Spring 获取bean 的工具类

package com.example.ssm.util;

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

@Component
public class SpringContextUtil implements ApplicationContextAware {
    private static ApplicationContext applicationContext = null;

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

    public static ApplicationContext  getApplicationContext(){
        return applicationContext;
    }

    public static Object getBean(String beanName){
        return applicationContext.getBean(beanName);
    }

    public static Object getBean(Class c){
        return applicationContext.getBean(c);
    }
}