aop

@Aspect
@Component
public class WeiXinRegister {


  @Pointcut("execution(public * com.workit.wx.*.controller..*.*(..))")
    public void pointcut() {

    }

    /**
     * 该标签声明次方法是一个前置通知：在目标方法开始之前执行
     *
     * @param joinPoint
     */
    @Before("pointcut()")
    public void beforMethod(JoinPoint joinPoint) throws Throwable {
        Object[] args = joinPoint.getArgs();
        HttpServletRequest request = null;
        HttpServletResponse response = null;
        for (int i = 0; i < args.length; i++) {
            if (args[i] instanceof HttpServletRequest) {
                request = (HttpServletRequest) args[i];
            }
            if (args[i] instanceof HttpServletResponse) {
                response = (HttpServletResponse) args[i];
            }
        }
        if (request == null || response == null) {
            return;
        }

    }

<!-- aop开启注解扫描 -->
<context:component-scan base-package="com.workit.wx.aspect"></context:component-scan>
<aop:aspectj-autoproxy proxy-target-class="true" />

这个放在spring mvc 配置文件中