//从ApplicationContext中取出已创建好的的对象
//不可直接反射创建serviceimpi对象，因为反射创建出来的对象无法实例化dao接口
ApplicationContext applicationContext = SpringBootBeanUtil.getApplicationContext();
//反射创建serviceimpi实体对象，和实体类
Class<?> ServiceImpl = Class.forName(serviceName);
//反射设置方法参数。
Method method = ServiceImpl.getMethod(serviceMethod, String.class);
//在ApplicationContext中根据class取出已实例化的bean
Object invoke = method.invoke(applicationContext.getBean(ServiceImpl), serviceParam);
if (invoke != null) {
    res = invoke;
}

@Component
public class SpringBootBeanUtil implements ApplicationContextAware {

    private static ApplicationContext applicationContext;

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        if (SpringBootBeanUtil.applicationContext == null) {
            SpringBootBeanUtil.applicationContext = applicationContext;
        }
        System.out.println("========ApplicationContext配置成功========");
        System.out.println("========在普通类可以通过调用SpringBootBeanUtil.getApplicationContext()获取applicationContext对象========");
        System.out.println("========applicationContext=" + SpringBootBeanUtil.applicationContext + "========");
    }

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

    /**
     * 通过name获取 Bean.
     *
     * @param name
     * @return
     */
    public static Object getBean(String name) {
        return getApplicationContext().getBean(name);
    }

    /**
     * 通过class获取Bean.
     *
     * @param clazz
     * @return
     */
    public static <T> T getBean(Class<T> clazz) {
        return getApplicationContext().getBean(clazz);
    }

    /**
     * 通过name,以及Clazz返回指定的Bean
     *
     * @param name
     * @param clazz
     * @return
     */
    public static <T> T getBean(String name, Class<T> clazz) {
        return getApplicationContext().getBean(name, clazz);
    }

}