aop实现对方法参数的获取

/**
 * 描述：注解
 *
 * @author Administrator
 * @since 2022/7/11
 */
@Target(value = {ElementType.METHOD, ElementType.TYPE, ElementType.FIELD, ElementType.PARAMETER})
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface MyParam {
    String value() default "";
}
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/**
 * desc: 具体逻辑 <br>
 * date: 2022/7/11
 *
 * @author Administrator
 */
@Slf4j
@Aspect
@Component
public class MyParamAsp {
    @Pointcut("@annotation(com.zyjournals.web.miniprogram.config.anno.MyParam)")
    public void controllerAspect() {
    }
    @Before("controllerAspect()")
    public void doBefore() {
        log.info("===========================>AOP Before");
    }
    /**
     * desc: aop after <br>
     * date: 2022/7/11
     *
     * @author Administrator
     */
    @After("controllerAspect()")
    public void doAfter(JoinPoint joinPoint) throws NoSuchMethodException {
        log.info("===========================>AOP After");
        MethodSignature signature = (MethodSignature) joinPoint.getSignature();
        Method method = signature.getMethod();
        // 请求的方法参数值
        Object[] args = joinPoint.getArgs();
        // 请求的方法参数名称
        LocalVariableTableParameterNameDiscoverer u = new LocalVariableTableParameterNameDiscoverer();
        String[] paramNames = u.getParameterNames(method);
        if (args != null && paramNames != null) {
            String params = "";
            for (int i = 0; i < args.length; i++) {
                params += "  " + paramNames[i] + ": " + args[i];
                System.out.println("params = " + params);
            }
        }
    }
}
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@MyParam("flag")
public void testAop(String flag , String tag) {
    log.info("===========================>测试方法执行了");
}