SpringBoot解决@Component无法注入其他Bean的问题

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component; 
@Component
public class ApplicationContextProvider implements ApplicationContextAware {
 
    
    private static ApplicationContext applicationContext;
 
    @SuppressWarnings("static-access")
    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        this.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);
    }
 
    
    public static <T> T getBean(String name, Class<T> clazz) {
        return getApplicationContext().getBean(name, clazz);
    } 
}

import io.Netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.Http.FullHttpRequest;
import org.apache.log4j.Logger; 
public class IdentityCheckUtil { 
    private Logger logger = Logger.getLogger(IdentityCheckUtil.class); 
    private UserMapper userMapper; 
    public IdentityCheckUtil() {
        this.userMapper = ApplicationContextProvider.getBean(UserMapper.class);
    } 
    public boolean allowedPass(ChannelHandlerContext ctx, FullHttpRequest fullHttpRequest) {
        System.out.println(userMapper);
    }
}