切面编程

@Component
@Aspect
public class powerCheckAspect {
@Pointcut("@annotation(Power)")
public void pointCut() {
}

@Around(value = "pointCut() && @annotation(power)", argNames = "power")
public Object doAround(ProceedingJoinPoint pjp, Power power) throws Throwable {
    HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.currentRequestAttributes()).getRequest();
    HttpServletResponse response = ((ServletRequestAttributes) RequestContextHolder.currentRequestAttributes()).getResponse();
    Employee user = (Employee) request.getSession().getAttribute("user");
    if (user == null) {

//            response.sendRedirect("login.html");

return new JsonResult(506, "请先登录");

//todo:login

} else if (user.getPower() == null) {

return new JsonResult(500, "权限设置错误");

} else if ((power.value().getValue() & user.getPower()) >= power.value().getValue() || user.getPower() >= 0b100000) {

return pjp.proceed();

} else

return new JsonResult(504, "缺少权限");

}

}
// 销售退货

@Power(PowerType.xsth)

@PostMapping("/xsth//total")

public JsonResult xiaoShouTuiHuo(@RequestBody List<Cgdetail> detail_list, @PathVariable int order_total) {
System.out.println(detail_list);
return cgdetailService.AddDetailAndOrder(detail_list, order_total, true);

}
@Documented

@Target(ElementType.METHOD)

@Retention(RetentionPolicy.RUNTIME)

public @interface Power {

PowerType value();

}
public enum PowerType {

admin(0b10_0000),

user(0b01_0000),

cg(0b00_1000),

cgth(0b00_0100),

xs(0b00_0010),

xsth(0b00_0001);
private final short value;

PowerType(int value) {
    this.value = (short) value;
}

public short getValue() {
    return value;
}

}

/*
	 * 前置通知 --目标方法之前执行
	 * 后置通知 --目标方法之后执行（如果方法发生异常，不会执行）
	 * 环绕通知--在目标方法之前和之后执行
	 * 异常拦截通知--如果发生异常，就会调用
	 * 后置通知--目标方法之后执行（如果，目标方法发生异常，还会执行）
	 */