AspectJ获取Annotation的属性值

效果

xml开启AOP配置

<aop:config proxy-target-class="false" />
<aop:aspectj-autoproxy />
<bean id="opLogAspectj" class="com.noob.aspectj.OpLogAspectj"></bean>

使用方式：

@OpLog(model = 99)
public String test() {// do somethings }

@RequiresPermissions("rule:delete")
public Response<Integer> delete(String params, HttpServletRequest request) { // do somethings }

aspectj实现：

package com.noob.aspectj;

import lombok.extern.slf4j.Slf4j;
​
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

@Target({ElementType.METHOD, ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
public @interface OpLog {
	int model() default 1;
}

1. 对带指定注解切入，并获取到注解的属性值
   （若advice方法含注解对象，“@annotation(参数名)” 是必须的，argNames 配置非必要！但二者配置的值必定要与advice方法内注解对象名一致！ 不然没法匹配参数，启动报错）

   //表达式
       @Pointcut(value = "@annotation(com.noob.annotation.OpLog)")
       //签名
       public void opLogPointcut(){}
       
       // 另外的写法  @Around(value = "execution(@cn.utrust.trusts.config.OpLog * *.*(..)) && @annotation(opLog)"  , argNames="opLog") 
       @Around(value= "opLogPointcut() && @annotation(opLog)" ) 
       public Object aroundLog(ProceedingJoinPoint point, OpLog opLog) throws Throwable{
           Object obj = null;
           Object[] args = point.getArgs();
           
           try {
               obj = point.proceed(args);
           } catch (Throwable e) {
               log.error("方法执行异常", e);
           }
           long endTime = System.currentTimeMillis();
           MethodSignature signature = (MethodSignature) point.getSignature();
           String methodName = signature.getDeclaringTypeName() + "." + signature.getName();
           return obj;
       }

2. 指定位置的参数
   （args配置值内的参数名必定要与advice方法内参数名一致， 执行时会匹配指定位置上参数类型一致的链接点进入切面）

   @Aspect
   @Slf4j
   public class OpLogAspectj {
      
    @Pointcut(value = "@annotation(org.apache.shiro.authz.annotation.RequiresPermissions)")  
    public void permissionPointcut(){}
   
     @Around(value= "permissionPointcut() && (args(request, ..) || args(.., request))")
     public Object aroundPermission(ProceedingJoinPoint point, HttpServletRequest request) throws Throwable{
           Object obj = null;
           Object[] args = point.getArgs();
           
           try {
               SsoUser ssoUser = SsoSession.getCurrentUser(request);
               obj = point.proceed(args);
           } catch (Throwable e) {
               log.error("方法执行异常", e);
           }
           return obj;
       }    
   }