基于springBoot使用aop与mvc拦截器实现登陆校验

1.编写切面类

@Component
@Aspect
@Slf4j
public class SellerAuthorizeAspect {

    @Autowired
    StringRedisTemplate stringRedisTemplate;

    @Pointcut(value = "execution(* com.yzy.sell.Controller.Seller*.*(..))"+
    "&&!execution(* com.yzy.sell.Controller.SellerUserController.*(..))")
    public void verify(){}//配置切面，上面设置了切面的范围

    @Before(value = "verify()")//配置前置通知，beforeAdvice
    public void doVerify(){
        ServletRequestAttributes requestAttributes =
                (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
        HttpServletRequest request = requestAttributes.getRequest();
        Cookie cookie = CookieUtil.get(request, CookieConstant.name);
        //在cookie查询是否含有token的cookie
        if(cookie==null){
            log.warn("登陆校验失败,查询不到cookie");
            throw new SellerAuthorizeException(); //抛出异常，让拦截器捕获，实现登陆拦截
        }
        String tokenValue = stringRedisTemplate.opsForValue().get
                (String.format(RedisConstant.TOKEN_PREFIX,cookie.getValue()));
        if(StringUtils.isEmpty(tokenValue)){
            log.warn("登陆校验失败,在redis查询不到相应的token");
            throw new SellerAuthorizeException();
        }
    }
}

2.编写handle拦截器捕获登陆校验产生的异常

@ControllerAdvice//使用 @ControllerAdvice 实现全局异常处理
public class SellExceptionHandler {
    @Autowired
    private ProjectUrlConfig projectUrlConfig;

    //拦截登陆的异常
    @ExceptionHandler(SellerAuthorizeException.class)
    public String handlerSellException(){
        return "redirect:".concat(projectUrlConfig.getSell())
                .concat("/sell/wechat/qrAuthorize");//跳转会登陆页面
    }
}

补充：@controlleradvice注解作用：https://www.cnblogs.com/lenve/p/10748453.html

@Component
@Aspect
@Slf4j
public class SellerAuthorizeAspect {

    @Autowired
StringRedisTemplate stringRedisTemplate;

@Pointcut(value = "execution(* com.yzy.sell.Controller.Seller*.*(..))"+
    "&&!execution(* com.yzy.sell.Controller.SellerUserController.*(..))")
    public void verify(){}//配置切面，上面设置了切面的范围

@Before(value = "verify()")//配置前置通知，beforeAdvice
public void doVerify(){
        ServletRequestAttributes requestAttributes = 
                (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
HttpServletRequest request = requestAttributes.getRequest();
Cookie cookie = CookieUtil.get(request, CookieConstant.name);
//在cookie查询是否含有token的cookie
if(cookie==null){
            log.warn("登陆校验失败,查询不到cookie");
            throw new SellerAuthorizeException();
}
        String tokenValue = stringRedisTemplate.opsForValue().get
                (String.format(RedisConstant.TOKEN_PREFIX,cookie.getValue()));
        if(StringUtils.isEmpty(tokenValue)){
            log.warn("登陆校验失败,在redis查询不到相应的token");
            throw new SellerAuthorizeException();
}
    }
}