場景:使用Quartz定時器時,普通的java類需要注入spring的service類,在呼叫時報錯!

解決方式:

    /**
     * 定時獲取課程的service
     */
    @Autowired
    protected QuartzGetCourseService quartzGetCourseService = (QuartzGetCourseService) SpringContextUtil
            .getBean("quartzGetCourseService");

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

/**
 * 在Spring 註解中，普通類獲取@Service標記的方法或者bean物件
 *
 */
@Component
public class SpringContextUtil implements ApplicationContextAware {
    private static ApplicationContext applicationContext = null;

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

    public static ApplicationContext getApplicationContext() {
        return applicationContext;
    }

    /**
     * 注意 bean name預設 = 類名(首字母小寫) 例如: A8sClusterDao = getBean("a8sClusterDao")
     *
     * @param name
     * @return
     * @throws BeansException
     */
    public static Object getBean(String name) throws BeansException {
        return applicationContext.getBean(name);
    }

    /**
     * 根據類名獲取到bean
     *
     * @param <T>
     * @param clazz
     * @return
     * @throws BeansException
     */
    @SuppressWarnings("unchecked")
    public static <T> T getBeanByName(Class<T> clazz) throws BeansException {
        try {
            char[] cs = clazz.getSimpleName().toCharArray();
            cs[0] += 32;// 首字母大寫到小寫
            return (T) applicationContext.getBean(String.valueOf(cs));
        }
        catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    public static boolean containsBean(String name) {
        return applicationContext.containsBean(name);
    }

    public static boolean isSingleton(String name) throws NoSuchBeanDefinitionException {
        return applicationContext.isSingleton(name);
    }

}
 

呼叫結束,測試可以獲取Service.

借鑑文章地址找不到了!