获取Spring中的Bean

1、Utils工具类

package com.xxx.common.helper;

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



@Component
public class ApplicationContextHelper implements ApplicationContextAware {
    private static ApplicationContext applicationContext;

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

}

2、获取

this.customerDAO = (CustomerDAO) ApplicationContextHelper.getBean("customerDAO");