工厂+策略设计模式

有时后经常需要写很多的if判断语句，导致了代码的十分冗余，可读性不高，下面以工厂设计模式+策略设计模式提供一种可替代的写法，简化代码

工厂类：Factory

/**
 * 工厂设计模式
 */
public class Factory {
    private static Map<String, Handler> strategyMap = Maps.newHashMap();

    public static Handler getInvokeStrategy(String name) {
        return strategyMap.get(name);
    }

    public static void register(String name, Handler handler) {
        if (StringUtils.isEmpty(name) || null == handler) {
            return;
        }
        strategyMap.put(name, handler);
    }
}

 策略接口：

import org.springframework.beans.factory.InitializingBean;

/**
 * 策略设计模式
 */
public interface Handler extends InitializingBean {

    public void AAA(String name);

}

具体实现的一些策略 KangBaHandler

@Component
public class KangBaHandler implements Handler {

    @Override
    public void AAA(String name) {
        // 业务逻辑A
        System.out.println("亢八完成任务");
    }

    @Override
    public void afterPropertiesSet() throws Exception {
        Factory.register("亢八", this);
    }
}

具体实现的一些策略 LiSiHandler

import org.springframework.stereotype.Component;

@Component
public class LiSiHandler implements Handler {

    @Override
    public void AAA(String name) {
        // 业务逻辑A
        System.out.println("李四完成任务");
    }

    @Override
    public void afterPropertiesSet() throws Exception {
        Factory.register("李四", this);
    }
}

具体实现的一些策略 TianQiHandler

import org.springframework.stereotype.Component;

@Component
public class TianQiHandler implements Handler {

    @Override
    public void AAA(String name) {
        // 业务逻辑A
        System.out.println("田七完成任务");
    }

    @Override
    public void afterPropertiesSet() throws Exception {
        Factory.register("田七", this);
    }
}

具体实现的一些策略 WangWuHandler

import org.springframework.stereotype.Component;

@Component
public class WangWuHandler implements Handler {

    @Override
    public void AAA(String name) {
        // 业务逻辑A
        System.out.println("王五完成任务");
    }

    @Override
    public void afterPropertiesSet() throws Exception {
        Factory.register("王五", this);
    }
}

具体实现的一些策略 ZhangSanHandler

import org.springframework.stereotype.Component;

@Component
public class ZhangSanHandler implements Handler {

    @Override
    public void AAA(String name) {
        // 业务逻辑A
        System.out.println("张三完成任务");
    }

    @Override
    public void afterPropertiesSet() throws Exception {
        Factory.register("张三", this);
    }
}