Mermaid图表编辑器

classDiagram
    class PaymentRequest {
        <<abstract>>
        +String requestId
        +BigDecimal amount
        +Currency currency
        +String merchantId
        +validate() boolean
    }
    class CreditCardPaymentRequest {
        +String cardNumber
        +String cardHolder
        +Date expiryDate
        +String cvv
        +validate() boolean
        +maskCardNumber() String
    }
    class AlipayPaymentRequest {
        +String authCode
        +String buyerId
        +validate() boolean
    }
    class PaymentProcessor {
        <<interface>>
        +PaymentResult process(PaymentRequest request)
        +boolean supports(PaymentMethod method)
    }
    class CreditCardProcessor {
        +PaymentGateway gateway
        +PaymentResult process(PaymentRequest request)
        +boolean supports(PaymentMethod method)
        +refund(String transactionId)
    }
    class AlipayProcessor {
        +AlipayClient client
        +PaymentResult process(PaymentRequest request)
        +boolean supports(PaymentMethod method)
    }
    class PaymentResult {
        +boolean success
        +String transactionId
        +String message
        +Date timestamp
        +BigDecimal processedAmount
    }
    class PaymentStrategyFactory {
        <<interface>>
        -Map~PaymentMethod, PaymentProcessor~ processors
        +getProcessor(PaymentMethod method) PaymentProcessor
        +registerProcessor(PaymentMethod method, PaymentProcessor processor)
    }
    class PaymentService {
        <<interface>>
        -PaymentStrategyFactory factory
        +PaymentResult executePayment(PaymentRequest request)
        +PaymentResult refundPayment(String transactionId)
    }
    PaymentRequest <|-- CreditCardPaymentRequest
    PaymentRequest <|-- AlipayPaymentRequest
    PaymentProcessor <|.. CreditCardProcessor
    PaymentProcessor <|.. AlipayProcessor
    CreditCardProcessor ..> PaymentRequest : processes
    AlipayProcessor ..> PaymentRequest : processes
    PaymentService --> PaymentStrategyFactory
    PaymentStrategyFactory --> PaymentProcessor
    CreditCardProcessor --> PaymentResult : creates
    AlipayProcessor --> PaymentResult : creates
    note for PaymentRequest "使用策略模式
支持多种支付方式"