java策略模式开发步骤

[java开发小白]

（1）写一个共有的接口和类型获取接口，需要干的事情

package com.winter.strategy;

/**
 * Created with IntelliJ IDEA.
 * Description:策略分配中心基础接口
 *
 * @PROJECT_NAME: StudySpringBootProject
 * @author: LiYong
 * @date: 2019-01-22 10:37
 */
public interface ICacludeCenter {
    public ICacludeService getCacludeService(int type);
}

package com.winter.strategy;

/**
 * Created with IntelliJ IDEA.
 * Description:基础接口
 *
 * @PROJECT_NAME: StudySpringBootProject
 * @author: LiYong
 * @date: 2019-01-22 10:33
 */
public interface ICacludeService {

    public int calculate(int a,int b);

    public int getType();
}

（2）实现这个接口的抽象类，抽象类可以包含共有的业务逻辑

package com.winter.strategy.impl;

import com.winter.strategy.ICacludeService;

/**
 * Created with IntelliJ IDEA.
 * Description:抽象类，可以添加每一种实现公共的业务方法或者其它
 *
 * @PROJECT_NAME: StudySpringBootProject
 * @author: LiYong
 * @date: 2019-01-22 10:39
 */
public class AbstractICacludeService implements ICacludeService {
    @Override
    public int calculate(int a, int b) {
        return 0;
    }

    @Override
    public  int getType() {
        return 0;
    }
}

（3）写一个具体的实现类，继承抽象类

package com.winter.strategy.impl.strategyimpl;

import com.winter.strategy.impl.AbstractICacludeService;
import org.springframework.stereotype.Service;

/**
 * Created with IntelliJ IDEA.
 * Description:针对共同接口进行的不行实现之一
 *
 * @PROJECT_NAME: StudySpringBootProject
 * @author: LiYong
 * @date: 2019-01-22 10:50
 */
@Service
public class AddCacludeServiceImpl extends AbstractICacludeService {

    private static int type=1;

    @Override
    public int calculate(int a, int b) {
        return a+b;
    }
    @Override
    public int getType() {
        return type;
    }
}

（4）写一个策略调用中心接口和实现类，主要负责根据不同的类型调用不同的实现类

package com.winter.strategy.impl;

import com.winter.strategy.ICacludeCenter;
import com.winter.strategy.ICacludeService;
import org.apache.commons.collections.map.HashedMap;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;
import java.util.Map;

/**
 * Created with IntelliJ IDEA.
 * Description:策略调度中心，可以根据tup判断调用哪一个实现类
 *
 * @PROJECT_NAME: StudySpringBootProject
 * @author: LiYong
 * @date: 2019-01-22 10:56
 */
@Service
public class CacludeCenter implements ICacludeCenter , InitializingBean {

    @Autowired
    List<ICacludeService> iCacludeServiceList;

    private Map<Integer ,ICacludeService> map=new HashedMap();

    @Override
    public ICacludeService getCacludeService(int type) {
        return map.get(type);
    }

//这里重写spring的初始化

    @Override
    public void afterPropertiesSet() throws Exception {
        if(iCacludeServiceList!=null && iCacludeServiceList.size()>0){
            for (ICacludeService service:iCacludeServiceList) {
                map.put(service.getType(),service);
            }
        }
    }
}

[咸哼酒家]

我真怀疑这类帖子是不是CSDN自己的服务号