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Merge pull request mouredev#6186 from martinbohorquez/java#11
#11 - Java
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‎Roadmap/11 - MANEJO DE FICHEROS/java/martinbohorquez.java

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import java.io.*;
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import java.util.LinkedList;
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import java.util.List;
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import java.util.Scanner;
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import static java.lang.Double.parseDouble;
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/**
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* #11 MANEJO DE FICHEROS
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*
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* @author martinbohorquez
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*/
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public class martinbohorquez {
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private static final FileOperation operation = new FileOperation();
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private static final Scanner scanner = new Scanner(System.in);
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private static File venta;
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public static void main(String[] args) {
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String stringFile = "src/data.txt";
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String string = """
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Nombre: Martin
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Edad: 29
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Lenguaje de programación: Java
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""";
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testFile(stringFile, string);
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/*
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* DIFICULTAD EXTRA
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*/
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String fileString = "src/venta.txt";
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salesManager(fileString);
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}
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private static void testFile(String stringFile, String string) {
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File file = operation.create(stringFile);
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operation.write(file, string);
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operation.read(file);
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operation.delete(file);
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}
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private static void salesManager(String fileString) {
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boolean flag = true;
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while (flag) {
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System.out.print("""
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=========================================
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***** PROGRAMA DE GESTIÓN DE VENTAS *****
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1. Añadir producto
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2. Mostar productos
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3. Consultar producto
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4. Actualizar producto
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5. Borrar producto
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6. Calcular venta total
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7. Calcular venta por producto
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8. Salir
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""");
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System.out.print("Selecciona la opción (1, 2, 3, 4, 5, 6, 7, 8): ");
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String option = scanner.next();
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Product product = new Product();
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switch (option) {
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case "1" -> product.add(fileString);
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case "2" -> product.read(venta);
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case "3" -> product.consultar(venta);
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case "4" -> product.update(venta);
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case "5" -> product.delete(venta);
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case "6" -> product.calcularVentaTotal(venta);
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case "7" -> product.calcularVenta(venta);
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case "8" -> {
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product.deleteAll(venta);
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System.out.println("Saliendo del programa de gestión de ventas!");
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flag = false;
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}
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default -> System.out.println("Debe seleccionar un número de opción válido!");
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}
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}
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}
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private static void printFileEmpty() {
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System.out.println("El archivo se encuentra vacío, no tiene registros!");
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}
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private static void printfException(IOException e, String process) {
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System.out.printf("Error al '%s' en el archivo: '%s'%n", process, e.getMessage());
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}
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protected static class FileOperation {
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private File create(String string) {
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File file = new File(string);
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if (file.getParentFile() != null) file.getParentFile().mkdirs();// Crear la carpeta si no existe
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return file;
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}
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private void write(File file, String string) {
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try (FileWriter writer = new FileWriter(file, true); Scanner reader = new Scanner(file)) {
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writer.append(string).append(System.lineSeparator());
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if (!reader.hasNext()) System.out.printf("Archivo '%s' creado!%n", file);
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else System.out.printf("Archivo '%s' modificado!%n", file);
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} catch (IOException e) {
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printfException(e, "escribir");
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}
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}
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private void read(File file) {
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if (file == null || file.length() == 0) printFileEmpty();
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else {
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try (Scanner reader = new Scanner(file)) {
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System.out.println("Contenido del archivo: ");
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while (reader.hasNext()) System.out.println(reader.nextLine());
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} catch (FileNotFoundException e) {
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printfException(e, "leer");
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}
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}
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}
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private void delete(File file) {
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if (file != null && file.delete()) {
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if (file.getParentFile() != null && file.getParentFile().delete())
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System.out.printf("Folder '\\%s' eliminado correctamente!%n", file.getParentFile().toString());
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System.out.printf("Archivo '%s' eliminado correctamente!%n", file);
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}
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}
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}
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private static class Product {
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private String name;
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private Integer quantity;
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private Float price;
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private static void printProductNotFind(String name) {
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System.out.printf("El producto '%s' no se encuentra en el registro de ventas!%n", name);
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}
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private static void printWrongOperation(String name) {
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System.out.printf("La operación '%s' no es válida en este método!%n", name);
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}
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public Float getPrice() {
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return price;
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}
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public void setPrice(Float price) {
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this.price = price;
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}
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public Integer getQuantity() {
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return quantity;
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}
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public void setQuantity(Integer quantity) {
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this.quantity = quantity;
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}
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public String getName() {
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return name;
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}
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public void setName(String name) {
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this.name = name;
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}
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@Override
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public String toString() {
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return getName() + ", " + getQuantity() + ", " + getPrice();
