一个接口多个实现

工厂模式：通过一个工厂类根据不同的条件获取不同的实现对象

@Component
public class FlowHandleFactory {
    private final Map<Integer, FlowHandleService> handleServiceMap = new HashMap<>();
    
    @Autowired
    public FlowHandleFactory(@Qualifier("scrapAuditHandleServiceImpl") ScrapAuditHandleServiceImpl scrapAuditHandleServiceImpl,
                             @Qualifier("flowHandleServiceImpl") FlowHandleServiceImpl flowHandleServiceImpl) {
        handleServiceMap.put(1, scrapAuditHandleServiceImpl);
        handleServiceMap.put(2, flowHandleServiceImpl);
    }

    public FlowHandleService getFlowHandleService(Integer type) {
        return handleServiceMap.get(type);
    }
}

或者通过获取上下文的Bean实现

@Component
public class FlowHandleFactory implements ApplicationContextAware {
    private final Map<Integer, FlowHandleService> handleServiceMap = new HashMap<>();
    private ApplicationContext applicationContext;

    @Override
    public void setApplicationContext(@NotNull ApplicationContext applicationContext) throws BeansException {
        this.applicationContext = applicationContext;
    }

    @PostConstruct
    public void init(){
        handleServiceMap.put(FlowModuleEnum.DEVICE_SCRAP.getType(),applicationContext.getBean(ScrapAuditHandleServiceImpl.class));
    }

    public FlowHandleService getFlowHandleService(Integer type) {
        return handleServiceMap.get(type);
    }
}

使用的时候

FlowHandleService flowHandleService = flowHandleFactory.getFlowHandleService(FlowModuleEnum.DEVICE_SCRAP.getType());
return flowHandleService.handleService(instance,nodeTaskDTO);