springboot bean创建异常，报空指针nested exception is java.lang.NullPointerException

package com.example.demo.aspect;


import cn.hutool.json.JSONUtil;
import com.alibaba.csp.sentinel.Entry;
import com.alibaba.csp.sentinel.EntryType;
import com.alibaba.csp.sentinel.SphU;
import com.alibaba.csp.sentinel.config.SentinelConfig;
import com.alibaba.csp.sentinel.slots.block.BlockException;
import com.alibaba.csp.sentinel.slots.block.RuleConstant;
import com.alibaba.csp.sentinel.slots.block.flow.param.ParamFlowRule;
import com.alibaba.csp.sentinel.slots.block.flow.param.ParamFlowRuleManager;
import com.example.demo.config.NacosConfig;
import com.example.demo.constants.SentinelConstants;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.springframework.stereotype.Component;

import javax.annotation.PostConstruct;
import javax.annotation.Resource;
import java.util.ArrayList;
import java.util.Collections;

/**
 * 限流拦截器
 *
 * @author lzt
 * */
@Aspect
@Component
public class SentinelAspect {



    @Resource
    public NacosConfig config;

    @Pointcut("execution(* com.example.demo.service.SentinelTestService .*(..))")
    public void demoAspect() {

    }

    @PostConstruct
    private void init(){
        //初始化 cmm 的 QPS 控制规则
        //TODO setParamIdx(0)不太懂
        ParamFlowRule rule = new ParamFlowRule(SentinelConstants.SENTINEL_KEY).setParamIdx(0) // 指定当前 rule 对应的热点参数索引
                .setGrade(RuleConstant.FLOW_GRADE_QPS) // 限流的维度，该策略针对 QPS 限流
                .setDurationInSec(1) // 限流的单位时间
                .setCount(config.getQbs())
                .setParamFlowItemList(new ArrayList<>());

        ParamFlowRuleManager.loadRules(Collections.singletonList(rule));
    }

    @Around("demoAspect()")
    public Object check(ProceedingJoinPoint joinPoint) {
        Object result=null;
        Object[] values = joinPoint.getArgs();
        String param = JSONUtil.toJsonStr(values[0]);
        Entry entry=null;
        try {
            //TODO entry()里参数具体含义
            entry= SphU.entry(SentinelConstants.SENTINEL_KEY, EntryType.IN,1,param);
        }catch (BlockException e){
            return "请求太过频繁";
        }finally {
            if (entry!=null){
                entry.exit();
            }
        }
        return null;
    }


}

@Autowired不是@Resource

 @Autowired
 public NacosConfig config;

问题描述的不够清楚，可以把异常堆栈全部贴出来看看。楼上的回答是一种可能性，因为 @Resource 默认通过 ByName 的方式在 Spring 容器中寻找容器。如果没有刻意指定 NacosConfig 在Spring容器中的命名，则默认的 beanName 是 nacosConfig。
所以可以尝试改为
@Resource
public NacosConfig nacosConfig;