从spring容器中取出注入的bean

从spring容器中取出注入的bean 工具类，代码如下：

package com.hyzn.fw.util;

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

/**
 * @ClassName: SpringBeanUtil
 * @Description: TODO  Spring获取bean的工具类，可用于在线程里面获取bean
 *                  需要在 类上 标注 @Component ，否则没有将此工具类 注入到spring容器中
 * @author xbq
 * @version 1.0
 * @date 2017-2-21 下午2:30:38
 */
@Component
public class SpringBeanUtil implements ApplicationContextAware{

    private static ApplicationContext applicationContext = null;  

    // 获取ApplicationContext对象
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        SpringBeanUtil.applicationContext = applicationContext;
    }  

    /**
     * @Title: getBeanByName
     * @Description: TODO  通过bean的名字来获取Spring容器中的bean
     * @param beanName
     * @return
     * @return: Object
     */
    public static Object getBeanByName(String beanName) {
        if (applicationContext == null){
            return null;
        }
        return applicationContext.getBean(beanName);
    }  

    public static <T> T getBean(Class<T> type) {
        return applicationContext.getBean(type);
    }
}