项目中用到的策略模式+工厂模式

package com.example.demo.model;

import org.springframework.beans.factory.InitializingBean;

public interface Handler extends InitializingBean {
    public void aaa(String name);
}

package com.example.demo.impl;

import com.example.demo.model.Handler;
import org.springframework.util.StringUtils;

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

public class DemoFactory {
    private static Map<String, Handler> stringHandlerMap = new HashMap<>();

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

package com.example.demo.impl;

import com.example.demo.model.Handler;
import org.springframework.stereotype.Component;

@Component
public class DemoHandler implements Handler {

    @Override
    public void aaa(String name) {
        System.out.println(name +"demoHandler.....");
    }
    @Override
    public void afterPropertiesSet() throws Exception {
        DemoFactory.register("dd",this);
    }
}

public interface ReportHandler {
    String getResult();
}

@Component(value = "A1")
public class ReportHandlerA1 implements ReportHandler {

    @Override
    public String getResult() {
        return "我是A1";
    }
}

@Service
public class ReportFactory {

    /**
     * 初始化的时候将所有的ReportHandler自动加载到Map中
     */
    @Autowired
    private final Map<String, ReportHandler> reportIns = new ConcurrentHashMap<>();

    public ReportHandler getReportIns(String code) {
        ReportHandler reportInstance = reportIns.get(code);
        if (reportInstance == null) {
            throw new RuntimeException("未定义reportInstance");
        }

        return reportInstance;
    }

}