怎样从controller中的入参获取注解所需要的值？

Question

求解答，如何从controller中的入参获取注解所需要的值，例子如下：


我的log注解接口参数中有两个方法，需要获取到从controller中穿过来的deviceID和DeviceType这两个值，现在注解中取不到这两个入参值，我应该怎么做？求解

Answer 1

AOP的JoinPoint.getArgs()本来就可以获取到啊，不需要自定义注解

Answer 2

el表达式
凑字数凑字数

Answer 3

注解
@Retention(RUNTIME)
@Target({ METHOD })
public @interface TestParam {

String a() default "";
String b() default "";

}

配置类
@Configuration
public class TestConfiguration {

@Bean
public WebMvcConfigurer customAnnoArgsResolver() {
    return new WebMvcConfigurer() {
        public void addArgumentResolvers(List<HandlerMethodArgumentResolver> resolvers) {
            resolvers.add(new HandlerMethodArgumentResolver() {

                @Override
                public boolean supportsParameter(MethodParameter parameter) {
                    Method method = (Method) parameter.getExecutable();
                    return method.getAnnotation(TestParam.class) != null
                            && Stream.of(TestParam.class.getDeclaredMethods()).map(m -> m.getName())
                                    .collect(Collectors.toList()).contains(parameter.getParameterName());
                }

                @Override
                public Object resolveArgument(MethodParameter parameter, ModelAndViewContainer mavContainer,
                        NativeWebRequest webRequest, WebDataBinderFactory binderFactory) throws Exception {
                    TestParam tp = parameter.getMethod().getAnnotation(TestParam.class);
                    Method f = TestParam.class.getDeclaredMethod(parameter.getParameterName());
                    f.setAccessible(true);
                    return f.invoke(tp);
                }
            });
        }
    };
}

}

测试
@GetMapping("/1")
@TestParam(a = "111", b = "222")
public void test1(String a, String b, @RequestParam String c) {

System.out.println(a);
System.out.println(b);
System.out.println(c);

}
实现是帮你实现了，但是这种东西真心觉得意义不大