项目启动时加载方法

实现InitializingBean 接口中的方法

package com.qingcheng.service.impl;

import com.qingcheng.service.goods.CategoryService;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

@Component
public class Init implements InitializingBean {

    @Autowired
    private CategoryService categoryService;

    public void afterPropertiesSet() throws Exception {
        System.out.println("=============缓存预热=============");
        categoryService.saveCategoryTreeToRedis();
    }
}