快速获取spring容器内的bean对象 SpringBeanUtils

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

/**
 * @author: 小熊
 **/
@Component
public class SpringBeanUtils implements ApplicationContextAware {
    private static ApplicationContext applicationContext;

    private SpringBeanUtils() {
    }

    /**
     * 设置上下文
     *
     * @param applicationContext
     * @throws BeansException
     */
    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        if (SpringBeanUtils.applicationContext == null) {
            SpringBeanUtils.applicationContext = applicationContext;
        }
    }

    /**
     * 获取上下文
     *
     * @return
     */
    public static ApplicationContext getApplicationContext() {
        return applicationContext;
    }

    /**
     * 通过名字获取上下文中的bean
     *
     * @param name
     * @return
     */
    public static Object getBean(String name) {
        return applicationContext.getBean(name);
    }

    /**
     * 通过类型获取上下文中的bean
     *
     * @param requiredType
     * @return
     */
    public static <T> T getBean(Class<T> requiredType) {
        return applicationContext.getBean(requiredType);
    }
}