spring-beans-5.3.1.jar文章来源地址https://www.toymoban.com/news/detail-671574.html
@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
@Override
public 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.
*/
@Override
public 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
@SneakyThrows
public void destroy() {
SpringContextHolder.clearHolder();
}
/**
* 获取运行环境
* @return
*/
public static String getActiveProfile() {
return applicationContext.getEnvironment().getActiveProfiles()[0];
}
}
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