Java 实现资产管理系统的具体代码

以下是一个简单的 Java 实现资产管理系统的代码示例，包括了资产的添加、查询、修改和删除等基本功能：

import java.util.*;

class Asset {
    private String name;
    private String category;
    private String purchaseDate;
    private double purchasePrice;

    public Asset(String name, String category, String purchaseDate, double purchasePrice) {
        this.name = name;
        this.category = category;
        this.purchaseDate = purchaseDate;
        this.purchasePrice = purchasePrice;
    }

    public String getName() {
        return name;
    }

    public String getCategory() {
        return category;
    }

    public String getPurchaseDate() {
        return purchaseDate;
    }

    public double getPurchasePrice() {
        return purchasePrice;
    }

    public void setName(String name) {
        this.name = name;
    }

    public void setCategory(String category) {
        this.category = category;
    }

    public void setPurchaseDate(String purchaseDate) {
        this.purchaseDate = purchaseDate;
    }

    public void setPurchasePrice(double purchasePrice) {
        this.purchasePrice = purchasePrice;
    }

    public String toString() {
        return name + " (Category: " + category + ", Purchase Date: " + purchaseDate + ", Purchase Price: " + purchasePrice + ")";
    }
}

class AssetManager {
    private List<Asset> assets;

    public AssetManager() {
        assets = new ArrayList<Asset>();
    }

    public void addAsset(Asset asset) {
        assets.add(asset);
    }

    public void removeAsset(Asset asset) {
        assets.remove(asset);
    }

    public List<Asset> getAssets() {
        return assets;
    }

    public List<Asset> searchAssets(String name, String category, String purchaseDate, double minPrice, double maxPrice) {
        List<Asset> result = new ArrayList<Asset>();
        for (Asset asset : assets) {
            if ((name == null || asset.getName().contains(name)) &&
                (category == null || asset.getCategory().equals(category)) &&
                (purchaseDate == null || asset.getPurchaseDate().equals(purchaseDate)) &&
                (asset.getPurchasePrice() >= minPrice && asset.getPurchasePrice() <= maxPrice)) {
                result.add(asset);
            }
        }
        return result;
    }

    public void modifyAsset(Asset asset, String name, String category, String purchaseDate, double purchasePrice) {
        asset.setName(name);
        asset.setCategory(category);
        asset.setPurchaseDate(purchaseDate);
        asset.setPurchasePrice(purchasePrice);
    }
}

public class AssetManagementSystem {
    public static void main(String[] args) {
        AssetManager assetManager = new AssetManager();

        // 添加资产
        Asset asset1 = new Asset("笔记本电脑", "电子产品", "2022-01-01", 5999.99);
        Asset asset2 = new Asset("投影仪", "办公设备", "2022-01-02", 2999.99);
        assetManager.addAsset(asset1);
        assetManager.addAsset(asset2);

        // 查询资产
        List<Asset> result1 = assetManager.searchAssets("电脑", null, null, 0, Double.MAX_VALUE);
        System.out.println("查询结果1：");
        for (Asset asset : result1) {
            System.out.println(asset);
        }

        // 修改资产
        assetManager.modifyAsset(asset1, "苹果电脑", "电子产品", "2022-01-03", 8999.99);
        System.out.println("修改后的资产1：");
        System.out.println(asset1);

        // 删除资产
        assetManager.removeAsset(asset2);
        System.out.println("删除后的资产列表：");
        List<Asset> result2 = assetManager.getAssets();
        for (Asset asset : result2) {
            System.out.println(asset);
        }
    }
}

在上面的代码中，我们定义了一个 `Asset` 类来表示资产，包括资产的名称、分类、购买日期和购买价格等信息。我们还定义了一个 `AssetManager` 类来管理资产，包括添加资产、删除资产、查询资产和修改资产等功能。在 `AssetManager` 类中，我们使用了一个 `List` 来存储所有的资产，并提供了一些方法来对这些资产进行操作。在 `main` 函数中，我们演示了如何使用这些功能来管理资产。