Springboot中实现策略模式+工厂模式的方法

package com.hqs.pattern.factory;

import com.hqs.pattern.strategy.Strategy;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
/**
 * @author huangqingshi
 * @Date 2019-01-31
 */
@Service
public class FactoryForStrategy {
    @Autowired
    Map<String, Strategy> strategys = new ConcurrentHashMap<>(3);
    public Strategy getStrategy(String component) throws Exception{
        Strategy strategy = strategys.get(component);
        if(strategy == null) {
            throw new RuntimeException("no strategy defined");
        }
        return strategy;
    }
}

package com.hqs.pattern.strategy;

/**
 * @author huangqingshi
 * @Date 2019-01-31
 */
public interface Strategy {
    String doOperation();
}

package com.hqs.pattern.strategy.impl;

import com.hqs.pattern.strategy.Strategy;
import org.springframework.stereotype.Component;
/**
 * @author huangqingshi
 * @Date 2019-01-31
 */
@Component("one")
public class StrategyOne implements Strategy {
    @Override
    public String doOperation() {
        return "one";
    }
}

package com.hqs.pattern.controller;

import com.hqs.pattern.factory.FactoryForStrategy;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
/**
 * @author huangqingshi
 * @Date 2019-01-31
 */
@Controller
public class StrategyController {
    @Autowired
    FactoryForStrategy factoryForStrategy;
    @PostMapping("/strategy")
    @ResponseBody
    public String strategy(@RequestParam("key") String key) {
        String result;
        try {
            result = factoryForStrategy.getStrategy(key).doOperation();
        } catch (Exception e) {
            result = e.getMessage();
        }
        return result;
    }
}