简易仓库管理系统java不用数据库

好的，我可以为您提供一个简单的Java仓库管理系统示例，不需要使用数据库。以下是一个简单的基于Java的仓库管理系统的示例，它使用文件来存储数据：

import java.io.*;
import java.util.*;

public class InventorySystem {
    private static final String FILE_PATH = "inventory.txt";
    private static final String DELIMITER = ",";
    private static List<Item> inventory = new ArrayList<>();

    public static void main(String[] args) {
        loadData();
        Scanner scanner = new Scanner(System.in);

        while (true) {
            System.out.println("Enter a command ('add', 'remove', 'list', 'exit'): ");
            String command = scanner.nextLine();

            switch (command) {
                case "add":
                    addItem(scanner);
                    break;
                case "remove":
                    removeItem(scanner);
                    break;
                case "list":
                    listItems();
                    break;
                case "exit":
                    saveData();
                    System.exit(0);
                default:
                    System.out.println("Invalid command.");
                    break;
            }
        }
    }

    private static void loadData() {
        try (BufferedReader reader = new BufferedReader(new FileReader(FILE_PATH))) {
            String line;
            while ((line = reader.readLine()) != null) {
                String[] data = line.split(DELIMITER);
                int id = Integer.parseInt(data[0]);
                String name = data[1];
                int quantity = Integer.parseInt(data[2]);
                double price = Double.parseDouble(data[3]);
                inventory.add(new Item(id, name, quantity, price));
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private static void saveData() {
        try (BufferedWriter writer = new BufferedWriter(new FileWriter(FILE_PATH))) {
            for (Item item : inventory) {
                writer.write(item.getId() + DELIMITER + item.getName() + DELIMITER + item.getQuantity() +
                        DELIMITER + item.getPrice());
                writer.newLine();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private static void addItem(Scanner scanner) {
        System.out.println("Enter item name: ");
        String name = scanner.nextLine();

        System.out.println("Enter item quantity: ");
        int quantity = scanner.nextInt();
        scanner.nextLine();

        System.out.println("Enter item price: ");
        double price = scanner.nextDouble();
        scanner.nextLine();

        int id = inventory.size() + 1;
        inventory.add(new Item(id, name, quantity, price));
        System.out.println("Item added successfully.");
    }

    private static void removeItem(Scanner scanner) {
        System.out.println("Enter item ID to remove: ");
        int id = scanner.nextInt();
        scanner.nextLine();

        boolean removed = inventory.removeIf(item -> item.getId() == id);
        if (removed) {
            System.out.println("Item removed successfully.");
        } else {
            System.out.println("Item not found.");
        }
    }

    private static void listItems() {
        System.out.println("ID\tName\tQuantity\tPrice");
        for (Item item : inventory) {
            System.out.println(item.getId() + "\t" + item.getName() + "\t" + item.getQuantity() + "\t\t" +
                    item.getPrice());
        }
    }

    private static class Item {
        private int id;
        private String name;
        private int quantity;
        private double price;

        public Item(int id, String name, int quantity, double price) {
            this.id = id;
            this.name = name;
            this.quantity = quantity;
            this.price = price;
        }

        public int getId() {
            return id;
        }

        public String getName() {
            return name;
        }

        public int getQuantity() {
            return quantity;
        }

        public void setQuantity(int quantity) {
            this.quantity = quantity;
        }

        public double getPrice() {
            return price;
        }

        public void setPrice(double price) {
            this.price = price;
        }
    }
}

该程序使用一个简单的文本文件来保存库存信息。每个项目都有一个ID、名称、数量和价格。用户可以通过添加、删除和列出项目来管理库存。

在程序中，`loadData()` 方法从文件中加载数据，`saveData()` 方法将数据写回文件中。`addItem()` 方法允许用户添加新项目，`removeItem()` 方法允许用户删除项目，`listItems()` 方法显示当前库存清单。

请注意，该示例程序只是一个基本示例，可以根据需要进行修改和扩展，例如添加验证、输入错误处理和其他功能。