【设计模式】策略模式与spring结合

       在上一篇《【设计模式】策略模式》中，我们讲解了策略模式的基本概念和用法。策略模式是符合“开闭原则”的典型案例，但在上一篇文章中，我们发现，如果想调用其他的策略，虽然不用修改核心业务代码，但需要修改客户端代码。我们说，将策略的选择放在功能页面，当用户选择时，向后端传入策略，从数据库字典表中获取该策略对应的类的名字，再通过反射，获得对应的策略类。但如果不修改数据库，还有没有别的方法？当然有！

       使用spring注解！

我们将使用工厂+spring注解的方式实现！

1、工厂类

public class OrderIntegrateReadFactory {
    private final static Logger logger= LoggerFactory.getLogger(OrderIntegrateReadFactory.class);

    private Map vendeeContextStrategyMap=new HashMap();

    public Map getVendeeContextStrategyMap() {
        return vendeeContextStrategyMap;
    }

    public void setVendeeContextStrategyMap(Map vendeeContextStrategyMap) {
        this.vendeeContextStrategyMap = vendeeContextStrategyMap;
    }

    public boolean doAction(String strType, ReportDetail reportDetail, OrderDetail orderDetail){
        return this.vendeeContextStrategyMap.get(strType).getTicketContext(reportDetail,orderDetail);
    }
}

2、spring配置文件

3、接口类

public interface IVendeeContextStrategy {

    boolean getTicketContext(ReportDetail reportDetail, OrderDetail orderDetail);
}

4、具体实现类，以QunarContextStrategy策略为例

public class QunarContextStrategy implements IVendeeContextStrategy{
    private final static Logger logger= LoggerFactory.getLogger(QunarContextStrategy.class);
    HandleManage huitiePiaoHao;
    RedisManager redisManage;
    public RedisManager getRedisManage() {
        return redisManage;
    }

    public void setRedisManage(RedisManager redisManage) {
        this.redisManage = redisManage;
    }
    public HandleManage getHuitiePiaoHao() {
        return huitiePiaoHao;
    }

    public void setHuitiePiaoHao(HandleManage huitiePiaoHao) {
        this.huitiePiaoHao = huitiePiaoHao;
    }
    @Override
    public boolean getTicketContext(ReportDetail reportDetail, OrderDetail orderDetail){
       try {
           TicketContext ticketContextQunar = QunarTicketContext(reportDetail, orderDetail);
           if (ticketContextQunar != null) {
               TicketContext ticketContext=huitiePiaoHao.handle(ticketContextQunar);
               if (ticketContext.isHuitieresult()){
                   redisManage.add("vendee-"+ticketContext.getTtsorderno(),"true");
                   redisManage.expire("vendee-"+ticketContext.getTtsorderno(),600);
                   logger.info("orderintegrate huitie success data {}",JSONObject.toJSONString(ticketContext));
                   return true;
               }
           }
       }catch (Exception e){
           logger.error("orerintegrate read ticketcontext error {}",e);
            return false;
       }
        return false;
    }
 }

5、模拟客户端调用

public class StrategyPatternDemo{
   public static void main(String[] args){
     OrderIntegrateReadFactory  orderIntegrateReadFactory = new  OrderIntegrateReadFactory ();
     String type = "1";
     ReportDetail reportDetail = new ReportDetail();
     OrderDetail orderDetail = new OrderDetail();
     reportDetail.setXXX();
     orderDetail.setXXX();
     ... ...
     Boolean boolean = orderIntegrateReadFactory.doAction(strType, reportDetail,orderDetail);
  }

}

       当需求中有新的类时，我们可以在只添加策略类，修改spring的配置文件来实现啦！

代码借鉴：

https://blog.csdn.net/zlts000/article/details/54754789