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Spring工具类（获取bean，发布事件）

news 2025/8/4 9:03:08

spring-beans-5.3.1.jar

@Component
public final class SpringUtils implements BeanFactoryPostProcessor{/*** Spring应用上下文环境*/private static ConfigurableListableBeanFactory beanFactory;//初始化成员变量@Overridepublic void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) throws BeansException {SpringUtils.beanFactory = beanFactory;}/*** 获取对象** @param name* @return Object 一个以所给名字注册的bean的实例* @throws org.springframework.beans.BeansException*/@SuppressWarnings("unchecked")public static <T> T getBean(String name) throws BeansException {return (T) beanFactory.getBean(name);}/*** 获取类型为requiredType的对象** @param clz* @return* @throws org.springframework.beans.BeansException*/public static <T> T getBean(Class<T> clz) throws BeansException {T result = (T) beanFactory.getBean(clz);return result;}/*** 如果BeanFactory包含一个与所给名称匹配的bean定义，则返回true** @param name* @return boolean*/public static boolean containsBean(String name) {return beanFactory.containsBean(name);}/*** 判断以给定名字注册的bean定义是一个singleton还是一个prototype。 如果与给定名字相应的bean定义没有被找到，将会抛出一个异常（NoSuchBeanDefinitionException）** @param name* @return boolean* @throws org.springframework.beans.factory.NoSuchBeanDefinitionException*/public static boolean isSingleton(String name) throws NoSuchBeanDefinitionException {return beanFactory.isSingleton(name);}/*** @param name* @return Class 注册对象的类型* @throws org.springframework.beans.factory.NoSuchBeanDefinitionException*/public static Class<?> getType(String name) throws NoSuchBeanDefinitionException {return beanFactory.getType(name);}/*** 如果给定的bean名字在bean定义中有别名，则返回这些别名** @param name* @return* @throws org.springframework.beans.factory.NoSuchBeanDefinitionException*/public static String[] getAliases(String name) throws NoSuchBeanDefinitionException {return beanFactory.getAliases(name);}
}

/*** SpringContext* @author jack*/
@Slf4j
@Service
@Lazy(false)
public class SpringContextHolder implements ApplicationContextAware, DisposableBean {private static ApplicationContext applicationContext = null;/*** 取得存储在静态变量中的ApplicationContext.*/public static ApplicationContext getApplicationContext() {return applicationContext;}/*** 实现ApplicationContextAware接口, 注入Context到静态变量中.*/@Overridepublic void setApplicationContext(ApplicationContext applicationContext) {SpringContextHolder.applicationContext = applicationContext;}/*** 清除SpringContextHolder中的ApplicationContext为Null.*/public static void clearHolder() {if (log.isDebugEnabled()) {log.debug("清除SpringContextHolder中的ApplicationContext:" + applicationContext);}applicationContext = null;}/*** 发布事件** @param event*/public static void publishEvent(ApplicationEvent event) {if (applicationContext == null) {return;}applicationContext.publishEvent(event);}/*** 实现DisposableBean接口, 在Context关闭时清理静态变量.*/@Override@SneakyThrowspublic void destroy() {SpringContextHolder.clearHolder();}/*** 获取运行环境* @return*/public static String getActiveProfile() {return applicationContext.getEnvironment().getActiveProfiles()[0];}}