Spring aop @aspect无法执行切入方法

package com.hexin.pettyLoan.common.aop;



import java.util.Date;



import javax.annotation.Resource;



import org.aspectj.lang.ProceedingJoinPoint;

import org.aspectj.lang.annotation.After;

import org.aspectj.lang.annotation.AfterReturning;

import org.aspectj.lang.annotation.AfterThrowing;

import org.aspectj.lang.annotation.Around;

import org.aspectj.lang.annotation.Aspect;

import org.aspectj.lang.annotation.Before;

import org.aspectj.lang.annotation.Pointcut;

import org.springframework.stereotype.Component;





import com.hexin.core.annotation.AnnotationUtil;

import com.hexin.core.annotation.RedisRead;

import com.hexin.core.util.JSONUtil;

import com.hexin.core.util.cache.ShardedRedisUtil;





@Component

@Aspect

public class AspectJRedisRead {

	@Pointcut("execution(* com.hexin.pettyLoan.*.service.impl.*.*(..))")

	private void pointCut(){}

	public AspectJRedisRead(){

		System.out.println("aaaaaa");

	}

//	@Resource(name="shardedRedisUtil")

//	ShardedRedisUtil redisUtil;



	@Before("pointCut()")    //spring中Before通知  

    public void readBefore() {  

        System.out.println("readBefore:现在时间是:"+new Date());  

    }  

      

    @After("pointCut()")    //spring中After通知  

    public void readAfter() {  

        System.out.println("readAfter:现在时间是:"+new Date());  

    }  

    @AfterReturning("pointCut()")

    public void readAfterReturning(){

    	System.out.println("readAfterReturning:现在时间是:"+new Date());  

    }

    @AfterThrowing("pointCut()")

    public void readAfterThrowing(){

    	System.out.println("readAfterThrowing:现在时间是:"+new Date());

    }

      

    @Around("pointCut()")   //spring中Around通知  

    public Object readAround(ProceedingJoinPoint joinPoint) {  

    	Object result = null;

    	try {

    		System.out.println("readAround开始:现在时间是:"+new Date());  

    		result = joinPoint.proceed(joinPoint.getArgs()); 

    		System.out.println("readAround结束:现在时间是:"+new Date());

		} catch (Throwable e) {

			e.printStackTrace();

		}

    	return result;

    }

}

<context:annotation-config></context:annotation-config>

<!-- 启用aop -->

<aop:aspectj-autoproxy proxy-target-class="true" />

@Service("flexkeyService")

public class FlexkeyServiceImpl implements FlexkeyService {

        @Override

	public String redisTest(Integer id){

		return "this is from function";

	}

}

@RequestMapping("/redistest.do")

	public @ResponseBody String redistest(String callback){

		JsonResult result = new JsonResult();

		try{

			result = new JsonResult(1, null, flexkeyService.redisTest(1));

		}

		catch(ErrorCodeException ex){

			result = new JsonResult(-1, ex.toMessage(), null);

			logger.error(ex.toMessage(), ex);

		}

		String json =JSONUtil.toJsonpString(result, callback);

		return json;

	}