#11 - Java

Author: danhingar

Roadmap/11 - MANEJO DE FICHEROS/java/danhingar.java

@@ -0,0 +1,123 @@
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.StandardOpenOption;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Scanner;
+
+public class danhingar {
+
+    public static void main(String[] args) throws IOException {
+        try {
+            String content = """
+                    Nombre:   Daniel
+                    Edad:     27
+                    Lenguaje: Java
+                    """;
+
+            Path path = Path.of("danhingar.txt");
+            Files.writeString(path, content);
+
+            Files.readAllLines(path).forEach(line -> System.out.println(line));
+
+            Files.delete(path);
+        } catch (Exception e) {
+            System.out.println("Se ha producido un error");
+        }
+
+        salesManager();
+    }
+
+    List<Product> products = new ArrayList<>();
+
+    // Extra
+    private static void salesManager() throws IOException {
+        Path path = Path.of("stockManager1.txt");
+        Files.writeString(path, "");
+        while (Boolean.TRUE) {
+            Scanner sc = new Scanner(System.in);
+            System.out.println("1. Añadir producto");
+            System.out.println("2. Consultar producto");
+            System.out.println("3. Actualizar producto");
+            System.out.println("4. Eliminar producto");
+            System.out.println("5. Mostrar productos");
+            System.out.println("6. Calcular venta total");
+            System.out.println("7. Calcular venta total por producto");
+            System.out.println("8. Salir");
+            System.out.print("Selecciona una opción: ");
+            String option = sc.nextLine();
+            switch (option) {
+                case "1":
+                    System.out.print("Nombre: ");
+                    String name = sc.nextLine();
+                    System.out.print("Cantidad: ");
+                    String quantity = sc.nextLine();
+                    System.out.print("Precio: ");
+                    String price = sc.nextLine();
+                    String product = String.format("%s, %s, %s \n", name, quantity, price);
+                    Files.writeString(path, product, StandardOpenOption.APPEND);
+                    break;
+                case "2":
+                    System.out.print("Buscar el producto: ");
+                    String searchName = sc.nextLine();
+                    String[] result = Files.readAllLines(path).stream().map(r -> r.trim().split(","))
+                            .filter(array -> array[0].equalsIgnoreCase(searchName)).findFirst().orElse(null);
+                    System.out.println(result != null ? String.format("%s,%s,%s", result[0], result[1], result[2])
+                            : "No existe el producto " + searchName);
+                    break;
+                case "3":
+                    System.out.print("Nombre: ");
+                    String name1 = sc.nextLine();
+                    System.out.print("Cantidad: ");
+                    String quantity1 = sc.nextLine();
+                    System.out.print("Precio: ");
+                    String price1 = sc.nextLine();
+                    String content = "";
+                    for (String line : Files.readAllLines(path)) {
+                        if (line.trim().split(",")[0].equalsIgnoreCase(name1)) {
+                            content = content.concat(String.format("%s, %s, %s \n", name1, quantity1, price1));
+                        } else {
+                            content = content.concat(line + "\n");
+                        }
+                    }
+                    Files.writeString(path, content);
+                    break;
+                case "4":
+                    System.out.print("Eliminar el producto: ");
+                    String deleteName = sc.nextLine();
+                    String lines = Files.readAllLines(path).stream().map(r -> r.trim().split(","))
+                            .filter(array -> !array[0].equalsIgnoreCase(deleteName))
+                            .map(x -> String.format("%s, %s, %s \n", x[0], x[1], x[2])).reduce(String::concat)
+                            .orElse("");
+                    Files.writeString(path, lines);
+                    break;
+                case "5":
+                    Files.readAllLines(path).forEach(line -> System.out.println(line));
+                    break;
+                case "6":
+                    Double totalSales = Files.readAllLines(path).stream().map(l -> l.trim().split(","))
+                            .map(h -> Double.parseDouble(h[1]) * Double.parseDouble(h[2]))
+                            .mapToDouble(Double::doubleValue).sum();
+                    System.out.println("Ventas totales: " + totalSales);
+                    break;
+                case "7":
+                    System.out.print("Nombre el producto: ");
+                    String nameProduct = sc.nextLine();
+                    Files.readAllLines(path).stream().map(l -> l.trim().split(","))
+                            .filter(array -> array[0].equalsIgnoreCase(nameProduct))
+                            .forEach(element-> System.out.println("Ventas totales de " +nameProduct+" : " + Double.parseDouble(element[1]) * Double.parseDouble(element[2])));
+                    break;
+                case "8":
+                    sc.close();
+                    Files.delete(path);
+                    System.exit(0);
+                    break;
+
+                default:
+                    System.out.println("Opción no válida");
+                    break;
+            }
+        }
+    }
+}