Spring中@Autowired自动注入map详解

public interface KafkaStrategy {
 
    public void handler(McRequest mcRequest);
}

@Component("orderCancel")
@Slf4j
public class OrderCancelStrategy implements KafkaStrategy{
 
    @Autowired
    private BusinesService businesService;
 
    @Override
    public void handler(McRequest mcRequest) {
        // 执行具体的业务
        businesService.orderCancel();
    }
}
 
@Component("orderRoolback")
@Slf4j
public class OrderRoolbackStrategy implements KafkaStrategy{
 
    @Autowired
    private BusinesService businesService;
 
    @Override
    public void handler(McRequest mcRequest) {
        // 执行具体的业务
        businesService.orderRoolback();
    }
}
 
@Component("orderDelete")
@Slf4j
public class OrderDeleteStrategy implements KafkaStrategy{
 
    @Autowired
    private BusinesService businesService;
 
    @Override
    public void handler(McRequest mcRequest) {
        // 执行具体的业务
        businesService.orderDelete();
    }
}

public class TestController{
    
    // 这块其实已经把KafkaStrategy接口的实现类注入到TestController了，可以调用了
    @Autowired
    private final Map<String, KafkaStrategy> strategyMap = Maps.newConcurrentMap();
 
    // 这个构造方法的作用，其实不用也可以，为了防止重复注入，因此先清空，再注入
    public TestController(Map<String, KcStrategy> strategyMap) {
        this.strategyMap.clear();
        strategyMap.forEach(this.strategyMap::put);
    }
    
 
    public void test(){
        KafkaStrategy kafkaStrategy = strategyMap.get("orderDeleteStrategy");
        // 这样就获取到了对应的实现类了，想获取哪个都可以
    }
 
}