用Java，MySQL数据库写

为了实现一个基于Java和MySQL的仓库管理系统，你需要完成以下几个主要步骤：

### 1. 环境准备
- **依赖管理**：Maven 或 Gradle

### 2. 表结构设计
根据文档中的描述，需要设计以下表结构：

#### 用户表 (users)

CREATE TABLE users (
    id INT AUTO_INCREMENT PRIMARY KEY,
    username VARCHAR(50) NOT NULL UNIQUE,
    password VARCHAR(255) NOT NULL
);

#### 仓库表 (warehouses)

CREATE TABLE warehouses (
    id INT AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(100) NOT NULL,
    capacity INT NOT NULL,
    address VARCHAR(255) NOT NULL
);

#### 库存表 (inventories)

CREATE TABLE inventories (
    id INT AUTO_INCREMENT PRIMARY KEY,
    warehouse_id INT,
    type ENUM('常温', '低温', '高温') NOT NULL,
    max_capacity INT NOT NULL,
    used_capacity INT NOT NULL DEFAULT 0,
    warning_capacity INT NOT NULL,
    FOREIGN KEY (warehouse_id) REFERENCES warehouses(id)
);

#### 产品表 (products)

CREATE TABLE products (
    id INT AUTO_INCREMENT PRIMARY KEY,
    product_code VARCHAR(50) NOT NULL UNIQUE,
    quantity INT NOT NULL,
    expiration_date DATE NOT NULL
);

#### 库存明细表 (inventory_details)

CREATE TABLE inventory_details (
    id INT AUTO_INCREMENT PRIMARY KEY,
    inventory_id INT,
    product_id INT,
    quantity INT NOT NULL,
    FOREIGN KEY (inventory_id) REFERENCES inventories(id),
    FOREIGN KEY (product_id) REFERENCES products(id)
);

### 3. Java代码实现

#### 1. 数据访问层 (DAO)
使用JDBC连接MySQL数据库，编写DAO类来处理数据库操作。

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;

public class WarehouseDAO {
    private static final String URL = "jdbc:mysql://localhost:3306/warehouse";
    private static final String USER = "root";
    private static final String PASSWORD = "password";

    public Connection getConnection() throws Exception {
        Class.forName("com.mysql.cj.jdbc.Driver");
        return DriverManager.getConnection(URL, USER, PASSWORD);
    }

    // 示例方法：查询所有仓库
    public List<Warehouse> getAllWarehouses() {
        List<Warehouse> warehouses = new ArrayList<>();
        try (Connection conn = getConnection();
             PreparedStatement stmt = conn.prepareStatement("SELECT * FROM warehouses")) {
            ResultSet rs = stmt.executeQuery();
            while (rs.next()) {
                Warehouse warehouse = new Warehouse(
                    rs.getInt("id"),
                    rs.getString("name"),
                    rs.getInt("capacity"),
                    rs.getString("address")
                );
                warehouses.add(warehouse);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return warehouses;
    }
}

#### 2. 业务逻辑层 (Service)
编写Service类来处理业务逻辑。

public class WarehouseService {
    private WarehouseDAO warehouseDAO = new WarehouseDAO();

    public List<Warehouse> get Warehouses() {
        return warehouseDAO.getAllWarehouses();
    }

    // 其他业务方法...
}

#### 3. 控制台界面
编写主程序类，通过控制台与用户交互。

import java.util.Scanner;

public class Main {
    private static WarehouseService warehouseService = new WarehouseService();
    private static Scanner scanner = new Scanner(System.in);

    public static void main(String[] args) {
        boolean running = true;
        while (running) {
            System.out.println("1. 注册");
            System.out.println("2. 登录");
            System.out.println("3. 仓库管理");
            System.out.println("4. 库存管理");
            System.out.println("5. 退出");
            int choice = scanner.nextInt();
            switch (choice) {
                case 1:
                    registerUser();
                    break;
                case 2:
                    loginUser();
                    break;
                case 3:
                    manageWarehouse();
                    break;
                case 4:
                    manageInventory();
                    break;
                case 5:
                    running = false;
                    break;
                default:
                    System.out.println("无效的选择，请重新输入。");
            }
        }
    }

    private static void registerUser() {
        System.out.print("请输入用户名：");
        String username = scanner.next();
        System.out.print("请输入密码：");
        String password = scanner.next();
        System.out.print("请确认密码：");
        String confirmPassword = scanner.next();
        if (!password.equals(confirmPassword)) {
            System.out.println("密码不一致，请重新输入。");
            return;
        }
        // 调用UserService.register(username, password);
        System.out.println("注册成功！");
    }

    private static void loginUser() {
        System.out.print("请输入用户名：");
        String username = scanner.next();
        System.out.print("请输入密码：");
        String password = scanner.next();
        // 调用UserService.login(username, password);
        System.out.println("登录成功！");
    }

    private static void manageWarehouse() {
        boolean running = true;
        while (running) {
            System.out.println("1. 查询仓库");
            System.out.println("2. 新建仓库");
            System.out.println("3. 修改仓库");
            System.out.println("4. 删除仓库");
            System.out.println("5. 返回上级菜单");
            int choice = scanner.nextInt();
            switch (choice) {
                case 1:
                    queryWarehouses();
                    break;
                case 2:
                    createWarehouse();
                    break;
                case 3:
                    updateWarehouse();
                    break;
                case 4:
                    deleteWarehouse();
                    break;
                case 5:
                    running = false;
                    break;
                default:
                    System.out.println("无效的选择，请重新输入。");
            }
        }
    }

    private static void queryWarehouses() {
        List<Warehouse> warehouses = warehouseService.getWarehouses();
        for (Warehouse warehouse : warehouses) {
            System.out.println(warehouse);
        }
    }

    private static void createWarehouse() {
        System.out.print("请输入仓库名称：");
        String name = scanner.next();
        System.out.print("请输入仓库容量：");
        int capacity = scanner.nextInt();
        System.out.print("请输入仓库地址：");
        String address = scanner.next();
        // 调用WarehouseService.createWarehouse(name, capacity, address);
        System.out.println("新建仓库成功！");
    }

    private static void updateWarehouse() {
        System.out.print("请输入要修改的仓库ID：");
        int id = scanner.nextInt();
        System.out.print("请输入新的仓库名称：");
        String name = scanner.next();
        System.out.print("请输入新的仓库容量：");
        int capacity = scanner.nextInt();
        System.out.print("请输入新的仓库地址：");
        String address = scanner.next();
        // 调用WarehouseService.updateWarehouse(id, name, capacity, address);
        System.out.println("修改仓库成功！");
    }

    private static void deleteWarehouse() {
        System.out.print("请输入要删除的仓库ID：");
        int id = scanner.nextInt();
        // 调用WarehouseService.deleteWarehouse(id);
        System.out.println("删除仓库成功！");
    }

    private static void manageInventory() {
        // 实现库存管理相关功能
    }
}

### 4. 功能扩展
根据文档中的详细功能列表，逐步实现其他功能模块，如库存管理、产品质量预警等。

### 5. 测试
编写单元测试和集成测试，确保各个功能模块正常工作。

### 6. 部署
将应用部署到服务器，确保其稳定运行。

以上是基于Java和MySQL实现仓库管理系统的概要设计和部分代码示例。你可以根据具体需求进一步完善和优化。