SpringContextHolder 使用

SpringContextHolder类

public class SpringContextHolder implements ApplicationContextAware {
    private static ApplicationContext applicationContext;

    public SpringContextHolder() {
    }

    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        SpringContextHolder.applicationContext = applicationContext;
    }

    public static ApplicationContext getApplicationContext() {
        assertApplicationContext();
        return applicationContext;
    }

    public static <T> T getBean(String beanName) {
        assertApplicationContext();
        return (T) applicationContext.getBean(beanName);
    }

    public static <T> T getBean(Class<T> requiredType) {
        assertApplicationContext();
        return applicationContext.getBean(requiredType);
    }

    private static void assertApplicationContext() {
        if (applicationContext == null) {
            throw new RuntimeException("applicaitonContext属性为null,请检查是否注入了SpringContextHolder!");
        }
    }
}

注：需要在Spring配置文件中注入该bean

<bean id="springContextHolder" class="com.amirfeng.util.SpringContextHolder"></bean>

使用SpringContextHolder

在所使用的类中添加方法

public static UserBrowsingHistoryService me() {
        return SpringContextHolder.getBean(UserBrowsingHistoryService.class);
}