配置切面出现问题，执行监听前后方法执行两次情况

import java.sql.Connection;

import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.After;
import org.aspectj.lang.annotation.AfterThrowing;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import com.zy.dev.dao.impl.JdbcDao;

@Aspect
@Component
public class TxAop {
@Autowired
JdbcDao jdbcDao;
Connection conn;

@Before("execution(public * com.zy.dev.service.UserService.*(..))")
public void before(JoinPoint joinPoint) throws Exception {
conn = jdbcDao.getJdbcTemplate().getDataSource().getConnection();
conn.setAutoCommit(false);
Object[] args = joinPoint.getArgs();
String name = joinPoint.getSignature().getName();
System.out.println("执行" + name + "前执行---日志");
}

@After("execution(public * com.zy.dev.service.UserService.*(..))")
public void atfer(JoinPoint joinPoint) throws Exception {
//conn.commit();
conn.commit();
String name = joinPoint.getSignature().getName();
System.out.println("执行" + name + "后执行---日志");
}

@AfterThrowing(value = "execution(public * com.zy.dev.service.UserService.*(..))", throwing = "e")
public void atfer(JoinPoint joinPoint, Throwable e) throws Exception {
conn.rollback();
e.printStackTrace();
String name = joinPoint.getSignature().getName();
System.out.println("执行" + name);
}
}

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

如果其中切面调用方法有两次执行，那么查看spring的切面这类配置了注解和xml两种，去掉其中一种就可以
<bean class="com.zy.dev.service.TxAop"></bean>和
@Aspect
@Component
public class TxAop {
只能要一种