Solve the problem that NettyServerHandler cannot obtain beans in spring

the reason:

         The injected bean cannot be used in netty, because NettyServerHandler is new when netty is started, and it is not handed over to spring IOC for hosting

method 1:

         You want to complete certain initialization operations when you generate the object, and these initialization operations depend on the injected bean, so you can use @PostConstruct to annotate an init method to complete the initialization, which will be automatically called after the bean injection is completed.

public class NettyServerHandler extends ChannelInboundHandlerAdapter {

    @Autowired
    private RedisService redisService;

    private static NettyServerHandler nettyServerHandler;

    @PostConstruct
    public void init() {
        nettyServerHandler = this;
    }


    @Override
    public void channelActive(ChannelHandlerContext ctx) {
        nettyServerHandler.redisService.getString()
    }

    //。。。。。。。。。以下部分省略
}

Method 2:

          Use the tool class to obtain the required bean, call the bean method in the class outside the spring container, and place NettyOperate nettyOperate = SpringUtils.getBean(NettyOperate.class);

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

/**
 * 获取StringBean必须要加入到容器中
 */
@Component
public class SpringUtils implements ApplicationContextAware {

    private static ApplicationContext applicationContext;

    /**
     * 重写父类方法
     * @param applicationContext
     * @throws BeansException
     */
    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        if(SpringUtils.applicationContext == null){
            SpringUtils.applicationContext  = applicationContext;
        }
    }

    public static ApplicationContext getApplicationContext() {
        return applicationContext;
    }
    public static Object getBean(String name){
        return getApplicationContext().getBean(name);
    }
    public static <T> T getBean(Class<T> clazz){
        return getApplicationContext().getBean(clazz);
    }
}