Springboot Cache @Cacheable 类内部调用时不生效，解决办法

出现问题的原因：Spring cache的实现原理是基于AOP的动态代理实现的：即都在方法调用前后去获取方法的名称、参数、返回值，然后根据方法名称、参数生成缓存的key(自定义的key例外)，进行缓存。this调用不是代理对象的调用, 所以aop失效,注解失效。

解决办法就是，我们获取当前Bean,由它来调用。

SpringContextUtil

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.context.annotation.Lazy;
import org.springframework.stereotype.Component;

/**
 *不依赖于Autowired而使用java代码快速获取到spring管理的bean
 */
@Component
@Lazy(false)
public class SpringContextUtil  implements ApplicationContextAware {
     private static ApplicationContext applicationContext;
     public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
         SpringContextUtil .applicationContext = applicationContext;
     }
     public static ApplicationContext getApplicationContext() {
         return applicationContext;
     }
     public static Object getBean(String name) {
         return getApplicationContext().getBean(name);
     }
     public static <T> T getBean(Class<T> clazz) {
         return getApplicationContext().getBean(clazz);
     }
     public static <T> T getBean(String name, Class<T> clazz) {
         return getApplicationContext().getBean(name, clazz);
     }
}

Service 调用

package com.mark.pay.service;

import com.mark.pay.bean.User;
import com.mark.pay.common.spring.SpringContextUtil;
import com.mark.pay.dao.UserMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cache.annotation.*;
import org.springframework.stereotype.Service;

@Service
@CacheConfig(cacheNames = "user",cacheManager = "cacheManager")
public class TestService {

    @Autowired
    UserMapper userMapper;

    @Cacheable( key ="#id")
    public User query(Integer id) {
        return userMapper.selectByPrimaryKey(id);
    }


    public User testCacheQuery(Integer id){
        TestService service = SpringContextUtil.getBean(TestService.class);
        return service.query(id);
    }
}