springboot-9-在非springboot管理的类引入bean

package com.iwhere.test.util;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

/**
 * 在普通类中引入spring中的bean, 在springboot的扫描包下
 * @ServletComponentScan
 * 
 * 如果不在springboot的包扫描下, 则不需要component, 但需要在App.java中引入
 * @Import(value={SpringAppUtils.class})
 * 
 * @author 231
 * @time 2017年3月15日 下午2:40:32 2017
 */
@Component
public class SpringAppUtils implements ApplicationContextAware {
    private static Logger LOGGER = LoggerFactory.getLogger(SpringAppUtils.class);
    private static ApplicationContext applicationContext;

    @Override
    public void setApplicationContext(ApplicationContext context) throws BeansException {
        if (SpringAppUtils.applicationContext == null) {
            applicationContext = context;
        }
        LOGGER.info("springAppUtils is init");
    }

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

    /**
     * 通过那么获取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和class获取bean
     */
    public static <T> T getBean(String name, Class<T> clazz) {
        return getApplicationContext().getBean(name, clazz);
    }
}

@SpringBootApplication
@ServletComponentScan
@Import(value={SpringUtil.class})
publicclass App {

   {main}

}