工厂+策略模式代码演示

1. 代码结构及代码

public enum EatEnum {
    
    
    eatChicken("吃鸡"),
    eatNoodles("吃面"),
    eatDonkeyFire("吃驴肉火烧");

    private final String type;

    EatEnum(String type) {
    
    
        this.type = type;
    }

    public String getType() {
    
    
        return type;
    }
}
------
public class Topic {
    
    
	private String name;

	public String getName() {
    
    
		return name;
	}

	public void setName(String name) {
    
    
		this.name = name;
	}
}
------
@Service
public class ChickenServiceImpl implements IService {
    
    
	private final String desc = "小鸡真好吃，一份16元。每次鸡肉越来越少！";

	@Override
	public String handler(Topic topic) {
    
    
		return topic.getName() + "-------->" + desc;
	}
}
------
@Service
public class DonkeyFireServiceImpl implements IService {
    
    
	private final String desc = "这里是自己付钱，现宝不用提心吊胆大家不给钱了，子松说这方便面这么贵啊！";

	@Override
	public String handler(Topic topic) {
    
    
		return topic.getName() + "-------->" + desc;
	}
}
------
@Service
public class NoodlesServiceImpl implements IService {
    
    
	private final String desc = "多加辣椒，少咸汤，总是想买个饼，每次爬坡！";

	@Override
	public String handler(Topic topic) {
    
    
		return topic.getName() + "-------->" + desc;
	}
}
------
@Service
public class EatService {
    
    
	@Resource
	private ServiceFactory serviceFactory;

	public String eat(Topic topic) {
    
    
		return serviceFactory.getService(topic.getName()).handler(topic);
	}
}
------
public interface IService {
    
    
    String handler(Topic topic);
}
------
@Service
public class ServiceFactory {
    
    

	private static final Map<String, IService> map = new ConcurrentHashMap<>();

	static {
    
    
		map.put(EatEnum.eatChicken.getType(), new ChickenServiceImpl());
		map.put(EatEnum.eatNoodles.getType(), new NoodlesServiceImpl());
		map.put(EatEnum.eatDonkeyFire.getType(), new DonkeyFireServiceImpl());
	}

	public IService getService(String type) {
    
    
		return map.get(type);
	}
}
------
class Java1230ApplicationTests {
    
    
	@Resource
	EatService eatService;

	@Test
	void contextLoads() {
    
    
		Topic topic = new Topic();
		topic.setName(EatEnum.eatChicken.getType());
		System.out.println(eatService.eat(topic));
	}
}

2.运行结果

附录

1.策略模式例子1
2.策略模式例子2

demo

public interface MoPeopleDetailConfigStrategy {
    
    
	/**
	 * 组装数据抽象处理逻辑方法
	 *
	 * @param name        String 员工名字
	 * @param content     String 配置内容
	 * @param item        MoPeopleConfigListVo.Item 数据列表
	 */
	void process(String name, String content, MoPeopleConfigListVo.Item item);
}

-------------------------
public class SecondLevelApproverStrategy implements MoPeopleDetailConfigStrategy {
    
    
	@Override
	public void process(String name, String content, MoPeopleConfigListVo.Item item) {
    
    
		StringBuilder secondLevelApprover = new StringBuilder(item.getSecondLevelApprover());
		item.setSecondLevelApprover(secondLevelApprover.append(name).append(",").toString());
		
		List<String> secondLevelApproverFeishuIdList = item.getSecondLevelApproverFeishuIdList();
		secondLevelApproverFeishuIdList.add(content);
		item.setSecondLevelApproverFeishuIdList(secondLevelApproverFeishuIdList);
	}
}
-----------------------------
public class FirstLevelApproverStrategy implements MoPeopleDetailConfigStrategy {
    
    
	@Override
	public void process(String name, String content, MoPeopleConfigListVo.Item item) {
    
    
		StringBuilder firstLevelApprover = new StringBuilder(item.getFirstLevelApprover());
		item.setFirstLevelApprover(firstLevelApprover.append(name).append(",").toString());

		List<String> firstLevelApproverFeishuIdList = item.getFirstLevelApproverFeishuIdList();
		firstLevelApproverFeishuIdList.add(content);
		item.setFirstLevelApproverFeishuIdList(firstLevelApproverFeishuIdList);
	}
}
----------------------------
略其他Strategy

Factory

public class MoPeopleDetailConfigFactory {
    
    
	private static final Map<Integer, MoPeopleDetailConfigStrategy> STRATEGY_MAP;

	static {
    
    
		STRATEGY_MAP = new HashMap<>();
		STRATEGY_MAP.put(MoConfigDetailPeopleContentTypeEnum.ABNORMAL_WORK_ORDER_INFLUENCER.getCode(), new AbnormalWorkOrderInfluencerStrategy());
		STRATEGY_MAP.put(MoConfigDetailPeopleContentTypeEnum.FIRST_LEVEL_APPROVER.getCode(), new FirstLevelApproverStrategy());
		STRATEGY_MAP.put(MoConfigDetailPeopleContentTypeEnum.SECOND_LEVEL_APPROVER.getCode(), new SecondLevelApproverStrategy());
		STRATEGY_MAP.put(MoConfigDetailPeopleContentTypeEnum.OPER.getCode(), new OpUserStrategy());
		STRATEGY_MAP.put(MoConfigDetailPeopleContentTypeEnum.DEPARTMENTAL_SURPLUS.getCode(), new DepartmentalSurplusStrategy());
	}

	public static MoPeopleDetailConfigStrategy createStrategy(Integer contentType) {
    
    
		return STRATEGY_MAP.get(contentType);
	}
}

MoPeopleDetailConfigStrategy strategy = MoPeopleDetailConfigFactory.createStrategy(contentType);
	if (strategy != null) {
    
    
	    strategy.process(name, content, item);
	}