在Java中如何开发个人财务管理工具_财务管理工具项目实践解析

public class Transaction {
    private double amount;
    private String type; // "income" 或 "expense"
    private String category;
    private String date;
    private String note;

    // 构造函数、getter/setter 方法
}

public class FinanceManager {
    private List<Transaction> transactions;

    public void addTransaction(Transaction t) { ... }
    public void listTransactions() { ... }
    public double getTotalBalance() { ... }
    public Map<String, Double> getExpenseByCategory() { ... }
}

public class DataStorage {
    private static final String FILE_PATH = "transactions.csv";

    public static void saveTransactions(List<Transaction> list) { ... }
    public static List<Transaction> loadTransactions() { ... }
}

public static void main(String[] args) {
    FinanceManager fm = new FinanceManager();
    Scanner sc = new Scanner(System.in);

    // 启动时加载已有数据
    fm.loadFromDisk();

    while (true) {
        System.out.println("1. 添加收入  2. 添加支出  3. 查看账单  4. 统计分类  5. 查询余额  6. 退出");
        int choice = sc.nextInt();
        switch (choice) {
            case 1:
                // 收集输入，创建收入 transaction
                fm.addTransaction(...);
                break;
            case 3:
                fm.listTransactions();
                break;
            // 其他选项...
        }
    }
}

100.0,income,工资,2025-04-05,本月薪水
50.0,expense,餐饮,2025-04-05,午餐