策略模式

1. 策略类接口或抽象定义

public interface IStrategy {
    void operate();
}

2. 策略类接口或抽象定义实现类

public class ConcreteStrategy implements IStrategy {
    @Override
    public void operate() {
        //具体逻辑处理
    }
}

3. 封装角色调用

public class Context {
    private IStrategy strategy;
    public Context(IStrategy strategy) {
        this.strategy = strategy;
    }
    public void doSomething() {
        this.strategy.operate();
    }
}

4. 场景使用

    //具体策略对象
    IStrategy strategy = new ConcreteStrategy();
    //封装角色对象
    Context context = new Context(strategy);
    //执行
    context.execute();