springmvc如何開啟AOP

1.spring boot實作AOP

首先建立切面類需要@Aspect，@Component注解。然後建立@Pointcut确定什麼方法實作aop。

@Pointcut("execution(* com.air_baocl.controller.selectApi.*(..))")      

然後可以選擇實作@Before(“logPointCut()”) @AfterReturning(“logPointCut()”) @AfterThrowing(“logPointCut()”) @after(“logPointCut()”) @around(“logPointCut()”)方法。代碼如下：

@Aspect
@Component
public class WebLogAspect {
    private static final Logger LOG = LoggerFactory.getLogger(WebLogAspect.class);

    @Pointcut("execution(* com.air_baocl.controller.selectApi.*(..))")
    //兩個..代表所有子目錄，最後括号裡的兩個..代表所有參數。
    //意思是selectApi類下的所有方法都實作AOP
    public void logPointCut() {
    }

    @Before("logPointCut()")
    public void doBefore(JoinPoint joinPoint) throws Throwable {
        // 接收到請求，記錄請求内容
        ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
        HttpServletRequest request = attributes.getRequest();

        // 記錄下請求内容
        LOG.info("請求位址 : " + request.getRequestURL().toString());
        LOG.info("HTTP METHOD : " + request.getMethod());
        LOG.info("IP : " + request.getRemoteAddr());
        LOG.info("CLASS_METHOD : " + joinPoint.getSignature().getDeclaringTypeName() + "."
                + joinPoint.getSignature().getName());
        LOG.info("參數 : " + Arrays.toString(joinPoint.getArgs()));

    }

    @AfterReturning(returning = "ret", pointcut = "logPointCut()")// returning的值和doAfterReturning的參數名一緻
    public void doAfterReturning(Object ret) throws Throwable {
        // 處理完請求，傳回内容
        LOG.info("傳回值 : " + ret);
    }

    @Around("logPointCut()")
    public Object doAround(ProceedingJoinPoint pjp) throws Throwable {
        long startTime = System.currentTimeMillis();
        Object ob = pjp.proceed();// ob 為方法的傳回值
        LOG.info("耗時 : " + (System.currentTimeMillis() - startTime));
        return ob;
    }
    
    @AfterThrowing("logPointCut()")  
    public void afterThrowing()  
    {  
        System.out.println("校驗token出現異常了......");  
    }
}      

2.spring mvc實作AOP

springboot預設開啟了AOP，但是mvc中預設沒有開啟，需要手動開啟。

<aop:aspectj-autoproxy></aop:aspectj-autoproxy>