = 0; i < cntDataSets; i++) {
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int kundennummer = START_KUNDENNUMMER + i;
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int hausnummer = getRandomNumber(1, 99999);
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int umsatz = getRandomNumber(500, 2000);
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outputFixedWidth.write(String.format("%-6d", kundennummer));
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outputFixedWidth.write(String.format("%-20s", namen.get(i, 20)));
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outputFixedWidth.write(String.format("%-20s", vornamen.get(i, 20)));
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outputFixedWidth.write(String.format("%-20s", strassen.get(i, 20)));
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outputFixedWidth.write(String.format("%-5s", hausnummer));
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outputFixedWidth.write(String.format("%-5s", postleitzahlen.get(i)));
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outputFixedWidth.write(String.format("%-20s", orte.get(i, 20)));
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outputFixedWidth.write(String.format("%-5s", umsatz));
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outputFixedWidth.write("\n");
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outputSeparator.write(String.format("%d" + COLUMN_SEPARATOR, kundennummer));
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outputSeparator.write(String.format("%s" + COLUMN_SEPARATOR, namen.get(i)));
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outputSeparator.write(String.format("%s" + COLUMN_SEPARATOR, vornamen.get(i)));
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outputSeparator.write(String.format("%s" + COLUMN_SEPARATOR, strassen.get(i)));
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outputSeparator.write(String.format("%d" + COLUMN_SEPARATOR, hausnummer));
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outputSeparator.write(String.format("%s" + COLUMN_SEPARATOR, postleitzahlen.get(i)));
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outputSeparator.write(String.format("%s" + COLUMN_SEPARATOR, orte.get(i)));
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outputSeparator.write(String.format("%d", umsatz));
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outputSeparator.write("\n");
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}
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outputFixedWidth.close();
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outputSeparator.close();
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} catch(Throwable e) {;}
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System.out.println("Die Testdaten (" + cntDataSets + " Zeilen) wurden erzeugt.");
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}
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/**
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* Method to determine a random number from a certain range.
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* @param start The first number of the range.
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* @param end The last number of the range.
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* @return A random number from a certain range.
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*/
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private static int getRandomNumber(int start, int end) {
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return (new Random()).nextInt(end-start) + start;
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}
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/**
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* Method to get the relative path based on the package name.
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* @return The relative path of the package based on the package name.
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*/
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private static String getPathFromPackage() {
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return Aufgabe01.class.getPackageName().replace(".", "/");
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}
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}
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