策略模式

1. 定义一个接口
2. 具体的实现类去实现这个接口
3. 定义策略类

枚举类
`package com.lew.group.strategy.demo2;

/**

• @Author: lew

• @Date: 2022-3-29/21:30
  /
  public enum PaymentEnum {
  /*

  • 支付方式
    */
    Alipay(1,"Alipay"),
    WeChat(2,"WeChat"),
    CreditCard(3,"CreditCard")
    ;

  private final Integer payCode;

  private final String payType;

  public Integer getPayCode() {
  return payCode;
  }

  public String getPayType() {
  return payType;
  }

  PaymentEnum(Integer payCode, String payType) {

   this.payCode = payCode;
   this.payType = payType;
  

  }

  public static String getPayType(Integer payCode) {
  for (PaymentEnum obj : PaymentEnum.values()) {
  if (payCode.equals(obj.getPayCode())) {
  return obj.getPayType();
  }
  }
  return null;
  }

}`