Interceptors and filters (3) @interface custom annotation interception

一、例：Interceptors log user access to modules：

1、注解定义：

package com.demo.interceptor;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
// Declarative annotations are applied to methods
@Target(ElementType.METHOD)
// Declaration annotations are valid at runtime
@Retention(RetentionPolicy.RUNTIME)
public @interface LogModule {
    String moduleCode();
}

 2、拦截器定义：

package com.demo.interceptor;

import com.demo.enums.LogModuleEnums;
import com.demo.service.LogModuleService;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.context.support.WebApplicationContextUtils;
import org.springframework.web.method.HandlerMethod;
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