策略模式1

package com.cmit.budget.strategy;

import org.apache.commons.lang3.StringUtils;
import org.springframework.stereotype.Component;

import java.util.Map;

/**
 * @author lyc
 * @ClassName OrderContextStrategy
 * @Description TODO
 * @date 2023/3/21 14:51
 */
@Component
public class OrderContextStrategy {

    public static OrderGenerateStrategy getInstance(String commandType) {
        //此处我采用enum 也可以采用其他方式去实现
        OrderGenerateStrategy orderGenerateStrategy = null;
        Map<String, String> allClazz = OrderFilter.getAllClazz();
        String clazz = allClazz.get(commandType.trim().toLowerCase());
        if (StringUtils.isNoneEmpty(clazz)) {
            try {
                //调用无参构造器创建实例
                orderGenerateStrategy = (OrderGenerateStrategy) Class.forName(clazz).newInstance();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        return orderGenerateStrategy;
    }
}

 

package com.cmit.budget.strategy;

/**
 * @author lyc
 * @ClassName OrderAAAStrategyImpl
 * @Description TODO
 * @date 2023/3/21 14:55
 */
public class OrderAAAStrategyImpl implements OrderGenerateStrategy {
    @Override
    public boolean orderGeneration(String type) {
        return false;
    }
}

 

package com.cmit.budget.strategy;

/**
 * @author lyc
 * @ClassName OrderGoodStrategyImpl
 * @Description TODO
 * @date 2023/3/21 14:56
 */
public class OrderGoodStrategyImpl implements OrderGenerateStrategy{
    @Override
    public boolean orderGeneration(String type) {
        return false;
    }
}

 

package com.cmit.budget.strategy;

import java.util.HashMap;
import java.util.Map;

/**
 * @author lyc
 * @ClassName OrderFilter
 * @Description TODO
 * @date 2023/3/21 14:56
 */
public enum OrderFilter {
    ORDER_FILTER_NINE("9", "com.cmit.budget.strategy.OrderAAAStrategyImpl"),

    /**
     * GOOD
     */
    ORDER_FILTER_GOOD_COMPANY("23", "com.cmit.budget.strategy.OrderGoodStrategyImpl");

    private String className;
    private String command;

    public String getCommand() {
        return command;
    }

    public void setCommand(String command) {
        this.command = command;
    }

    public static Map<String, String> getAllClazz() {
        Map<String, String> map = new HashMap<>();
        for (OrderFilter commandEnum : OrderFilter.values()) {
            map.put(commandEnum.getCommand(), commandEnum.getClassName());
        }
        return map;
    }

    OrderFilter(String command, String className) {
        this.setCommand(command);
        this.setClassName(className);
    }

    public String getClassName() {
        return className;
    }

    public void setClassName(String className) {
        this.className = className;
    }
}

 

package com.cmit.budget.strategy;

/**
 * @author lyc
 * @ClassName test
 * @Description TODO
 * @date 2023/3/21 14:59
 */
public class test {
    public static void main(String[] args) {
        OrderGenerateStrategy instance = OrderContextStrategy.getInstance("9");
        boolean b = instance.orderGeneration("");
    }
}

 

package com.cmit.budget.strategy;

/**
 * @author lyc
 * @ClassName OrderGenerateStrategy
 * @Description TODO
 * @date 2023/3/21 14:52
 */
public interface OrderGenerateStrategy {

    boolean orderGeneration(String type);
}