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}
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public void add(String fileString) {
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setNameScanner("registrar");
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add(fileString, getName());
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}
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public void add(String fileString, String name) {
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if (!contains(venta, name)) {
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if (venta == null) venta = operation.create(fileString);
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setName(name);
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setQuantityAndPriceScan();
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operation.write(venta, toString());
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} else System.out.printf("El producto %s ya está registrado, usar la opción de actualizar!%n", name);
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}
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private void read(File venta) {
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if (venta == null || venta.length() == 0) printFileEmpty();
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else operation.read(venta);
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}
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private void consultar(File venta) {
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if (venta == null || venta.length() == 0) printFileEmpty();
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else {
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try (Scanner reader = new Scanner(venta)) {
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boolean flag = true;
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setNameScanner("consultar");
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while (flag && reader.hasNext()) {
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String productF = reader.nextLine();
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String productNameF = productF.split(", ")[0];
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if (productNameF.equals(getName())) {
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System.out.println(productF);
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flag = false;
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}
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}
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if (flag) printProductNotFind(getName());
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} catch (FileNotFoundException e) {
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printfException(e, "consultar");
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}
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}
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}
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private void update(File venta) {
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updateOrDelete(venta, "actualizar");
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}
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public void delete(File venta) {
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updateOrDelete(venta, "eliminar");
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}
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public void calcularVentaTotal(File venta) {
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if (venta == null || venta.length() == 0) printFileEmpty();
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else {
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try (Scanner reader = new Scanner(venta)) {
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double calcularTotal = 0.0;
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while (reader.hasNext()) {
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String[] components = reader.nextLine().split(", ");
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calcularTotal += parseDouble(components[1]) * parseDouble(components[2]);
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}
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System.out.printf("La venta total: %.2f%n", calcularTotal);
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} catch (FileNotFoundException e) {
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printfException(e, "calcularVentaTotal");
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}
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}
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}
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public void calcularVenta(File venta) {
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if (venta == null || venta.length() == 0) printFileEmpty();
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else {
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try (Scanner reader = new Scanner(venta)) {
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setNameScanner("consultar");
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double calcular = 0.0;
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while (reader.hasNext()) {
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String[] components = reader.nextLine().split(", ");
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if (components[0].equals(getName()))
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calcular = parseDouble(components[1]) * parseDouble(components[2]);
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}
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System.out.printf("La venta total del producto '%s': %.2f%n", getName(), calcular);
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} catch (FileNotFoundException e) {
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printfException(e, "calcularVenta");
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}
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}
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}
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private void deleteAll(File venta) {
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operation.delete(venta);
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}
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private void updateOrDelete(File venta, String operation) {
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boolean operationFlag = operation.matches("actualizar|eliminar");
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if (!operationFlag) printWrongOperation(operation);
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if (venta == null || venta.length() == 0) printFileEmpty();
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if (venta != null && operationFlag) {
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boolean flag = false;
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boolean flagUpdate = operation.equals("actualizar");
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List<String> fileContent = new LinkedList<>();
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setNameScanner(operation);
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try (BufferedReader reader = new BufferedReader(new FileReader(venta))) {
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String line;
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if (flagUpdate) setQuantityAndPriceScan();
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while ((line = reader.readLine()) != null) {
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String productNameF = line.split(", ")[0];
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if (productNameF.equals(getName())) {
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line = flagUpdate ? toString() : null;
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flag = true;
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}
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fileContent.add(line); // Actualizamos la linea de la lista
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}
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} catch (IOException e) {
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printfException(e, operation);
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}
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if (flag) {
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// Reescribimos el archivo con el contenido actualizado
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try (BufferedWriter writer = new BufferedWriter(new FileWriter(venta))) {
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for (String line : fileContent) {
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if (line != null) writer.append(line).append(System.lineSeparator());
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}
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System.out.printf("El producto '%s' se ha '%so' correctamente!%n",
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getName(), operation.substring(0, operation.length() - 2));
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} catch (IOException e) {
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printfException(e, operation);
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}
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} else printProductNotFind(getName());
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}
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}
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private void setNameScanner(String operation) {
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System.out.printf("Introduce el nombre de producto que desea %s: ", operation);
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setName(scanner.next());
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}
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private void setQuantityAndPriceScan() {
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System.out.print("Ingresar la cantidad vendida(unidades): ");
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setQuantity(scanner.nextInt());
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System.out.print("Ingresar el precio unitario de producto($): ");
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setPrice(scanner.nextFloat());
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}
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private boolean contains(File venta, String productName) {
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if (venta == null || venta.length() == 0) return false;
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try (Scanner reader = new Scanner(venta)) {
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while (reader.hasNext()) {
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String productNameF = reader.nextLine().split(", ")[0];
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if (productNameF.equals(productName)) return true;
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}
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} catch (FileNotFoundException e) {
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printfException(e, "contains");
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}
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return false;
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}
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}
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}

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