Spring 通过构造器自动注入所有子类

目的：通过反射的方式动态调用子类方法

代码示例：

@Component
public class RequestContent {
    private final Map<Class<? extends RequestHandler>, RequestHandler> handlerMap = new ConcurrentHashMap();
    
    @Autowired
    public RequestContext(Map<String, RequestHandler> handlers) {
        handler.forEach((k, v) -> this.handlerMap.put(v.getClass(), v));
    }
}