ApplicationContextAware

@Component
public class NettyClient implements ApplicationContextAware {
   
    NettyClientHandler nettyClientHandler;
    /**
     * 当前 ApplicationContent 后面注入用
     */
    private ApplicationContext applicationContext;
    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        this.applicationContext = applicationContext;
    }
    public void doConnect() { 
        nettyClientHandler =applicationContext.getBean(NettyClientHandler.class); 
        ....pipeline.addLast(nettyClientHandler);
    }
}

@Component
public class NettyClient implements ApplicationContextAware {
   
    @Autowired
    NettyClientHandler nettyClientHandler;
 
    public void doConnect() { 
        ....pipeline.addLast(nettyClientHandler);
    }
}