package com.winner.utils;import org.springframework.beans.BeansException;import org.springframework.context.ApplicationContext;import org.springframework.context.ApplicationContextAware;import org.springframework.stereotype.Component;/** * Spring的工具类，用来获得配置文件中的bean */@Componentpublic class SpringContextUtils implements ApplicationContextAware {    private static ApplicationContext applicationContext;    /**     *  当继承了ApplicationContextAware类之后，那么程序在调用 getBean(String)的时候会自动调用该方法，     * 不用自己操作     */    @Override    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {        SpringContextUtils.applicationContext = applicationContext;    }    /***     * 根据一个bean的id获取配置文件中相应的bean     */    public static Object getBean(String beanId) throws BeansException {        if (applicationContext.containsBean(beanId)) {            applicationContext.getBean(beanId);        }        return null;    }    /***     * 根据一个bean的类型获取配置文件中相应的bean     */    public static <T> T getBeanByClass(Class<T> requiredType) throws BeansException {        return applicationContext.getBean(requiredType);    }    /**     * 如果BeanFactory包含一个与所给名称匹配的bean定义，则返回true     */    public static boolean containsBean(String name) {        return applicationContext.containsBean(name);    }    public static ApplicationContext getApplicationContext() {        return SpringContextUtils.applicationContext;    }}

<dependency>    <groupId>org.springframework</groupId>    <artifactId>spring-context</artifactId>    <version>4.2.5.RELEASE</version></dependency>