Spring Boot -- Main调用service接口

Spring Boot – Main调用service接口

添加工具类，继承ApplicationAware

package com.example.demo.configration;

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


@Component
public class SpringUtil implements ApplicationContextAware {


    /**
     * 普通类调用Spring bean对象：
     * 注意：此类需要放到App.java同包或者子包下才能被扫描，否则失效。
     */

    private static ApplicationContext applicationContext = null;


    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        if (SpringUtil.applicationContext == null) {
            SpringUtil.applicationContext = applicationContext;
        }

    }

    //获取applicationContext
    public static ApplicationContext getApplicationContext() {
        return applicationContext;
    }


    //通过name获取 Bean.
    public static Object getBean(String name) {
        return getApplicationContext().getBean(name);

    }

    //通过class获取Bean.
    public static <T> T getBean(Class<T> clazz) {
        return getApplicationContext().getBean(clazz);
    }

    //通过name,以及Clazz返回指定的Bean
    public static <T> T getBean(String name, Class<T> clazz) {
        return getApplicationContext().getBean(name, clazz);
    }

}

SpringBoot自动装配，如果想拿去它的一个Bean需要调用applicationAware的set方法，得到Application环境。然后拿到这个环境生产出你需要的Bean

调用使用