SpringBoot自定义注解赋值

首先需要引入Aop依赖

  		
            org.springframework.boot
            spring-boot-starter-aop
        

创建注解接口

创建实现类

package com.lion.annontion.myAnnontion;

import com.lion.annontion.myAnnontion.entity.User;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.beans.factory.annotation.Configurable;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;


@Component
@Aspect
public class InitParamasAspect {

    
    @Pointcut("@annotation(com.lion.annontion.myAnnontion.InitParamas)")
    public void annotationPointcut() {

    }
    @Before("annotationPointcut()")
    public void beforePointcut(JoinPoint joinPoint) {
        System.out.println("进来了beforePointcut");
        // 此处进入到方法前  可以实现一些业务逻辑
    }

    @Around("annotationPointcut()")
    public Object doAround(ProceedingJoinPoint joinPoint) throws Throwable {
        MethodSignature methodSignature = (MethodSignature) joinPoint.getSignature();
        // 获取参数名称
        String[] params = methodSignature.getParameterNames();
        // 获取参数值
        Object[] args = joinPoint.getArgs();
        if (null == params || params.length == 0){
            String mes = "Using Token annotation, the token parameter is not passed, and the parameter is not valid.";
            System.out.println(mes);
            throw new Exception(mes);
        }
        User arg = (User) args[0];
        // 对对应参数进行数据处理
        arg.setId("!11");
        arg.setName("12121");
        return joinPoint.proceed();
    }
      
    @AfterReturning("annotationPointcut()")
    public void doAfterReturning(JoinPoint joinPoint) {
    }
}